AGU Index terms mapping, 1 January 2005


See Browseable Index Terms list
  1995   2005  
0300 ATMOSPHERIC COMPOSITION AND STRUCTURE 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE unchanged
0305 Aerosols and particles (0345, 4801) 0305 Aerosols and particles (0345, 4801, 4906) unchanged, added xr
0310 Airglow and aurora 0310 Airglow and aurora unchanged
0312 Air/sea constituent fluxes (3339, 4504) 0312 Air/sea constituent fluxes (3339, 4504) unchanged
0315 Biosphere/atmosphere interactions (0426) 0315 Biosphere/atmosphere interactions (0426, 1610) unchanged, added xr
0317 Chemical kinetic and photochemical properties 0317 Chemical kinetic and photochemical properties unchanged
0320 Cloud physics and chemistry 0320 Cloud physics and chemistry unchanged
    0319 Cloud optics new
    0321 Cloud/radiation interaction new
0322 Constituent sources and sinks 0322 Constituent sources and sinks unchanged
0325 Evolution of the atmosphere 0325 Evolution of the atmosphere (1610, 8125) unchanged, added xr
    0328 Exosphere new
0330 Geochemical cycles 0330 Geochemical cycles (1030) unchanged, added xr
0335 Ion chemistry of the atmosphere (2419, 2427) 0335 Ion chemistry of the atmosphere (2419, 2427) unchanged
0340 Middle atmosphere: composition and chemistry 0340 Middle atmosphere: composition and chemistry unchanged
0341 Middle atmosphere: constituent transport and chemistry (3334) 0341 Middle atmosphere: constituent transport and chemistry (3334) unchanged
0342 Middle atmosphere: energy deposition 0342 Middle atmosphere: energy deposition (3334) unchanged, added xr
0343 Planetary atmospheres (5405, 5407, 5409, 5704, 5705, 5707) 0343 Planetary atmospheres (5210, 5405, 5704) unchanged, added xr
0345 Pollution--urban and regional (0305) 0345 Pollution: urban and regional (0305, 0478, 4251) unchanged, added xr
0350 Pressure, density, and temperature 0350 Pressure, density, and temperature unchanged
0355 Thermosphere--composition and chemistry 0355 Thermosphere: composition and chemistry unchanged
0358 Thermosphere--energy deposition 0358 Thermosphere: energy deposition (3369) unchanged, added xr
0360 Transmission and scattering of radiation 0360 Radiation: transmission and scattering revised
0365 Troposphere--composition and chemistry 0365 Troposphere: composition and chemistry unchanged
0368 Troposphere--constituent transport and chemistry 0368 Troposphere: constituent transport and chemistry unchanged
0370 Volcanic effects (8409) 0370 Volcanic effects (8409) unchanged
0394 Instruments and techniques 0394 Instruments and techniques unchanged
0399 General or miscellaneous 0399 General or miscellaneous unchanged
  0400 BIOGEOSCIENCES new
    0402 Agricultural systems new
    0404 Anoxic and hypoxic environments (4802, 4834) new
    0406 Astrobiology and extraterrestrial materials new
    0408 Benthic processes (4804) new
    0409 Bioavailability: chemical speciation and complexation new
    0410 Biodiversity new
    0412 Biogeochemical kinetics and reaction modeling (0414, 0793, 1615, 4805, 4912) new
    0414 Biogeochemical cycles, processes, and modeling (0412, 0793, 1615, 4805, 4912) new
    0416 Biogeophysics new
    0418 Bioremediation new
    0419 Biomineralization new
    0420 Biomolecular and chemical tracers new
    0422 Bio-optics new
    0424 Biosignatures and proxies new
    0426 Biosphere/atmosphere interactions (0315) new
    0428 Carbon cycling (4806) new
    0429 Climate dynamics (1620) new
    0430 Computational methods and data processing new
    0432 Contaminant and organic biogeochemistry (0792) new
    0434 Data sets new
    0438 Diel, seasonal, and annual cycles (4227) new
    0439 Ecosystems, structure and dynamics (4815) new
    0442 Estuarine and nearshore processes (4235) new
    0444 Evolutionary geobiology new
    0448 Geomicrobiology new
    0450 Hydrothermal systems (1034, 3017, 3616, 4832, 8135, 8424) new
    0452 Instruments and techniques new
    0454 Isotopic composition and chemistry (1041, 4870) new
    0456 Life in extreme environments new
    0458 Limnology (1845, 4239, 4942) new
    0459 Macro- and micropaleontology (3030, 4944) new
    0460 Marine systems (4800) new
    0461 Metals new
    0463 Microbe/mineral interactions new
    0465 Microbiology: ecology, physiology and genomics (4840) new
    0466 Modeling new
    0468 Natural hazards new
    0469 Nitrogen cycling new
    0470 Nutrients and nutrient cycling (4845, 4850) new
    0471 Oxidation/reduction reactions (4851) new
    0473 Paleoclimatology and paleoceanography (3344, 4900) new
    0475 Permafrost, cryosphere, and high-latitude processes (0702, 0716) new
    0476 Plant ecology (1851) new
    0478 Pollution: urban, regional and global (0345, 4251) new
    0480 Remote sensing new
    0481 Restoration new
    0483 Riparian systems (0744, 1856) new
    0485 Science policy (6620) new
    0486 Soils/pedology (1865) new
    0488 Sulfur cycling new
    0489 Trace element cycling (4875) new
    0490 Trace gases new
    0491 Food webs and trophodynamics (4817) new
    0493 Urban systems new
    0495 Water/energy interactions (1878) new
    0496 Water quality new
    0497 Wetlands (1890) new
    0498 General or miscellaneous new
    0499 New fields (not classifiable under other headings) new
  0500 COMPUTATIONAL GEOPHYSICS (3200, 3252, 7833) new
    0510 Agent-based new
    0555 Neural networks, fuzzy logic, machine learning new
    0560 Numerical solutions (4255) new
    0594 Instruments and techniques new
    0599 General or miscellaneous new
0600 ELECTROMAGNETICS 0600 ELECTROMAGNETICS unchanged
0604 Antenna arrays 0604 Antenna arrays unchanged
0609 Antennas 0609 Antennas unchanged
0614 Biological effects 0614 Biological effects unchanged
0619 Electromagnetic theory 0619 Electromagnetic theory unchanged
0624 Guided waves 0624 Guided waves unchanged
0629 Inverse scattering 0629 Inverse scattering unchanged
0634 Measurement and standards 0634 Measurement and standards unchanged
0639 Nonlinear electromagnetics 0639 Nonlinear electromagnetics unchanged
0644 Numerical methods 0644 Numerical methods unchanged
0649 Optics 0649 Optics (4264) unchanged, added xr
0654 Plasmas 0654 Plasmas unchanged
0659 Random media and rough surfaces 0659 Random media and rough surfaces unchanged
0664 Reflectors and feeds 0664 Reflectors and feeds unchanged
0669 Scattering and diffraction 0669 Scattering and diffraction unchanged
0674 Signal processing and adaptive antennas 0674 Signal processing and adaptive antennas (6974) unchanged, aded xr
0679 Singularity expansion method 0679 Singularity expansion method unchanged
0684 Transient and time domain 0684 Transient and time domain unchanged
0689 Wave propagation (4275) 0689 Wave propagation (2487, 3285, 4275, 4455, 6934) unchanged, added xr
0694 Instrumentation and techniques 0694 Instruments and techniques unchanged
0699 General or miscellaneous 0699 General or miscellaneous unchanged
  0700 CRYOSPHERE (4540) new
    0702 Permafrost (0475) new
    0704 Seasonally frozen ground new
    0706 Active layer new
    0708 Thermokarst new
    0710 Periglacial processes new
    0712 Cryosol new
    0714 Clathrate new
    0716 Cryobiology (0475) new
    0718 Tundra (9315) new
    0720 Glaciers new
    0722 Rock glaciers new
    0724 Ice cores (4932) new
    0726 Ice sheets new
    0728 Ice shelves new
    0730 Ice streams new
    0732 Icebergs new
    0734 Icing (aufeis, naled) new
    0736 Snow (1827, 1863) new
    0738 Ice (1863) new
    0740 Snowmelt new
    0742 Avalanches new
    0744 Rivers (0483, 1856) new
    0746 Lakes (9345) new
    0748 Ponds new
    0750 Sea ice (4540) new
    0752 Polynas (4540) new
    0754 Leads (4540) new
    0758 Remote sensing new
    0760 Engineering new
    0762 Mass balance (1218, 1223) new
    0764 Energy balance new
    0766 Thermodynamics (1011, 3611, 8411) new
    0768 Thermal regime new
    0770 Properties new
    0772 Distribution new
    0774 Dynamics new
    0776 Glaciology (1621, 1827, 1863) new
    0790 Weathering (1625, 1886) new
    0792 Contaminants (0432) new
    0793 Biogeochemistry (0412, 0414, 1615, 4805, 4912) new
    0794 Instruments and techniques new
    0798 Modeling new
    0799 General or miscellaneous new
  0800 EDUCATION new, moved from 6605
    0805 Elementary and secondary education new
    0810 Post-secondary education new
    0815 Informal education new
    0820 Curriculum and laboratory design new
    0825 Teaching methods new
    0830 Teacher training new
    0840 Evaluation and assessment new
    0845 Instructional tools new
    0850 Geoscience education research new
    0855 Diversity new
0900 EXPLORATION GEOPHYSICS 0900 EXPLORATION GEOPHYSICS unchanged
0902 Computational methods: seismic 0902 Computational methods: seismic unchanged
0903 Computational methods: potential fields 0903 Computational methods: potential fields (1214) unchanged, added xr
0905 Continental structures (8109, 8110) 0905 Continental structures (8109, 8110) unchanged
0910 Data processing 0910 Data processing unchanged
0915 Downhole methods 0915 Downhole methods unchanged
0920 Gravity methods 0920 Gravity methods (1219) unchanged, added xr
0925 Magnetic and electrical methods 0925 Magnetic and electrical methods (5109) unchanged, added xr
0930 Oceanic structures 0930 Oceanic structures unchanged
0932 Radioactivity methods 0932 Radioactivity methods unchanged
0933 Remote sensing 0933 Remote sensing unchanged
0935 Seismic methods (3025) 0935 Seismic methods (3025, 7294) unchanged, added xr
0994 Instruments and techniques 0994 Instruments and techniques unchanged
0999 General or miscellaneous 0999 General or miscellaneous unchanged
1000 GEOCHEMISTRY 1000 GEOCHEMISTRY unchanged
    1009 Geochemical modeling (3610, 8410) new
1010 Chemical evolution     deleted
    1011 Thermodynamics (0766, 3611, 8411) new
    1012 Reactions and phase equilibria (3612, 8412) new
    1031 Subduction zone processes (3060, 3613, 8170, 8413) new
    1032 Mid-oceanic ridge processes (3614, 8416) new
    1033 Intra-plate processes (3615, 8415) new
    1034 Hydrothermal systems (0450, 3017, 3616, 4832, 8135, 8424) new
    1039 Alteration and weathering processes (3617) new
    1036 Magma chamber processes (3618) new
    1037 Magma genesis and partial melting (3619) new
    1038 Mantle processes (3621) new
1015 Composition of the core 1015 Composition of the core unchanged
1020 Composition of the crust 1020 Composition of the continental crust split to 1020 and 1021
    1021 Composition of the oceanic crust new
    1022 Composition of the hydrosphere new
    1023 Composition of the biosphere new
1025 Composition of the mantle 1025 Composition of the mantle unchanged
    1026 Composition of the moon new
    1027 Composition of the planets new
    1028 Composition of meteorites (3662, 6240) new
    1029 Composition of aerosols and dust particles new
1030 Geochemical cycles (0330) 1030 Geochemical cycles (0330) unchanged
1035 Geochronology     deleted, moved to new category 1100
1065 Trace elements (3670) 1065 Major and trace element geochemistry revised
1040 Isotopic composition/geochemistry 1040 Radiogenic isotope geochemistry revised
    1041 Stable isotope geochemistry (0454, 4870) new
    1042 Mineral and crystal chemistry (3620) new
    1043 Fluid and melt inclusion geochemistry new
1045 Low-temperature geochemistry     deleted
1050 Marine geochemistry (4835, 4850) 1050 Marine geochemistry (4835, 4845, 4850) unchanged
    1051 Sedimentary geochemistry new
1055 Organic geochemistry 1055 Organic and biogenic geochemistry revised
1060 Planetary geochemistry (5405, 5410, 5704, 5709, 6005, 6008) 1060 Planetary geochemistry (5405, 5410, 5704, 5709, 6005, 6008) unchanged
    1090 Field relationships (3690, 8486) new
1094 Instruments and techniques 1094 Instruments and techniques unchanged
1099 General or miscellaneous 1099 General or miscellaneous unchanged
  1100 GEOCHRONOLOGY new (was 1035)
    1105 Quaternary geochronology new
    1110 Sidereal geochronology new
    1115 Radioisotope geochronology new
    1120 Isotopic disequilibrium dating new
    1125 Chemical and biological geochronology new
    1130 Geomorphological geochronology new
    1135 Correlative geochronology new
    1140 Thermochronology new
    1145 Tephrochronology (8455) new
    1150 Cosmogenic-nuclide exposure dating (4918) new
    1155 Extinct radionuclide geochronology new
    1160 Planetary and lunar geochronology new
    1165 Sedimentary geochronology new
    1194 Instruments and techniques new
    1199 General or miscellaneous new
1200 GEODESY and GRAVITY 1200 GEODESY and GRAVITY unchanged
1206 Crustal movements--interplate (8155)     deleted
1208 Crustal movements--intraplate (8110)     deleted
1210 Diurnal and subdiurnal rotational variations     deleted
1224 Photogrammetry     deleted
1244 Standards and absolute measurements 1244 Standards and absolute measurements unchanged
    1295 Integrations of techniques new
    1240 Satellite geodesy: results (6929, 7215, 7230, 7240) new
1241 Satellite orbits 1241 Satellite geodesy: technical issues (6994, 7969) revised
1243 Space geodetic surveys 1243 Space geodetic surveys unchanged
1204 Control surveys 1204 Control surveys unchanged
1242 Seismic deformations (7205) 1242 Seismic cycle related deformations (6924, 7209, 7223, 7230) revised
    1207 Transient deformation (6924, 7230, 7240) new
    1209 Tectonic deformation (6924) new
    1211 Non-tectonic deformation new
1212 Earth's interior--composition and state (8105, 8124) 1212 Earth's interior: composition and state (7207, 7208, 8105, 8124) unchanged, added xr
1213 Earth's interior--dynamics ( 8115, 8120) 1213 Earth's interior: dynamics (1507, 7207, 7208, 8115, 8120) unchanged, added xr
1236 Rheology of the lithosphere and mantle (8160) 1236 Rheology of the lithosphere and mantle (7218, 8160) unchanged, added xr
1219 Local gravity anomalies and crustal structure 1219 Gravity anomalies and Earth structure (0920, 7205, 7240) revised, added xr
1214 Geopotential theory and determination 1214 Geopotential theory and determination (0903) unchanged, added xr
1227 Planetary geodesy and gravity (5420, 5714, 6019)     deleted, merged into 1221
    1217 Time variable gravity (7223, 7230) new
1229 Reference systems 1229 Reference systems unchanged
1234 Regional and global gravity anomalies and Earth structure     deleted, merged into 1219
1239 Rotational variations 1239 Earth rotation variations revised
1223 Ocean/Earth/atmosphere interactions (3339) 1223 Ocean/Earth/atmosphere/hydrosphere/cryosphere interactions (0762, 1218, 3319, 4550) revised, added xr
    1218 Mass balance (0762, 1223, 1631, 1836, 1843, 3010, 3322, 4532) new
    1220 Atmosphere monitoring with geodetic techniques (6952) new
    1222 Ocean monitoring with geodetic techniques (1225, 1641, 3010, 4532, 4556, 4560, 6959) new
    1225 Global change from geodesy (1222, 1622, 1630, 1641, 1645, 4556) new
1247 Terrestrial reference systems     deleted, merged into 1229
1249 Tides--Earth     deleted, merged into 1217
1255 Tides--ocean (4560)     deleted, merged into 1212
1221 Lunar geodesy and gravity (6250) 1221 Lunar and planetary geodesy and gravity (5417, 5450, 5714, 5744, 6019, 6250) revised, merged with 1227, added xr
1294 Instruments and techniques 1294 Instruments and techniques unchanged
1299 General or miscellaneous 1299 General or miscellaneous (1709) unchanged, added xr
1500 GEOMAGNETISM and PALEOMAGNETISM 1500 GEOMAGNETISM and PALEOMAGNETISM unchanged
1503 Archeomagnetism 1503 Archeomagnetism unchanged
1505 Biomagnetism 1505 Biogenic magnetic minerals revised
1507 Core processes (8115) 1507 Core processes (1213, 8115) unchanged, added xr
1510 Dynamo theories 1510 Dynamo: theories and simulations revised
1512 Environmental magnetism 1512 Environmental magnetism unchanged
1513 Geomagnetic excursions 1513 Geomagnetic excursions unchanged
1515 Geomagnetic induction 1515 Geomagnetic induction unchanged
1517 Magnetic anomaly modeling 1517 Magnetic anomalies: modeling and interpretation revised
1518 Magnetic fabrics and anisotropy 1518 Magnetic fabrics and anisotropy unchanged
1519 Magnetic mineralogy and petrology 1519 Magnetic mineralogy and petrology unchanged
1520 Magnetostratigraphy 1520 Magnetostratigraphy unchanged
1521 Paleointensity 1521 Paleointensity unchanged
1522 Paleomagnetic secular variation 1522 Paleomagnetic secular variation unchanged
1525 Paleomagnetism applied to tectonics (regional, global) 1525 Paleomagnetism applied to tectonics: regional, global unchanged
1527 Paleomagnetism applied to geologic processes 1527 Paleomagnetism applied to geologic processes unchanged
1530 Rapid time variations 1530 Rapid time variations unchanged
1532 Reference fields (regional, global) 1532 Reference fields: regional, global unchanged
1533 Remagnetization 1533 Remagnetization unchanged
1535 Reversals (process, timescale, magnetostratigraphy) 1535 Reversals: process, timescale, magnetostratigraphy unchanged
1540 Rock and mineral magnetism 1540 Rock and mineral magnetism unchanged
    1541 Satellite magnetics: main field, crustal field, external field new
1545 Spatial variations (all harmonics and anomalies) 1545 Spatial variations: all harmonics and anomalies unchanged
1550 Spatial variations attributed to seafloor spreading (3005) 1550 Spatial variations attributed to seafloor spreading (3005) unchanged
1555 Time variations--diurnal to decadal 1555 Time variations: diurnal to decadal unchanged
1560 Time variations--secular and longer 1560 Time variations: secular and longer unchanged
1594 Instruments and techniques 1594 Instruments and techniques unchanged
    1595 Planetary magnetism: all frequencies and wavelengths new
1599 General or miscellaneous 1599 General or miscellaneous unchanged
1600 GLOBAL CHANGE 1600 GLOBAL CHANGE unchanged
    1605 Abrupt/rapid climate change (4901, 8408) new
1610 Atmosphere (0315, 0325) 1610 Atmosphere (0315, 0325) unchanged
1615 Biogeochemical processes (4805) 1615 Biogeochemical cycles, processes, and modeling (0412, 0414, 0793, 4805, 4912) unchanged, added xr
    1616 Climate variability (1635, 3305, 3309, 4215, 4513) new
1620 Climate dynamics (3309) 1620 Climate dynamics (0429, 3309) unchanged, added xr
    1621 Cryospheric change (0776) new
    1622 Earth system modeling (1225) new
1625 Geomorphology and weathering (1824, 1886) 1625 Geomorphology and weathering (0790, 1824, 1825, 1826, 1886) unchanged, added xr
    1626 Global climate models (3337, 4928) new
1630 Impact phenomena 1630 Impacts of global change (1225) revised
    1631 Land/atmosphere interactions (1218, 1843, 3322) new
    1632 Land cover change new
1635 Oceans (4203) 1635 Oceans (1616, 3305, 4215, 4513) unchanged, revised xr
    1637 Regional climate change new
1640 Remote sensing 1640 Remote sensing (1855) unchanged, added xr
    1641 Sea level change (1222, 1225, 4556) new
1645 Solid Earth 1645 Solid Earth (1225) unchanged, added xr
1650 Solar variability 1650 Solar variability (7537) unchanged, added xr
1655 Water cycles (1836) 1655 Water cycles (1836) unchanged
1694 Instruments and techniques 1694 Instruments and techniques unchanged
1699 General or miscellaneous 1699 General or miscellaneous unchanged
1700 HISTORY OF GEOPHYSICS 1700 HISTORY OF GEOPHYSICS unchanged
1704 Atmospheric sciences 1704 Atmospheric sciences unchanged
    1705 Biogeosciences new
    1706 Computational geophysics new
    1707 Cryosphere new
    1708 Geochronology new
1709 Geodesy 1709 Geodesy (1299) unchanged, added xr
1714 Geomagnetism and paleomagnetism 1714 Geomagnetism and paleomagnetism unchanged
1719 Hydrology 1719 Hydrology unchanged
    1721 Nonlinear geophysics new
1724 Ocean sciences 1724 Ocean sciences unchanged
1729 Planetology 1729 Planetology unchanged
1734 Seismology 1734 Seismology unchanged
1739 Solar/planetary relationships 1739 Solar/planetary relationships unchanged
1744 Tectonophysics 1744 Tectonophysics unchanged
1749 Volcanology, geochemistry, and petrology 1749 Volcanology, geochemistry, and petrology unchanged
1794 Instruments and techniques 1794 Instruments and techniques unchanged
1799 General or miscellaneous 1799 General or miscellaneous unchanged
1800 HYDROLOGY 1800 HYDROLOGY unchanged
1803 Anthropogenic effects 1803 Anthropogenic effects (4802, 4902) unchanged, added xr
    1804 Catchment new
1806 Chemistry of fresh water 1806 Chemistry of fresh water unchanged
    1807 Climate impacts new
    1805 Computational hydrology new
    1808 Dams new
    1810 Debris flow and landslides new
1809 Desertification 1809 Desertification unchanged
1812 Drought 1812 Drought unchanged
    1813 Eco-hydrology new
    1814 Energy budgets new
1815 Erosion and sedimentation 1815 Erosion split into 1815 and 1861
    1816 Estimation and forecasting new
1818 Evapotranspiration 1818 Evapotranspiration unchanged
    1817 Extreme events new
1821 Floods 1821 Floods unchanged
    1820 Floodplain dynamics new
1823 Frozen ground 1823 Frozen ground unchanged
    1819 Geographic Information Systems (GIS) new
    1822 Geomechanics new
1824 Geomorphology (1625) 1824 Geomorphology: general (1625) revised, split into 1825, 1826
    1825 Geomorphology: fluvial (1625) new, split from 1824
    1826 Geomorphology: hillslope (1625) new, split from 1824
1827 Glaciology (1863) 1827 Glaciology (0736, 0776, 1863) unchanged, added xr
    1828 Groundwater hydraulics new
1829 Groundwater hydrology 1829 Groundwater hydrology unchanged
1831 Groundwater quality 1831 Groundwater quality unchanged
    1830 Groundwater/surface water interaction new
1832 Groundwater transport 1832 Groundwater transport unchanged
    1834 Human impacts new
1833 Hydroclimatology 1833 Hydroclimatology unchanged
    1835 Hydrogeophysics new
1836 Hydrologic budget (1655) 1836 Hydrological cycles and budgets (1218, 1655) revised, added xr
    1840 Hydrometeorology new
    1839 Hydrologic scaling new
    1838 Infiltration new
1842 Irrigation 1842 Irrigation unchanged
    1843 Land/atmosphere interactions (1218, 1631, 3322) new
1845 Limnology 1845 Limnology (0458, 4239, 4942) unchanged, added xr
    1846 Model calibration (3333) new
    1847 Modeling new
1848 Networks 1848 Monitoring networks revised
    1849 Numerical approximations and analysis new
    1850 Overland flow new
1851 Plant ecology 1851 Plant ecology (0476) unchanged, added xr
    1852 Plant uptake new
1854 Precipitation (3354) 1854 Precipitation (3354) unchanged
    1853 Precipitation-radar new
    1855 Remote sensing (1640) new
1857 Reservoirs (surface) 1857 Reservoirs (surface) unchanged
    1856 River channels (0483, 0744) new
    1858 Rocks: chemical properties new
    1859 Rocks: physical properties new
1860 Runoff and streamflow 1860 Streamflow revised
    1861 Sedimentation (4863) new, split from 1815
    1862 Sediment transport (4558) new
1863 Snow and ice (1827) 1863 Snow and ice (0736, 0738, 0776, 1827) unchanged, added xr
    1865 Soils (0486) new
1866 Soil moisture 1866 Soil moisture unchanged
1869 Stochastic processes 1869 Stochastic hydrology revised
1871 Surface water quality 1871 Surface water quality unchanged
    1872 Time series analysis (3270, 4277, 4475) new
    1873 Uncertainty assessment (3275) new
    1874 Ungaged basins new
1875 Unsaturated zone 1875 Vadose zone revised
    1876 Water budgets new
1878 Water/energy interactions 1878 Water/energy interactions (0495) unchanged, added xr
    1879 Watershed new
    1880 Water management (6334) new
1884 Water supply 1884 Water supply unchanged
1886 Weathering (1625) 1886 Weathering (0790, 1625) unchanged, added xr
1890 Wetlands 1890 Wetlands (0497) unchanged, added xr
1894 Instruments and techniques 1894 Instruments and techniques: modeling revised, split into 1894 and 1895
    1895 Instruments and techniques: monitoring new, split from 1894
1899 General or miscellaneous 1899 General or miscellaneous unchanged
2100 INTERPLANETARY PHYSICS 2100 INTERPLANETARY PHYSICS unchanged
    2101 Coronal mass ejections (7513) new
2102 Corotating streams 2102 Corotating streams unchanged
2104 Cosmic rays 2104 Cosmic rays unchanged
2109 Discontinuities 2109 Discontinuities (7811) unchanged, added xr
2111 Ejecta, driver gases, and magnetic clouds 2111 Ejecta, driver gases, and magnetic clouds unchanged
2114 Energetic particles, heliospheric (7514) 2114 Energetic particles (7514) revised, merged 2114, 2116, 2118
2116 Energetic particles, planetary     deleted, merged into 2114
2118 Energetic particles, solar     deleted, merged into 2114
2124 Heliopause and solar wind termination 2124 Heliopause and solar wind termination unchanged
    2126 Heliosphere/interstellar medium interactions new
2129 Interplanetary dust 2129 Interplanetary dust unchanged
2134 Interplanetary magnetic fields 2134 Interplanetary magnetic fields unchanged
2139 Interplanetary shocks 2139 Interplanetary shocks unchanged
2144 Interstellar gas 2144 Interstellar gas unchanged
2149 MHD waves and turbulence 2149 MHD waves and turbulence (2752, 6050, 7836) unchanged, added xr
2151 Neutral particles 2151 Neutral particles (7837) unchanged, added xr
2152 Pickup ions 2152 Pickup ions unchanged
2154 Planetary bow shocks 2154 Planetary bow shocks unchanged
2159 Plasma waves and turbulence 2159 Plasma waves and turbulence unchanged
2162 Solar cycle variations (7536) 2162 Solar cycle variations (7536) unchanged
2164 Solar wind plasma 2164 Solar wind plasma unchanged
2169 Sources of the solar wind 2169 Solar wind sources revised
2194 Instruments and techniques 2194 Instruments and techniques unchanged
2199 General or miscellaneous 2199 General or miscellaneous unchanged
2400 IONOSPHERE 2400 IONOSPHERE (6929) unchanged, added xr
2403 Active experiments 2403 Active experiments unchanged
2407 Auroral ionosphere (2704) 2407 Auroral ionosphere (2704) unchanged
2409 Current systems (2708) 2409 Current systems (2721) unchanged, revised xr
2411 Electric fields (2712) 2411 Electric fields (2712) unchanged
2415 Equatorial ionosphere 2415 Equatorial ionosphere unchanged
2419 Ion chemistry and composition (0335) 2419 Ion chemistry and composition (0335) unchanged
2423 Ionization mechanisms 2423 Ionization processes (7823) unchanged, added xr
2427 Ionosphere/atmosphere interactions (0335) 2427 Ionosphere/atmosphere interactions (0335) unchanged
2431 Ionosphere/magnetosphere interactions (2736) 2431 Ionosphere/magnetosphere interactions (2736) unchanged
2435 Ionospheric disturbances 2435 Ionospheric disturbances unchanged
2437 Ionospheric dynamics 2437 Ionospheric dynamics unchanged
2439 Ionospheric irregularities 2439 Ionospheric irregularities unchanged
    2441 Ionospheric storms (7949) new
    2442 Meteor-trail physics new
2443 Midlatitude ionosphere 2443 Midlatitude ionosphere unchanged
2447 Modeling and forecasting 2447 Modeling and forecasting unchanged
2451 Particle acceleration 2451 Particle acceleration unchanged
2455 Particle precipitation 2455 Particle precipitation unchanged
2459 Planetary ionospheres (5435, 5729, 6026, 6027, 6028) 2459 Planetary ionospheres (5435, 5729, 6026) unchanged, added xr
    2461 Plasma interactions with dust and aerosols (7849) new
2463 Plasma convection 2463 Plasma convection (2760) unchanged, added xr
2467 Plasma temperature and density 2467 Plasma temperature and density unchanged
2471 Plasma waves and instabilities 2471 Plasma waves and instabilities (2772) unchanged, added xr
2475 Polar cap ionosphere 2475 Polar cap ionosphere unchanged
2479 Solar radiation and cosmic ray effects 2479 Solar radiation and cosmic ray effects unchanged
2481 Topside ionosphere 2481 Topside ionosphere unchanged
2483 Wave/particle interactions 2483 Wave/particle interactions (7867) unchanged, added xr
2487 Wave propagation (6934) 2487 Wave propagation (0689, 3285, 4275, 4455, 6934) unchanged, added xr
2494 Instruments and techniques 2494 Instruments and techniques unchanged
2499 General or miscellaneous 2499 General or miscellaneous unchanged
2700 MAGNETOSPHERIC PHYSICS 2700 MAGNETOSPHERIC PHYSICS (6939) unchanged, added xr
2704 Auroral phenomena (2407) 2704 Auroral phenomena (2407) unchanged
    2706 Cusp new
2708 Current systems (2409)     deleted, merged into 2721
2712 Electric fields (2411) 2712 Electric fields (2411) unchanged
2716 Energetic particles, precipitating 2716 Energetic particles: precipitating unchanged
2720 Energetic particles, trapped 2720 Energetic particles: trapped unchanged
    2721 Field-aligned currents and current systems (2409) new, includes 2708
2722 Forecasting 2722 Forecasting (7924, 7964) unchanged, added xr
    2723 Magnetic reconnection (7526, 7835) new
2724 Magnetopause, cusp, and boundary layers 2724 Magnetopause and boundary layers split into 2706 and 2724
2728 Magnetosheath 2728 Magnetosheath unchanged
2730 Magnetosphere: inner 2730 Magnetosphere: inner unchanged
2731 Magnetosphere: outer 2731 Magnetosphere: outer unchanged
2732 Magnetosphere interactions with satellites and rings 2732 Magnetosphere interactions with satellites and rings unchanged
2736 Magnetosphere/ionosphere interactions 2736 Magnetosphere/ionosphere interactions (2431) unchanged, added xr
2740 Magnetospheric configuration and dynamics 2740 Magnetospheric configuration and dynamics unchanged
2744 Magnetotail 2744 Magnetotail unchanged
2748 Magnetotail boundary layers 2748 Magnetotail boundary layers unchanged
2752 MHD waves and instabilities 2752 MHD waves and instabilities (2149, 6050, 7836) unchanged, added xr
2753 Numerical modeling 2753 Numerical modeling unchanged
2756 Planetary magnetospheres (5443, 5737, 6030) 2756 Planetary magnetospheres (5443, 5737, 6033) unchanged, revised xr
2760 Plasma convection 2760 Plasma convection (2463) unchanged, added xr
2764 Plasma sheet 2764 Plasma sheet unchanged
2768 Plasmasphere 2768 Plasmasphere unchanged
2772 Plasma waves and instabilities 2772 Plasma waves and instabilities (2471) unchanged, added xr
2776 Polar cap phenomena 2776 Polar cap phenomena unchanged
    2774 Radiation belts new
2778 Ring current 2778 Ring current unchanged
2780 Solar wind interactions with unmagnetized bodies 2780 Solar wind interactions with unmagnetized bodies unchanged
2784 Solar wind/magnetosphere interactions 2784 Solar wind/magnetosphere interactions unchanged
2788 Storms and substorms 2788 Magnetic storms and substorms (7954) revised, added xr
    2790 Substorms new
2794 Instruments and techniques 2794 Instruments and techniques unchanged
2799 General or miscellaneous 2799 General or miscellaneous unchanged
3000 MARINE GEOLOGY AND GEOPHYSICS 3000 MARINE GEOLOGY AND GEOPHYSICS unchanged
    3001 Back-arc basin processes new
    3002 Continental shelf and slope processes (4219) new
    3004 Gas and hydrate systems new
3005 Geomagnetism and paleomagnetism 3005 Marine magnetics and paleomagnetics (1550) revised
    3006 Marine electromagnetics new
3010 Gravity 3010 Gravity and isostasy (1218, 1222) revised, added xr
3015 Heat flow (benthic) and hydrothermal processes 3015 Heat flow (benthic) revised, split into 3015 and 3017
    3017 Hydrothermal systems (0450, 1034, 3616, 4832, 8135, 8424) new, split from 3015
3020 Littoral processes 3020 Littoral processes unchanged
    3021 Marine hydrogeology new
3022 Marine sediments--processes and transport 3022 Marine sediments: processes and transport unchanged
3025 Marine seismics (0935) 3025 Marine seismics (0935, 7294) unchanged, added xr
3030 Micropaleontology 3030 Micropaleontology (0459, 4944) unchanged, added xr
3035 Midocean ridge processes 3035 Midocean ridge processes unchanged
    3036 Ocean drilling new
    3037 Oceanic hotspots and intraplate volcanism new
    3038 Oceanic plateaus and microcontinents new
    3039 Oceanic transform and fracture zone processes new
3040 Plate tectonics (8150, 8155, 8157, 8158) 3040 Plate tectonics (8150, 8155, 8157, 8158) unchanged
    3042 Ophiolites (8140) new
3045 Seafloor morphology and bottom photography 3045 Seafloor morphology, geology, and geophysics revised
    3050 Ocean observatories and experiments new
    3060 Subduction zone processes (1031, 3613, 8170, 8413) new
    3070 Submarine landslides new
    3075 Submarine tectonics and volcanism new
    3080 Submergence instruments: ROV, AUV, submersibles new
3094 Instruments and techniques 3094 Instruments and techniques  
3099 General or miscellaneous 3099 General or miscellaneous  
3200 MATHEMATICAL GEOPHYSICS 3200 MATHEMATICAL GEOPHYSICS (0500, 4400, 7833) unchanged, added xr
    3205 Fourier analysis (3255) new
3210 Modeling     deleted
    3215 Instability analysis new
3220 Nonlinear dynamics     revised, moved to new category 4400
3260 Inverse theory 3260 Inverse theory unchanged
    3225 Numerical approximations and analysis (4260) new
3230 Numerical solutions     deleted
    3235 Persistence, memory, correlations, clustering (3265, 7857) new
    3238 Prediction (3245, 4263) new
3240 Chaos     moved to 4420
    3245 Probabilistic forecasting (3238) new
3250 Fractals and multifractals     moved to 4440
    3252 Spatial analysis (0500) new
    3255 Spectral analysis (3205, 3280) new
    3265 Stochastic processes (3235, 4468, 4475, 7857) new
    3270 Time series analysis (1872, 4277, 4475) new
    3275 Uncertainty quantification (1873) new
    3280 Wavelet transform (3255, 4455) new
    3285 Wave propagation (0689, 2487, 4275, 4455, 6934) new
    3294 Instruments and techniques new
3299 General or miscellaneous 3299 General or miscellaneous unchanged
3300 METEOROLOGY and ATMOSPHERIC DYNAMICS 3300 ATMOSPHERIC PROCESSES revised
3304 Atmospheric electricity 3304 Atmospheric electricity unchanged
    3305 Climate change and variability (1616, 1635, 3309, 4215, 4513) new
3307 Boundary layer processes 3307 Boundary layer processes unchanged
3309 Climatology (1620) 3309 Climatology (1616, 1620, 3305, 4215, 8408) unchanged, added xr
    3311 Clouds and aerosols new
    3310 Clouds and cloud feedbacks new
3314 Convective processes 3314 Convective processes unchanged
    3315 Data assimilation new
3319 General circulation 3319 General circulation (1223) unchanged, added xr
3322 Land/atmosphere interactions 3322 Land/atmosphere interactions (1218, 1631, 1843) unchanged, added xr
3324 Lightning 3324 Lightning unchanged
3329 Mesoscale meteorology 3329 Mesoscale meteorology unchanged
3332 Mesospheric dynamics 3332 Mesospheric dynamics unchanged
    3333 Model calibration (1846) new
3334 Middle atmosphere dynamics (0341, 0342) 3334 Middle atmosphere dynamics (0341, 0342) unchanged
3337 Numerical modeling and data assimilation 3337 Global climate models (1626, 4928) revised, added xr
3339 Ocean/atmosphere interactions (0312, 4504) 3339 Ocean/atmosphere interactions (0312, 4504) unchanged
3344 Paleoclimatology 3344 Paleoclimatology (0473, 4900) unchanged, added xr
3346 Planetary meteorology (5445, 5739) 3346 Planetary meteorology (5445, 5739) unchanged
3349 Polar meteorology 3349 Polar meteorology unchanged
3354 Precipitation (1854) 3354 Precipitation (1854) unchanged
3359 Radiative processes 3359 Radiative processes unchanged
    3355 Regional modeling new
3360 Remote sensing 3360 Remote sensing unchanged
3362 Stratosphere/troposphere interactions 3362 Stratosphere/troposphere interactions unchanged
3364 Synoptic-scale meteorology 3364 Synoptic-scale meteorology unchanged
3367 Theoretical modeling 3367 Theoretical modeling unchanged
3369 Thermospheric dynamics (0358) 3369 Thermospheric dynamics (0358) unchanged
3374 Tropical meteorology 3374 Tropical meteorology unchanged
3379 Turbulence 3379 Turbulence (4490) unchanged, added xr
3384 Waves and tides 3384 Acoustic-gravity waves revised, split into 3384 and 3389
    3389 Tides and planetary waves new, split from 3384
3394 Instruments and techniques 3394 Instruments and techniques unchanged
3399 General or miscellaneous 3399 General or miscellaneous unchanged
3600 MINERALOGY and PETROLOGY 3600 MINERALOGY and PETROLOGY unchanged
    3610 Geochemical modeling (1009, 8410) new
    3611 Thermodynamics (0766, 1011, 8411) new
    3612 Reactions and phase equilibria (1012, 8412) new
    3613 Subduction zone processes (1031, 3060, 8170, 8413) new
    3614 Mid-oceanic ridge processes (1032, 8416) new
    3615 Intra-plate processes (1033, 8415) new
    3616 Hydrothermal systems (0450, 1034, 3017, 4832, 8135, 8424) new
    3617 Alteration and weathering processes (1039) new
    3618 Magma chamber processes (1036) new
    3619 Magma genesis and partial melting (1037) new
    3621 Mantle processes (1038) new
3620 Crystal chemistry 3620 Mineral and crystal chemistry (1042) revised, added xr
3625 Descriptive mineralogy 3625 Petrography, microstructures, and textures revised
3630 Experimental mineralogy and petrology 3630 Experimental mineralogy and petrology unchanged
3640 Igneous petrology 3640 Igneous petrology unchanged
    3641 Extrusive structures and rocks new
    3642 Intrusive structures and rocks new
    3643 Layered magma chambers new
3655 Major element composition     deleted
3660 Metamorphic petrology 3660 Metamorphic petrology unchanged
    3651 Thermobarometry new
    3652 Pressure-temperature-time paths new
    3653 Fluid flow new
    3654 Ultra-high pressure metamorphism new
    3656 Ultra-high temperature metamorphism new
3662 Meteorites 3662 Meteorite mineralogy and petrology (1028, 6240) revised, added xr
3665 Mineral occurrences and deposits 3665 Mineral occurrences and deposits unchanged
3670 Minor and trace element composition     deleted
3672 Planetary mineralogy and petrology (5410) 3672 Planetary mineralogy and petrology (5410) unchanged
3675 Sedimentary petrology 3675 Sedimentary petrology unchanged
    3690 Field relationships (1090, 8486) new
3694 Instruments and techniques 3694 Instruments and techniques unchanged
3699 General or miscellaneous 3699 General or miscellaneous unchanged
3900 MINERAL PHYSICS 3900 MINERAL PHYSICS unchanged
3902 Creep and deformation 3902 Creep and deformation unchanged
3904 Defects 3904 Defects unchanged
3909 Elasticity and anelasticity 3909 Elasticity and anelasticity unchanged
3914 Electrical properties 3914 Electrical properties unchanged
3919 Equations of state 3919 Equations of state unchanged
3924 High-pressure behavior 3924 High-pressure behavior unchanged
3929 NMR, Mossbauer spectroscopy, and other magnetic techniques 3929 NMR, Mossbauer spectroscopy, and other magnetic techniques unchanged
3934 Optical, infrared, and Raman spectroscopy 3934 Optical, infrared, and Raman spectroscopy unchanged
3939 Physical thermodynamics 3939 Physical thermodynamics unchanged
3944 Shock wave experiments 3944 Shock wave experiments unchanged
3947 Surfaces and interfaces 3947 Surfaces and interfaces unchanged
3949 Thermal expansivity 3949 Thermal expansivity unchanged
3954 X-ray, neutron, and electron spectroscopy and diffraction 3954 X-ray, neutron, and electron spectroscopy and diffraction unchanged
3994 Instruments and techniques 3994 Instruments and techniques unchanged
3999 General or miscellaneous 3999 General or miscellaneous unchanged
4200 OCEANOGRAPHY: GENERAL 4200 OCEANOGRAPHY: GENERAL unchanged
4203 Analytical modeling 4203 Analytical modeling and laboratory experiments revised
4207 Arctic and Antarctic oceanography 4207 Arctic and Antarctic oceanography (9310, 9315) unchanged, added xr
4211 Benthic boundary layers 4211 Benthic boundary layers unchanged
4215 Climate and interannual variability (3309) 4215 Climate and interannual variability (1616, 1635, 3305, 3309, 4513) unchanged, added xr
    4217 Coastal processes new
4219 Continental shelf processes 4219 Continental shelf and slope processes (3002) revised, added xr
    4220 Coral reef systems (4916) new
4221 Dendrochronology     moved to 4920
4223 Descriptive and regional oceanography 4223 Descriptive and regional oceanography unchanged
4227 Diurnal, seasonal, and annual cycles 4227 Diurnal, seasonal, and annual cycles (0438) unchanged, added xr
4231 Equatorial oceanography 4231 Equatorial oceanography unchanged
4235 Estuarine processes 4235 Estuarine processes (0442) unchanged, added xr
4239 Limnology 4239 Limnology (0458, 1845, 4942) unchanged, added xr
4243 Marginal and semi-enclosed seas 4243 Marginal and semi-enclosed seas unchanged
4247 Marine meteorology 4247 Marine meteorology unchanged
4251 Marine pollution 4251 Marine pollution (0345, 0478) unchanged, merged with 4857, added xr
4255 Numerical modeling 4255 Numerical modeling (0545, 0560) unchanged, added xr
4259 Ocean acoustics 4259 Ocean acoustics unchanged
    4260 Ocean data assimilation and reanalysis (3225) new
    4262 Ocean observing systems new
4263 Ocean prediciction 4263 Ocean predictability and prediction (3238) revised, added xr
    4264 Ocean optics (0649) moved from 4552
4267 Paleoceanography     moved to new category 4900
4271 Physical and chemical properties of seawater 4271 Physical and chemical properties of seawater unchanged
    4273 Physical and biogeochemical interactions new
4275 Remote sensing and electromagnetic processes (0689) 4275 Remote sensing and electromagnetic processes (0689, 2487, 3285, 4455, 6934) unchanged, added xr
    4277 Time series experiments (1872, 3270, 4475) new
4279 Upwelling and convergences 4279 Upwelling and convergences (4964) unchanged
4283 Water masses 4283 Water masses unchanged
4294 Instruments and techniques 4294 Instruments and techniques unchanged
4299 General or miscellaneous 4299 General or miscellaneous unchanged
  4400 NONLINEAR GEOPHYSICS (3200, 6944, 7839) new category, was 3220
    4410 Bifurcations and attractors new
    4415 Cascades new
    4420 Chaos (7805) new, moved from 3240, added xr
    4425 Critical phenomena new
    4430 Complex systems new
    4435 Emergent phenomena new
    4440 Fractals and multifractals new, moved from 3250
    4445 Nonlinear differential equations new
    4450 Nonlinear maps new
    4455 Nonlinear waves, shock waves, solitons (0689, 2487, 3280, 3285, 4275, 6934, 7851, 7852) new
    4460 Pattern formation new
    4465 Phase transitions new
    4468 Probability distributions, heavy and fat-tailed (3265) new
    4470 Renormalization group methods new
    4475 Scaling: spatial and temporal (1872, 3270, 4277) new
    4480 Self-organized criticality new
    4485 Self-organization new
    4490 Turbulence (3379, 4568, 7863) new
    4494 Instruments and techniques new
    4499 General or miscellaneous new
4500 OCEANOGRAPHY: PHYSICAL 4500 OCEANOGRAPHY: PHYSICAL unchanged
4504 Air/sea interactions (0312) 4504 Air/sea interactions (0312, 3339) unchanged, added xr
4506 Capillary waves 4506 Capillary waves unchanged
4508 Coriolis effects 4508 Coriolis effects unchanged
4512 Currents 4512 Currents unchanged
    4513 Decadal ocean variability (1616, 1635, 3305, 4215) new
    4515 Deep recirculations new
4516 Eastern boundary currents 4516 Eastern boundary currents unchanged
4520 Eddies and mesoscale processes 4520 Eddies and mesoscale processes unchanged
4522 El Nino 4522 ENSO (4922) revised, added xr
4524 Fine structure and microstructure 4524 Fine structure and microstructure unchanged
4528 Fronts and jets 4528 Fronts and jets unchanged
4532 General circulation 4532 General circulation (1218, 1222) unchanged, added xr
    4534 Hydrodynamic modeling new
4536 Hydrography 4536 Hydrography and tracers revised
4540 Ice mechanics and air/sea/ice exchange processes 4540 Ice mechanics and air/sea/ice exchange processes (0700, 0750, 0752, 0754) unchanged, added xr
4544 Internal and inertial waves 4544 Internal and inertial waves unchanged
4546 Nearshore processes 4546 Nearshore processes unchanged
4548 Ocean fog and aerosols 4548 Ocean fog split into 4548 and 4801
    4550 Ocean influence of Earth rotation (1223) new
4552 Ocean optics     moved to 4264
    4553 Overflows new
    4554 Planetary waves new
4556 Sea level variations 4556 Sea level: variations and mean (1222, 1225, 1641) revised, added xr
4558 Sediment transport 4558 Sediment transport (1862) unchanged, added xr
4560 Surface waves and tides (1255) 4560 Surface waves and tides (1222) unchanged, revised xr
    4562 Topographic/bathymetric interactions new
4564 Tsunamis and storm surges 4564 Tsunamis and storm surges unchanged
4568 Turbulence, diffusion, and mixing processes 4568 Turbulence, diffusion, and mixing processes (4490) unchanged, added xr
4572 Upper ocean processes 4572 Upper ocean and mixed layer processes revised
4576 Western boundary currents 4576 Western boundary currents unchanged
4594 Instruments and techniques 4594 Instruments and techniques unchanged
4599 General or miscellaneous 4599 General or miscellaneous unchanged
4800 OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL 4800 OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL (0460) unchanged, added xr
4801 Aerosols (0305) 4801 Aerosols (0305, 4906) unchanged, added xr
    4803 Analytical chemistry new
4803 Bacteria     deleted, merged into 4840
4802 Anoxic environments 4802 Anoxic environments (0404, 1803, 4834, 4902) unchanged, added xr
4804 Benthic processes, benthos 4804 Benthic processes, benthos (0408) unchanged, added xr
4805 Biogeochemical cycles (1615) 4805 Biogeochemical cycles, processes, and modeling (0412, 0414, 0793, 1615, 4912) revised, added xr
4806 Carbon cycling 4806 Carbon cycling (0428) unchanged, added xr
4807 Chemical speciation and complexation 4807 Chemical speciation and complexation unchanged
4808 Chemical tracers 4808 Chemical tracers unchanged
    4811 Chemosynthesis new
4809 Colloids 4809 Colloids unchanged
4810 Corrosion     deleted, merged into 4851
    4813 Ecological prediction new
4815 Ecosystems, structure and dynamics 4815 Ecosystems, structure, dynamics, and modeling (0439) revised, added xr
4817 Food chains 4817 Food webs, structure, and dynamics (0491) revised, merged with 4880, added xr
4820 Gases 4820 Gases unchanged
4825 Geochemistry 4825 Geochemistry unchanged
4830 Higher marine organisms 4830 Higher trophic levels revised
4832 Hydrothermal systems 4832 Hydrothermal systems (0450, 1034, 3017, 3616, 8135, 8424) unchanged, added xr
4834 Hypoxic environments 4834 Hypoxic environments (0404) unchanged, added xr
4835 Inorganic marine chemistry 4835 Marine inorganic chemistry (1050) revised, added xr
4840 Microbiology 4840 Microbiology and microbial ecology (0465) revised, includes 4803, added xr
4842 Modeling     deleted
    4843 Natural products chemistry new
4845 Nutrients and nutrient cycling 4845 Nutrients and nutrient cycling (0470, 1050) unchanged, added xr
4847 Optics     moved to 4264
4850 Organic marine chemistry 4850 Marine organic chemistry (0470, 1050) revised, added xr
4851 Oxidation/reduction reactions 4851 Oxidation/reduction reactions (0471) unchanged, added xr
4852 Photochemistry 4852 Photochemistry unchanged
4853 Photosynthesis 4853 Photosynthesis unchanged
4854 Physicochemical properties 4854 Physical chemistry revised
4855 Plankton 4855 Phytoplankton split into 4855 and 4890
4857 Pollution     deleted, merged with 4251
    4858 Population dynamics and ecology new
4860 Radioactivity and radioisotopes 4860 Radioactivity and radioisotopes unchanged
4863 Sedimentation 4863 Sedimentation (1861) unchanged, added xr
4866 Sorptive scavenging 4866 Sorptive scavenging unchanged
4870 Stable isotopes 4870 Stable isotopes (0454, 1041) unchanged, added xr
    4872 Symbiosis new
4875 Trace elements 4875 Trace elements (0489) unchanged, added xr
4880 Trophodynamics     deleted, merged into 4817
4885 Weathering     deleted
    4890 Zooplankton new, split from 4855
4894 Instruments and techniques 4894 Instruments, sensors, and techniques revised
4899 General or miscellaneous 4899 General or miscellaneous unchanged
  4900 PALEOCEANOGRAPHY (0473, 3344) new, was 4267
    4901 Abrupt/rapid climate change (1605) new
    4902 Anthropogenic effects (1803, 4802) new
    4904 Atmospheric transport and circulation new
    4906 Aerosols (0305, 4801) new
    4908 Albedo new
    4910 Astronomical forcing new
    4912 Biogeochemical cycles, processes, and modeling (0412, 0414, 0793, 1615, 4805) new
    4914 Continental climate records new
    4916 Corals (4220) new
    4918 Cosmogenic isotopes (1150) new
    4920 Dendrochronology moved from 4221
    4922 El Nino (4522) new
    4924 Geochemical tracers new
    4926 Glacial new
    4928 Global climate models (1626, 3337) new
    4930 Greenhouse gases new
    4932 Ice cores (0724) new
    4934 Insolation forcing new
    4936 Interglacial new
    4938 Interhemispheric phasing new
    4940 Isotopic stage new
    4942 Limnology (0458, 1845, 4239) new
    4944 Micropaleontology (0459, 3030) new
    4946 Milankovitch theory new
    4948 Paleocene/Eocene thermal maximum new
    4950 Paleoecology new
    4952 Palynology new
    4954 Sea surface temperature new
    4958 Speleothems new
    4960 Stadial new
    4962 Thermohaline new
    4964 Upwelling (4279) new
    4994 Instruments and techniques new
    4999 General or miscellaneous new
5100 PHYSICAL PROPERTIES OF ROCKS 5100 PHYSICAL PROPERTIES OF ROCKS unchanged
5102 Acoustic properties 5102 Acoustic properties unchanged
5104 Fracture and flow 5104 Fracture and flow unchanged
5109 Magnetic and electrical properties 5109 Magnetic and electrical properties (0925) unchanged, added xr
5112 Microstructure 5112 Microstructure unchanged
5114 Permeability and porosity 5114 Permeability and porosity unchanged
5120 Plasticity, diffusion, and creep 5120 Plasticity, diffusion, and creep unchanged
5134 Thermal properties 5134 Thermal properties unchanged
5139 Transport properties 5139 Transport properties unchanged
5144 Wave attenuation 5144 Wave attenuation unchanged
5194 Instruments and techniques 5194 Instruments and techniques unchanged
5199 General or miscellaneous 5199 General or miscellaneous unchanged
  5200 PLANETARY SCIENCES: ASTROBIOLOGY new
    5205 Formation of stars and planets new
    5210 Planetary atmospheres, clouds, and hazes (0343) new
    5215 Origin of life new
    5220 Hydrothermal systems and weathering on other planets new
    5225 Early environment of Earth new
5400 PLANETOLOGY: SOLID SURFACE PLANETS 5400 PLANETARY SCIENCES: SOLID SURFACE PLANETS revised
5405 Atmospheres--composition and chemistry 5405 Atmospheres (0343, 1060) revised, merged 5405, 5407, and 5409, added xr
5407 Atmospheres--evolution     deleted, merged into 5405
5409 Atmospheres--structure and dynamics     deleted, merged into 5405
    5408 Aurorae and airglow new
5410 Composition 5410 Composition (1060, 3672) unchanged, added xr
5415 Erosion and weathering 5415 Erosion and weathering unchanged
5416 Glaciation 5416 Glaciation unchanged
5417 Gravitational fields (1227) 5417 Gravitational fields (1221) unchanged, revised xr
5418 Heat flow 5418 Heat flow unchanged
    5419 Hydrology and fluvial processes new
    5422 Ices new
5420 Impact phenomena (includes cratering) 5420 Impact phenomena, cratering (6022, 8136) revised, added xr
5421 Interactions with particles and fields 5421 Interactions with particles and fields unchanged
5430 Interiors (8147) 5430 Interiors (8147) unchanged
5435 Ionospheres (2459) 5435 Ionospheres (2459) unchanged
5440 Magnetic fields and magnetism 5440 Magnetic fields and magnetism unchanged
5443 Magnetospheres (2756) 5443 Magnetospheres (2756) unchanged
5445 Meteorology (3346) 5445 Meteorology (3346) unchanged
5450 Orbital and rotational dynamics 5450 Orbital and rotational dynamics (1221) unchanged, added xr
5455 Origin and evolution 5455 Origin and evolution unchanged
5460 Physical properties of materials 5460 Physical properties of materials unchanged
5462 Polar regions 5462 Polar regions unchanged
5464 Remote sensing 5464 Remote sensing unchanged
5465 Rings and dust 5465 Rings and dust unchanged
5470 Surface materials and properties 5470 Surface materials and properties unchanged
5475 Tectonics (8149) 5475 Tectonics (8149) unchanged
5480 Volcanism (8450) 5480 Volcanism (6063, 8148, 8450) unchanged, added xr
5494 Instruments and techniques 5494 Instruments and techniques unchanged
5499 General or miscellaneous 5499 General or miscellaneous unchanged
5700 PLANETOLOGY: FLUID PLANETS 5700 PLANETARY SCIENCES: FLUID PLANETS revised
5704 Atmospheres--composition and chemistry 5704 Atmospheres (0343, 1060) revised, merged 5704, 5705, and 5707, added xr
5705 Atmospheres--evolution     deleted, merged into 5704
5707 Atmospheres--structure and dynamics     deleted, merged into 5704
    5706 Aurorae new
5709 Composition 5709 Composition (1060) unchanged, added xr
5714 Gravitational fields (1227) 5714 Gravitational fields (1221) unchanged, revised xr
5717 Impact phenomena     deleted
5719 Interactions with particles and fields 5719 Interactions with particles and fields unchanged
5724 Interiors (8147) 5724 Interiors (8147) unchanged
5729 Ionospheres (2459) 5729 Ionospheres (2459) unchanged
5734 Magnetic fields and magnetism 5734 Magnetic fields and magnetism unchanged
5737 Magnetospheres (2756) 5737 Magnetospheres (2756) unchanged
5739 Meteorology (3346) 5739 Meteorology (3346) unchanged
5744 Orbital and rotational dynamics 5744 Orbital and rotational dynamics (1221) unchanged, added xr
5749 Origin and evolution 5749 Origin and evolution unchanged
    5754 Polar regions new
5757 Remote sensing     deleted
5759 Rings and dust 5759 Rings and dust unchanged
5764 Surfaces     deleted
5770 Tidal forces 5770 Tidal forces unchanged
5780 Tori and exospheres 5780 Tori and exospheres unchanged
5794 Instruments and techniques 5794 Instruments and techniques unchanged
5799 General or miscellaneous 5799 General or miscellaneous unchanged
6000 PLANETOLOGY: COMETS AND SMALL BODIES 6000 PLANETARY SCIENCES: COMETS AND SMALL BODIES revised
6005 Atmospheres--composition and chemistry 6005 Atmospheres (1060) revised, merged 6005, 6006, 6007, added xr
6006 Atmospheres--evolution     deleted, merged into 6005
6007 Atmospheres--structure and dynamics     deleted, merged into 6005
    6009 Aurorae, airglow, and X-ray emission new
6008 Composition 6008 Composition (1060) unchanged, added xr
6015 Dust 6015 Dust unchanged
    6017 Erosion and weathering new
6019 Gravitational fields 6019 Gravitational fields (1221) unchanged, added xr
6020 Ice 6020 Ices revised
6022 Impact phenomena 6022 Impact phenomena (5420, 8136) unchanged, added xr
6025 Interactions with solar wind plasma and fields 6025 Interactions with solar wind plasma and fields unchanged
    6023 Comets: dust tails and trails (6210) new
    6024 Interiors (8147) new
6026 Ionospheres--composition and chemistry 6026 Ionospheres (2459) revised, merged 6026, 6027, and 6028
6027 Ionospheres--evolution     deleted, merged into 6026
6028 Ionospheres--structure and dynamics     deleted, merged into 6026
6030 Magnetic fields and magnetism 6030 Magnetic fields and magnetism unchanged
    6033 Magnetospheres (2756) new
6035 Orbital and rotational dynamics 6035 Orbital and rotational dynamics unchanged
6040 Origin and evolution 6040 Origin and evolution unchanged
6045 Physics and chemistry of materials 6045 Physics and chemistry of materials unchanged
6050 Plasma and MHD instabilities 6050 Plasma and MHD instabilities (2149, 2752, 7836) unchanged, added xr
6055 Surfaces and interiors 6055 Surfaces revised
6060 Radiation and spectra 6060 Radiation and chemistry revised
6061 Remote sensing     deleted
    6063 Volcanism (5480, 8450) new
6094 Instruments and techniques 6094 Instruments and techniques unchanged
6099 General or miscellaneous 6099 General or miscellaneous unchanged
6200 PLANETOLOGY: SOLAR SYSTEM OBJECTS 6200 PLANETARY SCIENCES: SOLAR SYSTEM OBJECTS revised
6205 Asteroids and meteoroids 6205 Asteroids revised
    6206 Asteroids: satellites new
6207 Comparative planetology 6207 Comparative planetology unchanged
6210 Comets 6210 Comets (6023) unchanged, added xr
    6211 Centaurs new
6213 Dust 6213 Dust unchanged
6215 Extraterrestrial materials     deleted
6218 Jovian satellites 6218 Jovian satellites unchanged
    6219 Io new
    6221 Europa new
    6222 Ganymede new
    6223 Callisto new
6220 Jupiter 6220 Jupiter unchanged
    6224 Kuiper belt objects new
6225 Mars 6225 Mars unchanged
6230 Martian satellites 6230 Martian satellites unchanged
6235 Mercury 6235 Mercury unchanged
6240 Meteorites and tektites 6240 Meteorites and tektites (1028, 3662) unchanged, added xr
6245 Meteors 6245 Meteors unchanged
6250 Moon (1221) 6250 Moon (1221) unchanged
6255 Neptune 6255 Neptune unchanged
6260 Neptunian satellites 6260 Neptunian satellites unchanged
    6261 Triton new
6265 Planetary rings 6265 Planetary rings unchanged
6270 Pluto and satellites 6270 Pluto and satellites unchanged
6275 Saturn 6275 Saturn unchanged
6280 Saturnian satellites 6280 Saturnian satellites unchanged
    6281 Titan new
    6285 Trans-Neptunian objects new
6290 Uranian satellites 6290 Uranian satellites unchanged
6293 Uranus 6293 Uranus unchanged
6295 Venus 6295 Venus unchanged
6296 Extra-solar planets 6296 Extra-solar planets new
6297 Instruments and techniques 6297 Instruments and techniques unchanged
6299 General or miscellaneous 6299 General or miscellaneous unchanged
6300 POLICY SCIENCES 6300 POLICY SCIENCES (7964) unchanged, added xr
6304 Benefit-cost analysis 6304 Benefit-cost analysis unchanged
6309 Decision making under uncertainty 6309 Decision making under uncertainty unchanged
6314 Demand estimation 6314 Demand estimation unchanged
6319 Institutions 6319 Institutions unchanged
6324 Legislation and regulations 6324 Legislation and regulations (6615) unchanged, added xr
6329 Project evaluation 6329 Project evaluation unchanged
6334 Regional planning 6334 Regional planning (1880) unchanged, added xr
6339 System design 6339 System design unchanged
6344 System operation and management 6344 System operation and management unchanged
6349 General or miscellaneous 6349 General or miscellaneous unchanged
6600 PUBLIC ISSUES 6600 PUBLIC ISSUES unchanged
6605 Education     moved to new category 0800
6610 Funding 6610 Funding unchanged
6615 Legislation and regulations 6615 Legislation and regulations (6324) unchanged, added xr
6620 Science policy 6620 Science policy (0485) unchanged, added xr
6630 Workforce 6630 Workforce unchanged
6699 General or miscellaneous 6699 General or miscellaneous unchanged
6900 RADIO SCIENCE 6900 RADIO SCIENCE unchanged
6904 Atmospheric propagation     deleted
6909 Electromagnetic metrology     deleted
6914 Electromagnetic noise and interference 6914 Electromagnetic noise and interference unchanged
6919 Electro-optics     deleted
6924 Interferometry 6924 Interferometry (1207, 1209, 1242) unchanged, added xr
6929 Ionospheric physics (2409) 6929 Ionospheric physics (1240, 2400) unchanged, revised xr
6934 Ionospheric propagation (2487) 6934 Ionospheric propagation (0689, 2487, 3285, 4275, 4455) unchanged, added xr
6939 Magnetospheric physics 6939 Magnetospheric physics (2700) unchanged, added xr
6944 Nonlinear phenomena 6944 Nonlinear phenomena (4400, 7839) unchanged, added xr
6949 Radar astronomy 6949 Radar astronomy unchanged
6952 Radar atmospheric physics 6952 Radar atmospheric physics (1220) unchanged, added xr
6954 Radio astronomy 6954 Radio astronomy unchanged
6959 Radio oceanography 6959 Radio oceanography (1222) unchanged, added xr
6964 Radio wave propagation 6964 Radio wave propagation unchanged
6969 Remote sensing 6969 Remote sensing unchanged
6974 Signal processing 6974 Signal processing (0674) unchanged, added xr
6979 Space and satellite communication 6979 Space and satellite communication unchanged
6982 Tomography and imaging 6982 Tomography and imaging (7270, 8180) unchanged, added xr
6984 Waves in plasma 6984 Waves in plasma (7867) unchanged, added xr
6994 Instruments and techniques 6994 Instruments and techniques (1241) unchanged, added xr
6999 General or miscellaneous 6999 General or miscellaneous unchanged
7200 SEISMOLOGY 7200 SEISMOLOGY unchanged
7203 Body wave propagation 7203 Body waves revised
7205 Continental crust (1242) 7205 Continental crust (1219) unchanged, revised xr
7207 Core and mantle 7207 Core (1212, 1213, 8124) split into 7207 and 7208, added xr
    7208 Mantle (1212, 1213, 8124) new, split from 7207, combines part of 7218
7209 Earthquake dynamics and mechanics 7209 Earthquake dynamics (1242) revised, added xr
7212 Earthquake ground motions and engineering 7212 Earthquake ground motions and engineering seismology revised
7215 Earthquake parameters 7215 Earthquake source observations (1240) revised, added xr
7218 Lithosphere and upper mantle 7218 Lithosphere (1236) revised, split into 7218 and 7208
7219 Nuclear explosion seismology 7219 Seismic monitoring and test-ban treaty verification revised
7220 Oceanic crust 7220 Oceanic crust unchanged
7221 Paleoseismology 7221 Paleoseismology (8036) unchanged, added xr
7223 Seismic hazard assessment and prediction 7223 Earthquake interaction, forecasting, and prediction (1217, 1242) revised, added xr
7230 Seismicity and seismotectonics 7230 Seismicity and tectonics (1207, 1217, 1240, 1242) revised, added xr
    7240 Subduction zones (1207, 1219, 1240) new
    7245 Mid-ocean ridges new
    7250 Transform faults new
7255 Surface waves and free oscillations 7255 Surface waves and free oscillations unchanged
7260 Theory and modeling 7260 Theory revised
    7270 Tomography (6982, 8180) new
7280 Volcano seismology (8419) 7280 Volcano seismology (8419) unchanged
    7290 Computational seismology new
7294 Instruments and techniques 7294 Seismic instruments and networks (0935, 3025) revised, added xr
7299 General and miscellaneous 7299 General or miscellaneous unchanged
7500 SOLAR PHYSICS, ASTROPHYSICS, AND ASTRONOMY 7500 SOLAR PHYSICS, ASTROPHYSICS, AND ASTRONOMY unchanged
7504 Celestial mechanics 7504 Celestial mechanics unchanged
7507 Chromosphere 7507 Chromosphere unchanged
7509 Corona 7509 Corona unchanged
7511 Coronal holes 7511 Coronal holes unchanged
7513 Coronal mass ejections 7513 Coronal mass ejections (2101) unchanged, added xr
7514 Energetic particles (2114) 7514 Energetic particles (2114) unchanged
7519 Flares 7519 Flares unchanged
7522 Helioseismology 7522 Helioseismology unchanged
7524 Magnetic fields 7524 Magnetic fields unchanged
    7526 Magnetic reconnection (2723, 7835) new
7529 Photosphere 7529 Photosphere unchanged
7531 Prominence eruptions 7531 Prominence eruptions unchanged
7534 Radio emissions 7534 Radio emissions unchanged
7536 Solar activity cycle (2162) 7536 Solar activity cycle (2162) unchanged
7537 Solar and stellar variability 7537 Solar and stellar variability (1650) unchanged
7538 Solar irradiance 7538 Solar irradiance unchanged
7539 Stellar astronomy 7539 Stellar astronomy unchanged
7544 Stellar interiors and dynamo theory 7544 Stellar interiors and dynamo theory unchanged
7546 Transition region 7546 Transition region unchanged
7549 Ultraviolet emissions 7549 Ultraviolet emissions unchanged
7554 X-rays, gamma rays, and neutrinos 7554 X-rays, gamma rays, and neutrinos unchanged
7594 Instruments and techniques 7594 Instruments and techniques unchanged
7599 General or miscellaneous 7599 General or miscellaneous unchanged
7800 SPACE PLASMA PHYSICS 7800 SPACE PLASMA PHYSICS unchanged
7803 Active perturbation experiments 7803 Active perturbation experiments unchanged
    7805 Chaos (4420) moved from 3240
7807 Charged particle motion and acceleration 7807 Charged particle motion and acceleration unchanged
7811 Discontinuities 7811 Discontinuities (2109) unchanged, added xr
7815 Electrostatic structures 7815 Electrostatic structures unchanged
7819 Experimental and mathematical techniques     split into 7831 and 7833
7823 Ionization processes 7823 Ionization processes (2423) unchanged, added xr
7827 Kinetic and MHD theory 7827 Kinetic and MHD theory unchanged
    7829 Kinetic waves and instabilities new
7831 Laboratory studies 7831 Laboratory studies and experimental techniques revised
7835 Magnetic reconnection 7835 Magnetic reconnection (2723, 7526) unchanged, added xr
    7833 Mathematical and numerical techniques (0500, 3200) new
    7836 MHD waves and instabilities (2149, 2752, 6050) new
7837 Neutral particles 7837 Neutral particles (2151) unchanged, added xr
7839 Nonlinear phenomena (4400) 7839 Nonlinear phenomena (4400, 6944) unchanged, added xr
7843 Numerical simulation studies     deleted
    7844 Parametric processes new
    7845 Particle acceleration new
    7846 Plasma energization new
    7849 Plasma interactions with dust and aerosols (2461) new
7847 Radiation processes 7847 Radiation processes unchanged
7851 Shock waves 7851 Shock waves (4455) unchanged, added xr
    7852 Solitons and solitary waves (4455) new
7853 Spacecraft/atmosphere interactions 7853 Spacecraft/atmosphere interactions unchanged
7855 Spacecraft sheaths, wakes, charging 7855 Spacecraft sheaths, wakes, charging unchanged
    7857 Stochastic phenomena (3235, 3265, 4475) new
7859 Transport processes 7859 Transport processes unchanged
7863 Turbulence 7863 Turbulence (4490) unchanged, added xr
7867 Wave/particle interactions 7867 Wave/particle interactions (2483, 6984) unchanged, added xr
7868 Wave/wave interactions 7868 Wave/wave interactions unchanged
7871 Waves and instabilities     deleted
7894 Instruments and techniques 7894 Instruments and techniques unchanged
7899 General or miscellaneous 7899 General or miscellaneous unchanged
  7900 SPACE WEATHER new
    7904 Geomagnetically induced currents new
    7914 Engineering for hazard mitigation new
    7924 Forecasting (2722) new
    7934 Impacts on technological systems new
    7938 Impacts on humans new
    7944 Ionospheric effects on radio waves new
    7949 Ionospheric storms (2441) new
    7954 Magnetic storms (2788) new
    7959 Models new
    7964 Policy (2722, 6300) new
    7969 Satellite drag (1241) new
    7974 Solar effects new
    7984 Space radiation environment new
    7999 General or miscellaneous new
8000 STRUCTURAL GEOLOGY (replaces single entry 8165) 8000 STRUCTURAL GEOLOGY unchanged
    8002 Continental neotectonics (8107) new
    8003 Diapir and diapirism new
    8004 Dynamics and mechanics of faulting (8118) new
8005 Folds and folding 8005 Folds and folding unchanged
8010 Fractures and faults 8010 Fractures and faults unchanged
    8011 Kinematics of crustal and mantle deformation new
    8012 High strain deformation zones new
8015 Local crustal structure 8015 Local crustal structure unchanged
8020 Mechanics 8020 Mechanics, theory, and modeling revised
    8021 Melanges new
8025 Mesoscopic fabrics 8025 Mesoscopic fabrics unchanged
8030 Microstructures 8030 Microstructures unchanged
    8031 Rheology: crust and lithosphere (8159) new
    8032 Rheology: general (8160) new
    8033 Rheology: mantle (8162) new
    8034 Rheology and friction of fault zones (8163) new
8035 Pluton emplacement 8035 Pluton emplacement unchanged
    8036 Paleoseismology (7221) new
    8038 Regional crustal structure new
8040 Remote sensing 8040 Remote sensing unchanged
8045 Role of fluids 8045 Role of fluids unchanged
8094 Instruments and techniques 8094 Instruments and techniques unchanged
8099 General or miscellaneous 8099 General or miscellaneous unchanged
8100 TECTONOPHYSICS 8100 TECTONOPHYSICS unchanged
8102 Continental contractional orogenic belts 8102 Continental contractional orogenic belts and inversion tectonics revised
    8103 Continental cratons new
    8104 Continental margins: convergent new
8105 Continental margins and sedimentary basins (1212) 8105 Continental margins: divergent (1212, 8124) revised, split into 8105, 8106 and 8169, added xr
    8106 Continental margins: transform new, split from 8105
8107 Continental neotectonics 8107 Continental neotectonics (8002) unchanged, added xr
    8108 Continental tectonics: compressional new
8109 Continental tectonics--extensional (0905) 8109 Continental tectonics: extensional (0905) unchanged
8110 Continental tectonics--general (0905) 8110 Continental tectonics: general (0905) unchanged
    8111 Continental tectonics: strike-slip and transform new
8115 Core processes (1507) 8115 Core processes (1213, 1507) unchanged, added xr
    8118 Dynamics and mechanics of faulting (8004) new
8120 Dynamics of lithosphere and mantle--general 8120 Dynamics of lithosphere and mantle: general (1213) unchanged, added xr
8121 Dynamics, convection currents, and mantle plumes 8121 Dynamics: convection currents, and mantle plumes unchanged
8122 Dynamics, gravity and tectonics 8122 Dynamics: gravity and tectonics unchanged
8123 Dynamics, seismotectonics 8123 Dynamics: seismotectonics unchanged
8124 Earth's interior--composition and state (1212) 8124 Earth's interior: composition and state (1212, 7207, 7208, 8105) unchanged, added xr
8125 Evolution of the Earth 8125 Evolution of the Earth (0325) unchanged, added xr
8130 Heat generation and transport 8130 Heat generation and transport unchanged
8135 Hydrothermal systems (8424) 8135 Hydrothermal systems (0450, 1034, 3017, 3616, 4832, 8424) unchanged, added xr
    8136 Impact phenomena (5420, 6022) new
    8137 Hotspots, large igneous provinces, and flood basalt volcanism new
    8138 Lithospheric flexure new
    8139 Obduction tectonics new
    8140 Ophiolites (3042) new
8145 Physics of magma and magma bodies 8145 Physics of magma and magma bodies  
8147 Planetary interiors (5430, 5724) 8147 Planetary interiors (5430, 5724, 6024) unchanged, added xr
    8148 Planetary volcanism (5480, 8450) new
8149 Planetary tectonics (5475) 8149 Planetary tectonics (5475) unchanged
8150 Plate boundary--general (3040) 8150 Plate boundary: general (3040) unchanged
8155 Plate motions--general 8155 Plate motions: general (3040) unchanged, added xr
8157 Plate motions--past (3040) 8157 Plate motions: past (3040) unchanged
8158 Plate motions--present and recent (3040) 8158 Plate motions: present and recent (3040) unchanged
8159 Rheology--crust and lithosphere 8159 Rheology: crust and lithosphere (8031) unchanged, added xr
8160 Rheology--general 8160 Rheology: general (1236, 8032) unchanged, added xr
8162 Rheology--mantle 8162 Rheology: mantle (8033) unchanged, added xr
    8163 Rheology and friction of fault zones (8034) new
8164 Stresses--crust and lithosphere 8164 Stresses: crust and lithosphere unchanged
8166 Stresses--deep-seated 8166 Stresses: deep-seated unchanged
8168 Stresses--general 8168 Stresses: general unchanged
    8169 Sedimentary basin processes new
    8170 Subduction zone processes (1031, 3060, 3613, 8413) new
    8175 Tectonics and landscape evolution new
    8177 Tectonics and climatic interactions new
    8178 Tectonics and magmatism new
8180 Tomography 8180 Tomography (6982, 7270) unchanged, added xr
    8185 Volcanic arcs new
8194 Instruments and techniques 8194 Instruments and techniques unchanged
8199 General or miscellaneous 8199 General or miscellaneous unchanged
8400 VOLCANOLOGY 8400 VOLCANOLOGY unchanged
    8410 Geochemical modeling (1009, 3610) new
    8411 Thermodynamics (0766, 1011, 3611) new
    8412 Reactions and phase equilibria (1012, 3612) new
    8413 Subduction zone processes (1031, 3060, 3613, 8170) new
    8416 Mid-oceanic ridge processes (1032, 3614) new
    8415 Intra-plate processes (1033, 3615) new
8424 Hydrothermal systems (8135) 8424 Hydrothermal systems (0450, 1034, 3017, 3616, 4832, 8135) unchanged, added xr
    8425 Effusive volcanism new
    8426 Mud volcanism new
    8427 Subaqueous volcanism new
    8428 Explosive volcanism new
8450 Planetary volcanism (5480) 8450 Planetary volcanism (5480, 6063, 8148) unchanged, added xr
8404 Ash deposits 8404 Volcanoclastic deposits revised
    8408 Volcano/climate interactions (1605, 3309) new
8409 Atmospheric effects (0370) 8409 Atmospheric effects (0370) unchanged
    8430 Volcanic gases new
8429 Lava rheology and morphology 8429 Lava rheology and morphology unchanged
8434 Magma migration 8434 Magma migration and fragmentation revised
8414 Eruption mechanisms 8414 Eruption mechanisms and flow emplacement revised
8439 Physics and chemistry of magma bodies 8439 Physics and chemistry of magma bodies unchanged
    8440 Calderas new
    8445 Experimental volcanism new
    8455 Tephrochronology (1145) new
    8485 Remote sensing of volcanoes new
    8486 Field relationships (1090, 3690) new
8419 Eruption monitoring (7280) 8419 Volcano monitoring (7280) revised
    8488 Volcanic hazards and risks new
8494 Instruments and techniques 8494 Instruments and techniques unchanged
8499 General or miscellaneous 8499 General or miscellaneous unchanged
9300 INFORMATION RELATED TO GEOGRAPHIC REGION 9300 GEOGRAPHIC LOCATION revised
9305 Africa 9305 Africa unchanged
9310 Antarctica 9310 Antarctica (4207) unchanged, added xr
9315 Arctic region 9315 Arctic region (0718, 4207) unchanged, added xr
9320 Asia 9320 Asia unchanged
9325 Atlantic Ocean 9325 Atlantic Ocean unchanged
9330 Australia 9330 Australia unchanged
9335 Europe 9335 Europe unchanged
9340 Indian Ocean 9340 Indian Ocean unchanged
9345 Large bodies of water (e.g., lakes and inland seas) 9345 Large bodies of water (e.g., lakes and inland seas) (0746) unchanged, added xr
9350 North America 9350 North America unchanged
9355 Pacific Ocean 9355 Pacific Ocean unchanged
9360 South America 9360 South America unchanged
9399 General or miscellaneous 9399 General or miscellaneous unchanged
9600 INFORMATION RELATED TO GEOLOGIC TIME 9600 INFORMATION RELATED TO GEOLOGIC TIME unchanged
9604 Cenozoic 9604 Cenozoic unchanged
    9605 Neogene new
    9606 Paleogene new
9609 Mesozoic 9609 Mesozoic unchanged
    9610 Cretaceous new
    9611 Jurassic new
    9612 Triassic new
9614 Paleozoic 9614 Paleozoic unchanged
    9615 Permian new
    9616 Carboniferous new
    9617 Devonian new
    9618 Silurian new
    9620 Ordovician new
    9621 Cambrian new
9619 Precambrian 9619 Precambrian unchanged
    9622 Proterozoic new
    9623 Archean new
9699 General or miscellaneous 9699 General or miscellaneous unchanged
9800 GENERAL OR MISCELLANEOUS 9800 GENERAL OR MISCELLANEOUS unchanged
9805 Instruments useful in three or more fields 9805 Instruments useful in three or more fields unchanged
9810 New fields (not classifiable under other headings) 9810 New fields (not classifiable under other headings) unchanged
9815 Notices and announcements 9815 Notices and announcements unchanged
9820 Techniques applicable in three or more fields 9820 Techniques applicable in three or more fields unchanged
9900 CORRECTIONS 9900 CORRECTIONS unchanged