Publications
	AGU Index Terms Browse Tree    Effective 1 January 2005

This page contains a browseable/searchable list of the AGU Index Terms (2005 Rev.).
Select a term to retrieve AGU articles indexed by that topic.

Top-Level Categories

Cross-references are listed in parentheses and indicate other relevant terms.

0300	ATMOSPHERIC COMPOSITION AND STRUCTURE
0305	Aerosols and particles (0345, 4801, 4906)
0310	Airglow and aurora
0312	Air/sea constituent fluxes (3339, 4504)
0315	Biosphere/atmosphere interactions (0426, 1610)
0317	Chemical kinetic and photochemical properties
0320	Cloud physics and chemistry
0319	Cloud optics
0321	Cloud/radiation interaction
0322	Constituent sources and sinks
0325	Evolution of the atmosphere (1610, 8125)
0328	Exosphere
0330	Geochemical cycles (1030)
0335	Ion chemistry of the atmosphere (2419, 2427)
0340	Middle atmosphere: composition and chemistry
0341	Middle atmosphere: constituent transport and chemistry (3334)
0342	Middle atmosphere: energy deposition (3334)
0343	Planetary atmospheres (5210, 5405, 5704)
0345	Pollution: urban and regional (0305, 0478, 4251)
0350	Pressure, density, and temperature
0355	Thermosphere: composition and chemistry
0358	Thermosphere: energy deposition (3369)
0360	Radiation: transmission and scattering
0365	Troposphere: composition and chemistry
0368	Troposphere: constituent transport and chemistry
0370	Volcanic effects (8409)
0394	Instruments and techniques
0399	General or miscellaneous
 
0400	BIOGEOSCIENCES
0402	Agricultural systems
0404	Anoxic and hypoxic environments (4802, 4834)
0406	Astrobiology and extraterrestrial materials
0408	Benthic processes (4804)
0409	Bioavailability: chemical speciation and complexation
0410	Biodiversity
0412	Biogeochemical kinetics and reaction modeling (0414, 0793, 1615, 4805, 4912)
0414	Biogeochemical cycles, processes, and modeling (0412, 0793, 1615, 4805, 4912)
0416	Biogeophysics
0418	Bioremediation
0419	Biomineralization
0420	Biomolecular and chemical tracers
0422	Bio-optics
0424	Biosignatures and proxies
0426	Biosphere/atmosphere interactions (0315)
0428	Carbon cycling (4806)
0429	Climate dynamics (1620)
0430	Computational methods and data processing
0432	Contaminant and organic biogeochemistry (0792)
0434	Data sets
0438	Diel, seasonal, and annual cycles (4227)
0439	Ecosystems, structure and dynamics (4815)
0442	Estuarine and nearshore processes (4235)
0444	Evolutionary geobiology
0448	Geomicrobiology
0450	Hydrothermal systems (1034, 3017, 3616, 4832, 8135, 8424)
0452	Instruments and techniques
0454	Isotopic composition and chemistry (1041, 4870)
0456	Life in extreme environments
0458	Limnology (1845, 4239, 4942)
0459	Macro- and micropaleontology (3030, 4944)
0460	Marine systems (4800)
0461	Metals
0463	Microbe/mineral interactions
0465	Microbiology: ecology, physiology and genomics (4840)
0466	Modeling
0468	Natural hazards
0469	Nitrogen cycling
0470	Nutrients and nutrient cycling (4845, 4850)
0471	Oxidation/reduction reactions (4851)
0473	Paleoclimatology and paleoceanography (3344, 4900)
0475	Permafrost, cryosphere, and high-latitude processes (0702, 0716)
0476	Plant ecology (1851)
0478	Pollution: urban, regional and global (0345, 4251)
0480	Remote sensing
0481	Restoration
0483	Riparian systems (0744, 1856)
0485	Science policy (6620)
0486	Soils/pedology (1865)
0488	Sulfur cycling
0489	Trace element cycling (4875)
0490	Trace gases
0491	Food webs and trophodynamics (4817)
0493	Urban systems
0495	Water/energy interactions (1878)
0496	Water quality
0497	Wetlands (1890)
0498	General or miscellaneous
0499	New fields (not classifiable under other headings)
 
0500	COMPUTATIONAL GEOPHYSICS  (3200, 3252, 7833)
0510	Agent-based models
0515	Cellular automata
0520	Data analysis: algorithms and implementation
0525	Data management
0530	Data presentation and visualization
0535	Hardware solutions
0540	Image processing
0545	Modeling (4255)
0550	Model verification and validation
0555	Neural networks, fuzzy logic, machine learning
0560	Numerical solutions (4255)
0594	Instruments and techniques
0599	General or miscellaneous
 
0700	CRYOSPHERE (4540)
0702	Permafrost (0475)
0704	Seasonally frozen ground
0706	Active layer
0708	Thermokarst
0710	Periglacial processes
0712	Cryosol
0714	Clathrate
0716	Cryobiology (0475)
0718	Tundra (9315)
0720	Glaciers
0722	Rock glaciers
0724	Ice cores (4932)
0726	Ice sheets
0728	Ice shelves
0730	Ice streams
0732	Icebergs
0734	Icing (aufeis, naled)
0736	Snow (1827, 1863)
0738	Ice (1863)
0740	Snowmelt
0742	Avalanches
0744	Rivers (0483, 1856)
0746	Lakes (9345)
0748	Ponds
0750	Sea ice (4540)
0752	Polynas (4540)
0754	Leads (4540)
0758	Remote sensing
0760	Engineering
0762	Mass balance (1218, 1223)
0764	Energy balance
0766	Thermodynamics (1011, 3611, 8411)
0768	Thermal regime
0770	Properties
0772	Distribution
0774	Dynamics
0776	Glaciology (1621, 1827, 1863)
0790	Weathering (1625, 1886)
0792	Contaminants (0432)
0793	Biogeochemistry (0412, 0414, 1615, 4805, 4912)
0794	Instruments and techniques
0798	Modeling
0799	General or miscellaneous
 
0800	EDUCATION
0805	Elementary and secondary education
0810	Post-secondary education
0815	Informal education
0820	Curriculum and laboratory design
0825	Teaching methods
0830	Teacher training
0840	Evaluation and assessment
0845	Instructional tools
0850	Geoscience education research
0855	Diversity
 
0600	ELECTROMAGNETICS
0604	Antenna arrays
0609	Antennas
0614	Biological effects
0619	Electromagnetic theory
0624	Guided waves
0629	Inverse scattering
0634	Measurement and standards
0639	Nonlinear electromagnetics
0644	Numerical methods
0649	Optics (4264)
0654	Plasmas
0659	Random media and rough surfaces
0664	Reflectors and feeds
0669	Scattering and diffraction
0674	Signal processing and adaptive antennas (6974)
0679	Singularity expansion method
0684	Transient and time domain
0689	Wave propagation (2487, 3285, 4275, 4455, 6934)
0694	Instruments and techniques
0699	General or miscellaneous
 
0900	EXPLORATION GEOPHYSICS
0902	Computational methods: seismic
0903	Computational methods: potential fields (1214)
0905	Continental structures (8109, 8110)
0910	Data processing
0915	Downhole methods
0920	Gravity methods (1219)
0925	Magnetic and electrical methods (5109)
0930	Oceanic structures
0932	Radioactivity methods
0933	Remote sensing
0935	Seismic methods (3025, 7294)
0994	Instruments and techniques
0999	General or miscellaneous
 
1000	GEOCHEMISTRY
1009	Geochemical modeling (3610, 8410)
1011	Thermodynamics (0766, 3611, 8411)
1012	Reactions and phase equilibria (3612, 8412)
1031	Subduction zone processes (3060, 3613, 8170, 8413)
1032	Mid-oceanic ridge processes (3614, 8416)
1033	Intra-plate processes (3615, 8415)
1034	Hydrothermal systems (0450, 3017, 3616, 4832, 8135, 8424)
1039	Alteration and weathering processes (3617)
1036	Magma chamber processes (3618)
1037	Magma genesis and partial melting (3619)
1038	Mantle processes (3621)
1015	Composition of the core
1020	Composition of the continental crust
1021	Composition of the oceanic crust
1022	Composition of the hydrosphere
1023	Composition of the biosphere
1025	Composition of the mantle
1026	Composition of the moon
1027	Composition of the planets
1028	Composition of meteorites (3662, 6240)
1029	Composition of aerosols and dust particles
1030	Geochemical cycles (0330)
1065	Major and trace element geochemistry
1040	Radiogenic isotope geochemistry
1041	Stable isotope geochemistry (0454, 4870)
1042	Mineral and crystal chemistry (3620)
1043	Fluid and melt inclusion geochemistry
1050	Marine geochemistry (4835, 4845, 4850)
1051	Sedimentary geochemistry
1055	Organic and biogenic geochemistry
1060	Planetary geochemistry  (5405, 5410, 5704, 5709, 6005, 6008)
1090	Field relationships (3690, 8486)
1094	Instruments and techniques
1099	General or miscellaneous
 
1100	GEOCHRONOLOGY
1105	Quaternary geochronology
1110	Sidereal geochronology
1115	Radioisotope geochronology
1120	Isotopic disequilibrium dating
1125	Chemical and biological geochronology
1130	Geomorphological geochronology
1135	Correlative geochronology
1140	Thermochronology
1145	Tephrochronology (8455)
1150	Cosmogenic-nuclide exposure dating (4918)
1155	Extinct radionuclide geochronology
1160	Planetary and lunar geochronology
1165	Sedimentary geochronology
1194	Instruments and techniques
1199	General or miscellaneous
 
1200	GEODESY AND GRAVITY
1244	Standards and absolute measurements
1294	Instruments and techniques
1295	Integrations of techniques
1240	Satellite geodesy: results (6929, 7215, 7230, 7240)
1241	Satellite geodesy: technical issues (6994, 7969)
1243	Space geodetic surveys
1204	Control surveys
1242	Seismic cycle related deformations (6924, 7209, 7223, 7230)
1207	Transient deformation (6924, 7230, 7240)
1209	Tectonic deformation (6924)
1211	Non-tectonic deformation
1212	Earth's interior: composition and state (7207, 7208, 8105, 8124)
1213	Earth's interior: dynamics (1507, 7207, 7208, 8115, 8120)
1236	Rheology of the lithosphere and mantle (7218, 8160)
1219	Gravity anomalies and Earth structure (0920, 7205, 7240)
1214	Geopotential theory and determination (0903)
1217	Time variable gravity (7223, 7230)
1229	Reference systems
1239	Earth rotation variations
1223	Ocean/Earth/atmosphere/hydrosphere/cryosphere interactions (0762, 1218, 3319, 4550)
1218	Mass balance (0762, 1223, 1631, 1836, 1843, 3010, 3322, 4532)
1220	Atmosphere monitoring with geodetic techniques (6952)
1222	Ocean monitoring with geodetic techniques (1225, 1641, 3010, 4532, 4556, 4560, 6959)
1225	Global change from geodesy (1222, 1622, 1630, 1641, 1645, 4556)
1221	Lunar and planetary geodesy and gravity (5417, 5450, 5714, 5744, 6019, 6250)
1299	General or miscellaneous (1709)
 
1500	GEOMAGNETISM AND PALEOMAGNETISM
1503	Archeomagnetism
1505	Biogenic magnetic minerals
1507	Core processes (1213, 8115)
1510	Dynamo: theories and simulations
1512	Environmental magnetism
1513	Geomagnetic excursions
1515	Geomagnetic induction
1517	Magnetic anomalies: modeling and interpretation
1518	Magnetic fabrics and anisotropy
1519	Magnetic mineralogy and petrology
1520	Magnetostratigraphy
1521	Paleointensity
1522	Paleomagnetic secular variation
1525	Paleomagnetism applied to tectonics: regional, global
1527	Paleomagnetism applied to geologic processes
1530	Rapid time variations
1532	Reference fields: regional, global
1533	Remagnetization
1535	Reversals: process, timescale, magnetostratigraphy
1540	Rock and mineral magnetism
1541	Satellite magnetics: main field, crustal field, external field
1545	Spatial variations: all harmonics and anomalies
1550	Spatial variations attributed to seafloor spreading (3005)
1555	Time variations: diurnal to decadal
1560	Time variations: secular and longer
1594	Instruments and techniques
1595	Planetary magnetism: all frequencies and wavelengths
1599	General or miscellaneous
 
1600	GLOBAL CHANGE
1605	Abrupt/rapid climate change (4901, 8408)
1610	Atmosphere (0315, 0325)
1615	Biogeochemical cycles, processes, and modeling (0412, 0414, 0793, 4805, 4912)
1616	Climate variability (1635, 3305, 3309, 4215, 4513)
1620	Climate dynamics (0429, 3309)
1621	Cryospheric change (0776)
1622	Earth system modeling (1225)
1625	Geomorphology and weathering (0790, 1824, 1825, 1826, 1886)
1626	Global climate models (3337, 4928)
1630	Impacts of global change (1225)
1631	Land/atmosphere interactions (1218, 1843, 3322)
1632	Land cover change
1635	Oceans (1616, 3305, 4215, 4513)
1637	Regional climate change
1640	Remote sensing (1855)
1641	Sea level change (1222, 1225, 4556)
1645	Solid Earth (1225)
1650	Solar variability (7537)
1655	Water cycles (1836)
1694	Instruments and techniques
1699	General or miscellaneous
 
1700	HISTORY OF GEOPHYSICS
1704	Atmospheric sciences
1705	Biogeosciences
1706	Computational geophysics
1707	Cryosphere
1708	Geochronology
1709	Geodesy (1299)
1714	Geomagnetism and paleomagnetism
1719	Hydrology
1721	Nonlinear geophysics
1724	Ocean sciences
1729	Planetology
1734	Seismology
1739	Solar/planetary relationships
1744	Tectonophysics
1749	Volcanology, geochemistry, and petrology
1794	Instruments and techniques
1799	General or miscellaneous
 
1800	HYDROLOGY
1803	Anthropogenic effects (4802, 4902)
1804	Catchment
1806	Chemistry of fresh water
1807	Climate impacts
1805	Computational hydrology
1808	Dams
1810	Debris flow and landslides
1809	Desertification
1812	Drought
1813	Eco-hydrology
1814	Energy budgets
1815	Erosion
1816	Estimation and forecasting
1818	Evapotranspiration
1817	Extreme events
1821	Floods
1820	Floodplain dynamics
1823	Frozen ground
1819	Geographic Information Systems (GIS)
1822	Geomechanics
1824	Geomorphology: general (1625)
1825	Geomorphology: fluvial (1625)
1826	Geomorphology: hillslope (1625)
1827	Glaciology (0736, 0776, 1863)
1828	Groundwater hydraulics
1829	Groundwater hydrology
1831	Groundwater quality
1830	Groundwater/surface water interaction
1832	Groundwater transport
1834	Human impacts
1833	Hydroclimatology
1835	Hydrogeophysics
1836	Hydrological cycles and budgets (1218, 1655)
1840	Hydrometeorology
1839	Hydrologic scaling
1838	Infiltration
1842	Irrigation
1843	Land/atmosphere interactions (1218, 1631, 3322)
1845	Limnology (0458, 4239, 4942)
1846	Model calibration (3333)
1847	Modeling
1848	Monitoring networks
1849	Numerical approximations and analysis
1850	Overland flow
1851	Plant ecology (0476)
1852	Plant uptake
1854	Precipitation (3354)
1853	Precipitation-radar
1855	Remote sensing (1640)
1857	Reservoirs (surface)
1856	River channels (0483, 0744)
1858	Rocks: chemical properties
1859	Rocks: physical properties
1860	Streamflow
1861	Sedimentation (4863)
1862	Sediment transport (4558)
1863	Snow and ice (0736, 0738, 0776, 1827)
1865	Soils (0486)
1866	Soil moisture
1869	Stochastic hydrology
1871	Surface water quality
1872	Time series analysis (3270, 4277, 4475)
1873	Uncertainty assessment (3275)
1874	Ungaged basins
1875	Vadose zone
1876	Water budgets
1878	Water/energy interactions (0495)
1879	Watershed
1880	Water management (6334)
1884	Water supply
1886	Weathering (0790, 1625)
1890	Wetlands (0497)
1894	Instruments and techniques: modeling
1895	Instruments and techniques: monitoring
1899	General or miscellaneous
 
2100	INTERPLANETARY PHYSICS
2101	Coronal mass ejections (7513)
2102	Corotating streams
2104	Cosmic rays
2109	Discontinuities (7811)
2111	Ejecta, driver gases, and magnetic clouds
2114	Energetic particles (7514)
2124	Heliopause and solar wind termination
2126	Heliosphere/interstellar medium interactions
2129	Interplanetary dust
2134	Interplanetary magnetic fields
2139	Interplanetary shocks
2144	Interstellar gas
2149	MHD waves and turbulence (2752, 6050, 7836)
2151	Neutral particles (7837)
2152	Pickup ions
2154	Planetary bow shocks
2159	Plasma waves and turbulence
2162	Solar cycle variations (7536)
2164	Solar wind plasma
2169	Solar wind sources
2194	Instruments and techniques
2199	General or miscellaneous
 
2400	IONOSPHERE (6929)
2403	Active experiments
2407	Auroral ionosphere (2704)
2409	Current systems (2721)
2411	Electric fields (2712)
2415	Equatorial ionosphere
2419	Ion chemistry and composition (0335)
2423	Ionization processes (7823)
2427	Ionosphere/atmosphere interactions (0335)
2431	Ionosphere/magnetosphere interactions (2736)
2435	Ionospheric disturbances
2437	Ionospheric dynamics
2439	Ionospheric irregularities
2441	Ionospheric storms  (7949)
2442	Meteor-trail physics
2443	Midlatitude ionosphere
2447	Modeling and forecasting
2451	Particle acceleration
2455	Particle precipitation
2459	Planetary ionospheres (5435, 5729, 6026)
2461	Plasma interactions with dust and aerosols (7849)
2463	Plasma convection (2760)
2467	Plasma temperature and density
2471	Plasma waves and instabilities (2772)
2475	Polar cap ionosphere
2479	Solar radiation and cosmic ray effects
2481	Topside ionosphere
2483	Wave/particle interactions (7867)
2487	Wave propagation (0689, 3285, 4275, 4455, 6934)
2494	Instruments and techniques
2499	General or miscellaneous
 
2700	MAGNETOSPHERIC PHYSICS (6939)
2704	Auroral phenomena (2407)
2706	Cusp
2712	Electric fields (2411)
2716	Energetic particles: precipitating
2720	Energetic particles: trapped
2721	Field-aligned currents and current systems (2409)
2722	Forecasting (7924, 7964)
2723	Magnetic reconnection (7526, 7835)
2724	Magnetopause and boundary layers
2728	Magnetosheath
2730	Magnetosphere: inner
2731	Magnetosphere: outer
2732	Magnetosphere interactions with satellites and rings
2736	Magnetosphere/ionosphere interactions  (2431)
2740	Magnetospheric configuration and dynamics
2744	Magnetotail
2748	Magnetotail boundary layers
2752	MHD waves and instabilities (2149, 6050, 7836)
2753	Numerical modeling
2756	Planetary magnetospheres (5443, 5737, 6033)
2760	Plasma convection (2463)
2764	Plasma sheet
2768	Plasmasphere
2772	Plasma waves and instabilities (2471)
2776	Polar cap phenomena
2774	Radiation belts
2778	Ring current
2780	Solar wind interactions with unmagnetized bodies
2784	Solar wind/magnetosphere interactions
2788	Magnetic storms and substorms  (7954)
2790	Substorms
2794	Instruments and techniques
2799	General or miscellaneous
 
3000	MARINE GEOLOGY AND GEOPHYSICS
3001	Back-arc basin processes
3002	Continental shelf and slope processes (4219)
3004	Gas and hydrate systems
3005	Marine magnetics and paleomagnetics (1550)
3006	Marine electromagnetics
3010	Gravity and isostasy (1218, 1222)
3015	Heat flow (benthic)
3017	Hydrothermal systems (0450, 1034, 3616, 4832, 8135, 8424)
3020	Littoral processes
3021	Marine hydrogeology
3022	Marine sediments: processes and transport
3025	Marine seismics (0935, 7294)
3030	Micropaleontology (0459, 4944)
3035	Midocean ridge processes
3036	Ocean drilling
3037	Oceanic hotspots and intraplate volcanism
3038	Oceanic plateaus and microcontinents
3039	Oceanic transform and fracture zone processes
3040	Plate tectonics (8150, 8155, 8157, 8158)
3042	Ophiolites (8140)
3045	Seafloor morphology, geology, and geophysics
3050	Ocean observatories and experiments
3060	Subduction zone processes (1031, 3613, 8170, 8413)
3070	Submarine landslides
3075	Submarine tectonics and volcanism
3080	Submergence instruments: ROV, AUV, submersibles
3094	Instruments and techniques
3099	General or miscellaneous
 
3200	MATHEMATICAL GEOPHYSICS (0500, 4400, 7833)
3205	Fourier analysis (3255)
3215	Instability analysis
3260	Inverse theory
3225	Numerical approximations and analysis (4260)
3235	Persistence, memory, correlations, clustering (3265, 7857)
3238	Prediction (3245, 4263)
3245	Probabilistic forecasting (3238)
3252	Spatial analysis (0500)
3255	Spectral analysis (3205, 3280)
3265	Stochastic processes (3235, 4468, 4475, 7857)
3270	Time series analysis (1872, 4277, 4475)
3275	Uncertainty quantification (1873)
3280	Wavelet transform (3255, 4455)
3285	Wave propagation (0689, 2487, 4275, 4455, 6934)
3294	Instruments and techniques
3299	General or miscellaneous
 
3300	ATMOSPHERIC PROCESSES
3304	Atmospheric electricity
3305	Climate change and variability (1616, 1635, 3309, 4215, 4513)
3307	Boundary layer processes
3309	Climatology (1616, 1620, 3305, 4215, 8408)
3311	Clouds and aerosols
3310	Clouds and cloud feedbacks
3314	Convective processes
3315	Data assimilation
3319	General circulation (1223)
3322	Land/atmosphere interactions (1218, 1631, 1843)
3324	Lightning
3329	Mesoscale meteorology
3332	Mesospheric dynamics
3333	Model calibration (1846)
3334	Middle atmosphere dynamics (0341, 0342)
3337	Global climate models (1626, 4928)
3339	Ocean/atmosphere interactions (0312, 4504)
3344	Paleoclimatology (0473, 4900)
3346	Planetary meteorology (5445, 5739)
3349	Polar meteorology
3354	Precipitation (1854)
3359	Radiative processes
3355	Regional modeling
3360	Remote sensing
3362	Stratosphere/troposphere interactions
3364	Synoptic-scale meteorology
3367	Theoretical modeling
3369	Thermospheric dynamics (0358)
3374	Tropical meteorology
3379	Turbulence (4490)
3384	Acoustic-gravity waves
3389	Tides and planetary waves
3394	Instruments and techniques
3399	General or miscellaneous
 
3600	MINERALOGY AND PETROLOGY
3610	Geochemical modeling (1009, 8410)
3611	Thermodynamics (0766, 1011, 8411)
3612	Reactions and phase equilibria (1012, 8412)
3613	Subduction zone processes (1031, 3060, 8170, 8413)
3614	Mid-oceanic ridge processes (1032, 8416)
3615	Intra-plate processes (1033, 8415)
3616	Hydrothermal systems (0450, 1034, 3017, 4832, 8135, 8424)
3617	Alteration and weathering processes (1039)
3618	Magma chamber processes (1036)
3619	Magma genesis and partial melting (1037)
3621	Mantle processes (1038)
3620	Mineral and crystal chemistry (1042)
3625	Petrography, microstructures, and textures
3630	Experimental mineralogy and petrology
3640	Igneous petrology
3641	Extrusive structures and rocks
3642	Intrusive structures and rocks
3643	Layered magma chambers
3660	Metamorphic petrology
3651	Thermobarometry
3652	Pressure-temperature-time paths
3653	Fluid flow
3654	Ultra-high pressure metamorphism
3656	Ultra-high temperature metamorphism
3662	Meteorite mineralogy and petrology (1028, 6240)
3665	Mineral occurrences and deposits
3672	Planetary mineralogy and petrology (5410)
3675	Sedimentary petrology
3690	Field relationships (1090, 8486)
3694	Instruments and techniques
3699	General or miscellaneous
 
3900	MINERAL PHYSICS
3902	Creep and deformation
3904	Defects
3909	Elasticity and anelasticity
3914	Electrical properties
3919	Equations of state
3924	High-pressure behavior
3929	NMR, Mossbauer spectroscopy, and other magnetic techniques
3934	Optical, infrared, and Raman spectroscopy
3939	Physical thermodynamics
3944	Shock wave experiments
3947	Surfaces and interfaces
3949	Thermal expansivity
3954	X-ray, neutron, and electron spectroscopy and diffraction
3994	Instruments and techniques
3999	General or miscellaneous
 
4400	NONLINEAR GEOPHYSICS  (3200, 6944, 7839)
4410	Bifurcations and attractors
4415	Cascades
4420	Chaos (7805)
4425	Critical phenomena
4430	Complex systems
4435	Emergent phenomena
4440	Fractals and multifractals
4445	Nonlinear differential equations
4450	Nonlinear maps
4455	Nonlinear waves, shock waves, solitons (0689, 2487, 3280, 3285, 4275, 6934, 7851, 7852)
4460	Pattern formation
4465	Phase transitions
4468	Probability distributions, heavy and fat-tailed (3265)
4470	Renormalization group methods
4475	Scaling: spatial and temporal (1872, 3270, 4277)
4480	Self-organized criticality
4485	Self-organization
4490	Turbulence (3379, 4568, 7863)
4494	Instruments and techniques
4499	General or miscellaneous
 
4200	OCEANOGRAPHY: GENERAL
4203	Analytical modeling and laboratory experiments
4207	Arctic and Antarctic oceanography (9310, 9315)
4211	Benthic boundary layers
4215	Climate and interannual variability (1616, 1635, 3305, 3309, 4513)
4217	Coastal processes
4219	Continental shelf and slope processes (3002)
4220	Coral reef systems (4916)
4223	Descriptive and regional oceanography
4227	Diurnal, seasonal, and annual cycles (0438)
4231	Equatorial oceanography
4235	Estuarine processes (0442)
4239	Limnology (0458, 1845, 4942)
4243	Marginal and semi-enclosed seas
4247	Marine meteorology
4251	Marine pollution (0345, 0478)
4255	Numerical modeling (0545, 0560)
4259	Ocean acoustics
4260	Ocean data assimilation and reanalysis (3225)
4262	Ocean observing systems
4263	Ocean predictability and prediction (3238)
4264	Ocean optics (0649)
4271	Physical and chemical properties of seawater
4273	Physical and biogeochemical interactions
4275	Remote sensing and electromagnetic processes (0689, 2487, 3285, 4455, 6934)
4277	Time series experiments (1872, 3270, 4475)
4279	Upwelling and convergences (4964)
4283	Water masses
4294	Instruments and techniques
4299	General or miscellaneous
 
4500	OCEANOGRAPHY: PHYSICAL
4504	Air/sea interactions (0312, 3339)
4506	Capillary waves
4508	Coriolis effects
4512	Currents
4513	Decadal ocean variability (1616, 1635, 3305, 4215)
4515	Deep recirculations
4516	Eastern boundary currents
4520	Eddies and mesoscale processes
4522	ENSO (4922)
4524	Fine structure and microstructure
4528	Fronts and jets
4532	General circulation (1218, 1222)
4534	Hydrodynamic modeling
4536	Hydrography and tracers
4540	Ice mechanics and air/sea/ice exchange processes (0700, 0750, 0752, 0754)
4544	Internal and inertial waves
4546	Nearshore processes
4548	Ocean fog
4550	Ocean influence of Earth rotation (1223)
4553	Overflows
4554	Planetary waves
4556	Sea level: variations and mean (1222, 1225, 1641)
4558	Sediment transport (1862)
4560	Surface waves and tides (1222)
4562	Topographic/bathymetric interactions
4564	Tsunamis and storm surges
4568	Turbulence, diffusion, and mixing processes (4490)
4572	Upper ocean and mixed layer processes
4576	Western boundary currents
4594	Instruments and techniques
4599	General or miscellaneous
 
4800	OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL (0460)
4801	Aerosols (0305, 4906)
4803	Analytical chemistry
4802	Anoxic environments (0404, 1803, 4834, 4902)
4804	Benthic processes, benthos (0408)
4805	Biogeochemical cycles, processes, and modeling (0412, 0414, 0793, 1615, 4912)
4806	Carbon cycling (0428)
4807	Chemical speciation and complexation
4808	Chemical tracers
4811	Chemosynthesis
4809	Colloids
4813	Ecological prediction
4815	Ecosystems, structure, dynamics, and modeling (0439)
4817	Food webs, structure, and dynamics (0491)
4820	Gases
4825	Geochemistry
4830	Higher trophic levels
4832	Hydrothermal systems (0450, 1034, 3017, 3616, 8135, 8424)
4834	Hypoxic environments (0404, 4802)
4835	Marine inorganic chemistry (1050)
4840	Microbiology and microbial ecology (0465)
4843	Natural products chemistry
4845	Nutrients and nutrient cycling (0470, 1050)
4850	Marine organic chemistry (0470, 1050)
4851	Oxidation/reduction reactions (0471)
4852	Photochemistry
4853	Photosynthesis
4854	Physical chemistry
4855	Phytoplankton
4858	Population dynamics and ecology
4860	Radioactivity and radioisotopes
4863	Sedimentation (1861)
4866	Sorptive scavenging
4870	Stable isotopes (0454, 1041)
4872	Symbiosis
4875	Trace elements (0489)
4890	Zooplankton
4894	Instruments, sensors, and techniques
4899	General or miscellaneous
 
4900	PALEOCEANOGRAPHY (0473, 3344)
4901	Abrupt/rapid climate change (1605)
4902	Anthropogenic effects (1803, 4802)
4904	Atmospheric transport and circulation
4906	Aerosols (0305, 4801)
4908	Albedo
4910	Astronomical forcing
4912	Biogeochemical cycles, processes, and modeling (0412, 0414, 0793, 1615, 4805)
4914	Continental climate records
4916	Corals (4220)
4918	Cosmogenic isotopes (1150)
4920	Dendrochronology
4922	El Nino (4522)
4924	Geochemical tracers
4926	Glacial
4928	Global climate models (1626, 3337)
4930	Greenhouse gases
4932	Ice cores (0724)
4934	Insolation forcing
4936	Interglacial
4938	Interhemispheric phasing
4940	Isotopic stage
4942	Limnology (0458, 1845, 4239)
4944	Micropaleontology (0459, 3030)
4946	Milankovitch theory
4948	Paleocene/Eocene thermal maximum
4950	Paleoecology
4952	Palynology
4954	Sea surface temperature
4958	Speleothems
4960	Stadial
4962	Thermohaline
4964	Upwelling (4279)
4994	Instruments and techniques
4999	General or miscellaneous
 
5100	PHYSICAL PROPERTIES OF ROCKS
5102	Acoustic properties
5104	Fracture and flow
5109	Magnetic and electrical properties (0925)
5112	Microstructure
5114	Permeability and porosity
5120	Plasticity, diffusion, and creep
5134	Thermal properties
5139	Transport properties
5144	Wave attenuation
5194	Instruments and techniques
5199	General or miscellaneous
 
5200	PLANETARY SCIENCES: ASTROBIOLOGY
5205	Formation of stars and planets
5210	Planetary atmospheres, clouds, and hazes (0343)
5215	Origin of life
5220	Hydrothermal systems and weathering on other planets
5225	Early environment of Earth
 
5400	PLANETARY SCIENCES: SOLID SURFACE PLANETS
5405	Atmospheres (0343, 1060)
5408	Aurorae and airglow
5410	Composition (1060, 3672)
5415	Erosion and weathering
5416	Glaciation
5417	Gravitational fields (1221)
5418	Heat flow
5419	Hydrology and fluvial processes
5422	Ices
5420	Impact phenomena, cratering (6022, 8136)
5421	Interactions with particles and fields
5430	Interiors (8147)
5435	Ionospheres (2459)
5440	Magnetic fields and magnetism
5443	Magnetospheres (2756)
5445	Meteorology (3346)
5450	Orbital and rotational dynamics (1221)
5455	Origin and evolution
5460	Physical properties of materials
5462	Polar regions
5464	Remote sensing
5465	Rings and dust
5470	Surface materials and properties
5475	Tectonics (8149)
5480	Volcanism (6063, 8148, 8450)
5494	Instruments and techniques
5499	General or miscellaneous
 
5700	PLANETARY SCIENCES: FLUID PLANETS
5704	Atmospheres (0343, 1060)
5706	Aurorae
5709	Composition (1060)
5714	Gravitational fields (1221)
5719	Interactions with particles and fields
5724	Interiors (8147)
5729	Ionospheres (2459)
5734	Magnetic fields and magnetism
5737	Magnetospheres (2756)
5739	Meteorology (3346)
5744	Orbital and rotational dynamics (1221)
5749	Origin and evolution
5754	Polar regions
5759	Rings and dust
5770	Tidal forces
5780	Tori and exospheres
5794	Instruments and techniques
5799	General or miscellaneous
 
6000	PLANETARY SCIENCES: COMETS AND SMALL BODIES
6005	Atmospheres (1060)
6009	Aurorae, airglow, and X-ray emission
6008	Composition (1060)
6015	Dust
6017	Erosion and weathering
6019	Gravitational fields (1221)
6020	Ices
6022	Impact phenomena (5420, 8136)
6025	Interactions with solar wind plasma and fields
6023	Comets: dust tails and trails (6210)
6024	Interiors (8147)
6026	Ionospheres (2459)
6030	Magnetic fields and magnetism
6033	Magnetospheres (2756)
6035	Orbital and rotational dynamics
6040	Origin and evolution
6045	Physics and chemistry of materials
6050	Plasma and MHD instabilities (2149, 2752, 7836)
6055	Surfaces
6060	Radiation and chemistry
6063	Volcanism (5480, 8450)
6094	Instruments and techniques
6099	General or miscellaneous
 
6200	PLANETARY SCIENCES: SOLAR SYSTEM OBJECTS
6205	Asteroids
6206	Asteroids: satellites
6207	Comparative planetology
6210	Comets (6023)
6211	Centaurs
6213	Dust
6218	Jovian satellites
6219	Io
6221	Europa
6222	Ganymede
6223	Callisto
6220	Jupiter
6224	Kuiper belt objects
6225	Mars
6230	Martian satellites
6235	Mercury
6240	Meteorites and tektites (1028, 3662)
6245	Meteors
6250	Moon (1221)
6255	Neptune
6260	Neptunian satellites
6261	Triton
6265	Planetary rings
6270	Pluto and satellites
6275	Saturn
6280	Saturnian satellites
6281	Titan
6285	Trans-Neptunian objects
6290	Uranian satellites
6293	Uranus
6295	Venus
6296	Extra-solar planets
6297	Instruments and techniques
6299	General or miscellaneous
 
6300	POLICY SCIENCES (7964)
6304	Benefit-cost analysis
6309	Decision making under uncertainty
6314	Demand estimation
6319	Institutions
6324	Legislation and regulations (6615)
6329	Project evaluation
6334	Regional planning (1880)
6339	System design
6344	System operation and management
6349	General or miscellaneous
 
6600	PUBLIC ISSUES
6610	Funding
6615	Legislation and regulations (6324)
6620	Science policy (0485)
6630	Workforce
6699	General or miscellaneous
 
6900	RADIO SCIENCE
6914	Electromagnetic noise and interference
6924