This Week's Most Downloaded Articles http://www.agu.org/contents/journals/ViewPublishedToday.do en-us AGU http://blogs.law.harvard.edu/tech/rss webmaster@agu.org Outline of Some Topics in Homogeneous Turbulent Flow http://dx.doi.org/10.1029/JZ064i012p02134 Stanley Corrsin Journal of Geophysical Research 64 Resolute Bay CADI ionosonde drifts, PolarDARN HF velocities, and cross polar cap potential http://dx.doi.org/10.1029/2011RS004947 D. Mori, A. V. Koustov, P. T. Jayachandran and N. Nishitani Radio Science 47 Dissolved zinc in the subarctic North Pacific and Bering Sea: Its distribution, speciation, and importance to primary producers http://dx.doi.org/10.1029/2010GB004004 Rachel Wisniewski Jakuba, Mak A. Saito, James W. Moffett and Yan Xu Global Biogeochemical Cycles 26 ON ELECTRIC CURRENTS INDUCED BY ROTATING MAGNETS, AND THEIR APPLICATION TO SOME PHENOMENA OF TERRESTRIAL MAGNETISM http://dx.doi.org/10.1029/TM001i001p00001 Arthur Schuster Terrestrial Magnetism 1 Monitoring glacier surface seismicity in time and space using Rayleigh waves http://dx.doi.org/10.1029/2011JF002259 T. D. Mikesell, K. van Wijk, M. M. Haney, J. H. Bradford, H. P. Marshall and J. T. Harper Journal of Geophysical Research 117 DIE VERTEILUNG DES ERDMAGNETISCHEN POTENTIALS IN BEZUG AUF BELIEBIGE DURCHMESSER DER ERDE http://dx.doi.org/10.1029/TM001i001p00018 Ad. Schmidt Terrestrial Magnetism 1 A Note on the Muskingum Flood-Routing Method http://dx.doi.org/10.1029/JZ064i008p01053 J. E. Nash Journal of Geophysical Research 64 Impact of wildfire on the thermal behavior of northern peatlands: Observations and model simulations http://dx.doi.org/10.1029/2011JG001910 N. Kettridge, D. K. Thompson and J. M. Waddington Journal of Geophysical Research 117 Hydromagnetic Theory of Geomagnetic Storms http://dx.doi.org/10.1029/JZ064i012p02239 A. J. Dessler and E. N. Parker Journal of Geophysical Research 64 Changes in permeability caused by transient stresses: Field observations, experiments, and mechanisms http://dx.doi.org/10.1029/2011RG000382 Michael Manga, Igor Beresnev, Emily E. Brodsky, Jean E. Elkhoury, Derek Elsworth, S. E. Ingebritsen, David C. Mays and Chi-Yuen Wang Reviews of Geophysics 50 Oceanic anoxic events and plankton evolution: Biotic response to tectonic forcing during the mid-Cretaceous http://dx.doi.org/10.1029/2001PA000623 R. Mark Leckie, Timothy J. Bralower and Richard Cashman Paleoceanography 17 Rapid switches in subpolar North Atlantic hydrography and climate during the Last Interglacial (MIS 5e) http://dx.doi.org/10.1029/2011PA002244 Nil Irvalı, Ulysses S. Ninnemann, Eirik V. Galaasen, Yair Rosenthal, Dick Kroon, Delia W. Oppo, Helga F. Kleiven, Kate F. Darling and Catherine Kissel Paleoceanography 27 Thermal and albedo mapping of Mars during the Viking primary mission http://dx.doi.org/10.1029/JS082i028p04249 Hugh H. Kieffer, T. Z. Martin, Alan R. Peterfreund, Bruce M. Jakosky, Ellis D. Miner and Frank Don Palluconi Journal of Geophysical Research 82 Imaging of lunar surface maturity http://dx.doi.org/10.1029/1999JE001110 Paul G. Lucey, David T. Blewett, G. Jeffrey Taylor and B. Ray Hawke Journal of Geophysical Research 105 Effects of the Intermediate Principal Stress on the Failure of Limestone, Dolomite, and Glass at Different Temperatures and Strain Rates http://dx.doi.org/10.1029/JZ072i002p00611 σ2 = σ3) to extension (σ3 < σ2 = σ1) tests, where subscripts denote maximum, intermediate, and minimum principal (compressive) stresses. This difference has been ascribed to the influence of σ2, but, to our knowledge, it has not previously been quantitatively demonstrated. By subjecting jacketed cylinders to combined triaxial compression or extension and torsion, one can obtain relative values of σ2 that lie between the limits σ2 = σ1 and σ2 = σ3; in torsion alone σ2 lies midway between. The data from different types of test are conveniently compared by plotting octahedral stress τoct against mean pressure Pm at fracture or yielding. Tests have been done at temperatures of 25 to 500°C, confining pressure to 10 kb, and different strain rates (10−4 to 10−7 per second) on 1- by 2-cm solid cylinders and 1.2- by 2.5-cm hollow cylinders (0.7-mm wall) of homogeneous, statistically Isotropic Solenhofen limestone, Blair dolomite, and glass. At strain rates near 10−4 per second at 25°C, the τoct versus Pm curves for limestone are essentially linear and reflect brittle behavior at relatively low pressures. In compression, failure occurs by shear fracturing; in extension and torsion, tensile fracture dominates. The shear strength is dependent upon mean pressure but tensile breaking strength is not. At intermediate pressures the curves become concave toward the Pm axis. This is associated with transitional behavior, faulting in all three types of test. This brittle-ductile transition occurs at 2.7 and 5.4 kb in compression and extension, respectively; in torsion it is near 4.0 kb. This strongly suggests that ductility is a linear function of the relative magnitude of the intermediate principal stress. At high pressures all curves tend to approach the same asymptote, τoct = constant. The results for dolomite and glass are similar. Increasing the temperature or decreasing the strain rate tends to lower the transition confining pressures for all states of stress. ]]> John Handin, H. C. Heard and J. N. Magouirk Journal of Geophysical Research 72 The Low-Latitude Ionosphere Sensor Network: Initial results http://dx.doi.org/10.1029/2011RS004978 C. E. Valladares and J. L. Chau Radio Science 47 Exceptional melt pond occurrence in the years 2007 and 2011 on the Arctic sea ice revealed from MODIS satellite data http://dx.doi.org/10.1029/2011JC007869 Anja Rösel and Lars Kaleschke Journal of Geophysical Research 117 Correction to “Interannual variability of snowmelt in the Sierra Nevada and Rocky Mountains, United States: Examples from two alpine watersheds” http://dx.doi.org/10.1029/2012WR012168 Steven M. Jepsen, Noah P. Molotch, Mark W. Williams, Karl E. Rittger and James O. Sickman Water Resources Research 48 Book Review: Opening Space Research: Dreams, Technology, and Scientific Discovery http://dx.doi.org/10.1029/2012SW000778 Gregory A. Good Space Weather: The International Journal of Research and Applications 10 Data assimilation of thermospheric mass density http://dx.doi.org/10.1029/2012SW000773 Tomoko Matsuo, Mariangel Fedrizzi, Timothy J. Fuller-Rowell and Mihail V. Codrescu Space Weather: The International Journal of Research and Applications 10 Sediment sorting and transport by flash floods http://dx.doi.org/10.1029/2003JF000067 Daniel V. Malmon, Steven L. Reneau and Thomas Dunne Journal of Geophysical Research 109 THE ALTITUDE OF THE AURORA ABOVE THE EARTH'S SURFACE http://dx.doi.org/10.1029/TM003i001p00005 Cleveland Abbe Terrestrial Magnetism 3 A detailed paleomagnetic record between 2.1 and 2.75 Ma at IODP Site U1314 in the North Atlantic: Geomagnetic excursions and the Gauss-Matuyama transition http://dx.doi.org/10.1029/2012GC004080 Masao Ohno, Tatsuya Hayashi, Fumiki Komatsu, Fumi Murakami, Meng Zhao, Yohan Guyodo, Gary Acton, Helen F. Evans and Toshiya Kanamatsu Geochemistry Geophysics Geosystems 13 Meteorological results from the surface of Mars: Viking 1 and 2 http://dx.doi.org/10.1029/JS082i028p04559 S. L. Hess, R. M. Henry, C. B. Leovy, J. A. Ryan and J. E. Tillman Journal of Geophysical Research 82 Monitoring seismic velocity change caused by the 2011 Tohoku-oki earthquake using ambient noise records http://dx.doi.org/10.1029/2012GL051405 Shohei Minato, Takeshi Tsuji, Shiro Ohmi and Toshifumi Matsuoka Geophysical Research Letters 39 Modeling the carbon fluxes of the northwest European continental shelf: Validation and budgets http://dx.doi.org/10.1029/2011JC007402 S. L. Wakelin, J. T. Holt, J. C. Blackford, J. I. Allen, M. Butenschön and Y. Artioli Journal of Geophysical Research 117 Evaluating the “critical relative humidity” as a measure of subgrid-scale variability of humidity in general circulation model cloud cover parameterizations using satellite data http://dx.doi.org/10.1029/2012JD017495 Johannes Quaas Journal of Geophysical Research 117 Field measurement of upper ocean turbulence dissipation associated with wave-turbulence interaction in the South China Sea http://dx.doi.org/10.1029/2011JC007806 Chuan Jiang Huang, Fangli Qiao, Dejun Dai, Hongyu Ma and Jingsong Guo Journal of Geophysical Research 117 Numerical simulations of the ionosphere of Mars during a solar flare http://dx.doi.org/10.1029/2011JA017399 Anthony Lollo, Paul Withers, Kathryn Fallows, Zachary Girazian, Majd Matta and P. C. Chamberlin Journal of Geophysical Research 117 First simultaneous measurement of vertical air velocity, particle fall velocity, and hydrometeor sphericity in stratiform precipitation: Results from 47 MHz wind-profiling radar and 532 nm polarization lidar observations http://dx.doi.org/10.1029/2011RS004823 0.2 m s−1) was greater than in case A (<0.1 m s−1). VZ at 300 m above the 0°C altitude in case B (1.8 m s−1) was greater than in case A (1.3 m s−1). The thickness of melting layer (ML) in case B (900 m) was greater than in case A (300 m). Because the large-sized aggregates contribute to produce greater VZ and thicker ML, it is likely that entangled growth of dendritic crystals under the presence of significant upward W and enhanced aggregation occurrence by the well-developed dendritic crystals produced the large-sized aggregates. Lidar measured an increase of linear depolarization ratio (δ) and lidar dark band in the ML. Volume δ of raindrops was 0.08–0.10 in case B and close to zero in case A. Stronger multiple scattering in case B is likely a cause that produced the greater δ. In case B, a dip of δ was measured at the bottom of ML. The decrease of hydrometeor nonsphericity at the final stage of melting explains the dip.]]> Tomoaki Mega, Masayuki K. Yamamoto, Makoto Abo, Yasukuni Shibata, Hiroyuki Hashiguchi, Noriyuki Nishi, Toyoshi Shimomai, Yoshiaki Shibagaki, Mamoru Yamamoto, Manabu D. Yamanaka, Shoichiro Fukao and Timbul Manik Radio Science 47 Catchment hydrological responses to forest harvest amount and spatial pattern http://dx.doi.org/10.1029/2010WR010165 Alex Abdelnour, Marc Stieglitz, Feifei Pan and Robert McKane Water Resources Research 47 A new global database of Mars impact craters ≥1 km: 1. Database creation, properties, and parameters http://dx.doi.org/10.1029/2011JE003966 Stuart J. Robbins and Brian M. Hynek Journal of Geophysical Research 117 Strike-slip tectonics and Quaternary basin formation along the Vienna Basin fault system inferred from Bouguer gravity derivatives http://dx.doi.org/10.1029/2011TC002979 B. C. Salcher, B. Meurers, J. Smit, K. Decker, M. Hölzel and M. Wagreich Tectonics 31 Impact of aerosols on convective clouds and precipitation http://dx.doi.org/10.1029/2011RG000369 Wei-Kuo Tao, Jen-Ping Chen, Zhanqing Li, Chien Wang and Chidong Zhang Reviews of Geophysics 50 Validation and comparison of two soil-vegetation-atmosphere transfer models for tropical Africa http://dx.doi.org/10.1029/2011JG001802 T. Akkermans, D. Lauwaet, M. Demuzere, G. Vogel, Y. Nouvellon, J. Ardö, B. Caquet, A. De Grandcourt, L. Merbold, W. Kutsch and N. Van Lipzig Journal of Geophysical Research 117 World ocean heat content and thermosteric sea level change (0–2000 m), 1955–2010 http://dx.doi.org/10.1029/2012GL051106 S. Levitus, J. I. Antonov, T. P. Boyer, O. K. Baranova, H. E. Garcia, R. A. Locarnini, A. V. Mishonov, J. R. Reagan, D. Seidov, E. S. Yarosh and M. M. Zweng Geophysical Research Letters 39 Flow and transport effects of compaction bands in sandstone at scales relevant to aquifer and reservoir management http://dx.doi.org/10.1029/2005WR004664 K. R. Sternlof, M. Karimi-Fard, D. D. Pollard and L. J. Durlofsky Water Resources Research 42 Detection of Rossby wave breaking and its response to shifts of the midlatitude jet with climate change http://dx.doi.org/10.1029/2012JD017469 Elizabeth A. Barnes and Dennis L. Hartmann Journal of Geophysical Research 117 Martian impact craters and emplacement of ejecta by surface flow http://dx.doi.org/10.1029/JS082i028p04055 M. H. Carr, L. S. Crumpler, J. A. Cutts, R. Greeley, J. E. Guest and H. Masursky Journal of Geophysical Research 82 Effect of point bar development on the local force balance governing flow in a simple, meandering gravel bed river http://dx.doi.org/10.1029/2010JF001838 C. J. Legleiter, L. R. Harrison and T. Dunne Journal of Geophysical Research 116 Volcanic eruptions and climate http://dx.doi.org/10.1029/1998RG000054 Alan Robock Reviews of Geophysics 38 Magnetic and seismic reflection study of Lake Cheko, a possible impact crater for the 1908 Tunguska Event http://dx.doi.org/10.1029/2012GC004054 L. Gasperini, L. Cocchi, C. Stanghellini, G. Stanghellini, F. Del Bianco, M. Serrazanetti and C. Carmisciano Geochemistry Geophysics Geosystems 13 Phenomenology of transionospheric pulse pairs: Further observations http://dx.doi.org/10.1029/98RS02031 Robert S. Massey, Daniel N. Holden and Xuan-Min Shao Radio Science 33 Introducing a disturbance ionosphere index http://dx.doi.org/10.1029/2011RS004939 N. Jakowski, C. Borries and V. Wilken Radio Science 47 NATURAL RESIDUAL MAGNETISM OF ERUPTIVE ROCKS http://dx.doi.org/10.1029/TE043i003p00299 J. G. Koenigsberger Terrestrial Magnetism and Atmospheric Electricity 43 The Martian ionosphere as observed by the Viking retarding potential analyzers http://dx.doi.org/10.1029/JS082i028p04351 1000°K at 250 km. An equatorward horizontal ion velocity of the order of 100–200 m/s was observed near 200 km and near the F1 peak, with a minimum velocity at intermediate heights. Both landers entered the F1 layer at a solar zenith angle near 44°, though the local times of the Viking 1 and 2 entries were 16:13 and 9:49 LT, respectively. On Viking 2, considerably more structure was observed in the height profiles of ionospheric quantities, although they were similar in shape to the Viking 1 profiles.]]> W. B. Hanson, S. Sanatani and D. R. Zuccaro Journal of Geophysical Research 82 A Pliocene-Pleistocene stack of 57 globally distributed benthic δ18O records http://dx.doi.org/10.1029/2004PA001071 Lorraine E. Lisiecki and Maureen E. Raymo Paleoceanography 20 Crustal structure of Australia from ambient seismic noise tomography http://dx.doi.org/10.1029/2011JB008403 Erdinc Saygin and B. L. N. Kennett Journal of Geophysical Research 117 Factors controlling the mode of rift interaction in brittle-ductile coupled systems: A 3D numerical study http://dx.doi.org/10.1029/2012GC004077 Vaneeda Allken, Ritske S. Huismans and Cedric Thieulot Geochemistry Geophysics Geosystems 13 PRELIMINARY REPORT ON ATMOSPHERIC POTENTIAL-GRADIENT OBSERVATIONS AT CHRISTCHURCH, NEW ZEALAND, 1928–1929 http://dx.doi.org/10.1029/TE035i003p00133 H. F. Skey Terrestrial Magnetism and Atmospheric Electricity 35 The mechanics of lubricated faults: Insights from 3-D numerical models http://dx.doi.org/10.1029/2011JB008929 Andrea Bizzarri Journal of Geophysical Research 117 Density and porosity of the lunar crust from gravity and topography http://dx.doi.org/10.1029/2012JE004062 Qian Huang and Mark A. Wieczorek Journal of Geophysical Research 117 The magnitude of the effect of air pollution on sunshine hours in China http://dx.doi.org/10.1029/2011JD016753 80, sunshine hours are on the average 0.7 h d−1 (8.4%) shorter than for days with API ≤ 80 under clear-sky condition for 2001–2005. In cities with average daily API ≤ 80 and >80 for the 2000s, sunshine hour decline for the 1960s–2000s is 0.8 h d−1 (13.4%) and 1.0 h d−1 (15.9%) respectively. Winter seasons with high API (90) exhibit the highest sunshine hour decline (21.5%). The study shows that spatiotemporal changes in sunshine hours in China could largely be explained in terms of API.]]> Yawen Wang, Yonghui Yang, Na Zhao, Chen Liu and Qinxue Wang Journal of Geophysical Research 117 Biological production in the NE Pacific and its influence on air-sea CO2 flux: Evidence from dissolved oxygen isotopes and O2/Ar http://dx.doi.org/10.1029/2011JC007450 L. W. Juranek, P. D. Quay, R. A. Feely, D. Lockwood, D. M. Karl and M. J. Church Journal of Geophysical Research 117 A REPRESENTATION OF THE SUNSPOT-CYCLE http://dx.doi.org/10.1029/TE044i002p00175 C. N. Anderson Terrestrial Magnetism and Atmospheric Electricity 44 Airborne validation of cirrus cloud properties derived from CALIPSO lidar measurements: Optical properties http://dx.doi.org/10.1029/2011JD017053 Dennis L. Hlavka, John E. Yorks, Stuart A. Young, Mark A. Vaughan, Ralph E. Kuehn, Matthew J. McGill and Sharon D. Rodier Journal of Geophysical Research 117 The formation of Valles Marineris: 2. Stress focusing along the buried dichotomy boundary http://dx.doi.org/10.1029/2011JE003954 Jeffrey C. Andrews-Hanna Journal of Geophysical Research 117 Nadir observations of sprites from the International Space Station http://dx.doi.org/10.1029/2003JA009972 E. Blanc, T. Farges, R. Roche, D. Brebion, T. Hua, A. Labarthe and V. Melnikov Journal of Geophysical Research 109 A SUMMARY OF THE RESULTS OF THE RECENT MAGNETIC SURVEY OF GREAT BRITAIN AND IRELAND CONDUCTED BY PROFESSORS RÜCKER AND THORPE. PART III: ON THE RELATION BETWEEN THE MAGNETIC AND THE GEOLOGICAL CONSTITUTION OF GREAT BRITAIN AND IRELAND http://dx.doi.org/10.1029/TM001i003p00125 A. W. Rücker Terrestrial Magnetism 1 On the probability of occurrence of extreme space weather events http://dx.doi.org/10.1029/2011SW000734 30 MeV proton fluences as inferred from nitrate records) to estimate the probability of occurrence of extreme events. By showing that the frequency of occurrence scales as an inverse power of the severity of the event, and assuming that this relationship holds at higher magnitudes, we are able to estimate the probability that an event larger than some criteria will occur within a certain interval of time in the future. For example, the probability of another Carrington event (based on Dst < −850 nT) occurring within the next decade is ∼12%. We also identify and address several limitations with this approach. In particular, we assume time stationarity, and thus, the effects of long-term space climate change are not considered. While this technique cannot be used to predict specific events, it may ultimately be useful for probabilistic forecasting.]]> Pete Riley Space Weather: The International Journal of Research and Applications 10 Structure of the atmosphere of Mars in summer at mid-latitudes http://dx.doi.org/10.1029/JS082i028p04364 Alvin Seiff and Donn B. Kirk Journal of Geophysical Research 82 Soil O2 controls denitrification rates and N2O yield in a riparian wetland http://dx.doi.org/10.1029/2011JG001799 Amy J. Burgin and Peter M. Groffman Journal of Geophysical Research 117 Experimental alluvial fan evolution: Channel dynamics, slope controls, and shoreline growth http://dx.doi.org/10.1029/2011JF002261 Meredith D. Reitz and Douglas J. Jerolmack Journal of Geophysical Research 117 Little Ice Age cold interval in West Antarctica: Evidence from borehole temperature at the West Antarctic Ice Sheet (WAIS) Divide http://dx.doi.org/10.1029/2012GL051260 Anais J. Orsi, Bruce D. Cornuelle and Jeffrey P. Severinghaus Geophysical Research Letters 39 Decrease of dissolved oxygen after the mid-1980s in the western North Pacific subtropical gyre along the 137°E repeat section http://dx.doi.org/10.1029/2011GB004227 50% of the DO decrease. In the NPIW core at roughly 26.8 σθ (∼700 m), the decline in DO was attributable to the DO decrease in the formation region. In the OML between 27.0 σθ and 27.3 σθ (∼1000 m), the DO decrease likely resulted from an increase in westward transport of low O2 water due to strengthening of the subtropical gyre. The result of this study shows the importance of the long-term and high-frequency along the 137°E repeat section.]]> Yusuke Takatani, Daisuke Sasano, Toshiya Nakano, Takashi Midorikawa and Masao Ishii Global Biogeochemical Cycles 26 Kinematic evolution of Andean fold-thrust structures along the boundary between the Eastern Cordillera and Middle Magdalena Valley basin, Colombia http://dx.doi.org/10.1029/2011TC003089 Javier Sánchez, Brian K. Horton, Eliseo Tesón, Andrés Mora, Richard A. Ketcham and Daniel F. Stockli Tectonics 31 River channel slope, flow resistance, and gravel entrainment thresholds http://dx.doi.org/10.1029/2011WR010850 Robert I. Ferguson Water Resources Research 48 Historical land use change and associated carbon emissions in Brazil from 1940 to 1995 http://dx.doi.org/10.1029/2011GB004133 Christiane Cavalcante Leite, Marcos Heil Costa, Britaldo Silveira Soares-Filho and Letícia de Barros Viana Hissa Global Biogeochemical Cycles 26 Forcing, feedbacks and climate sensitivity in CMIP5 coupled atmosphere-ocean climate models http://dx.doi.org/10.1029/2012GL051607 Timothy Andrews, Jonathan M. Gregory, Mark J. Webb and Karl E. Taylor Geophysical Research Letters 39 13C constraints on ocean carbon cycle models http://dx.doi.org/10.1029/2010GB003980 Rolf E. Sonnerup and Paul D. Quay Global Biogeochemical Cycles 26 OLD MAGNETIC DECLINATIONS http://dx.doi.org/10.1029/TM001i001p00039 W. van Bemmelen Terrestrial Magnetism 1 High-resolution mantle tomography of China and surrounding regions http://dx.doi.org/10.1029/2005JB004066 Jinli Huang and Dapeng Zhao Journal of Geophysical Research 111 The seismic coupling of subduction zones revisited http://dx.doi.org/10.1029/2011JB009003 Christopher H. Scholz and Jaime Campos Journal of Geophysical Research 117 Numerical investigation of deformation mechanics in fold-and-thrust belts: Influence of rheology of single and multiple décollements http://dx.doi.org/10.1029/2011TC003047 Jonas B. Ruh, Boris J. P. Kaus and Jean-Pierre Burg Tectonics 31 Particle Coatings Affecting the Wettability of Soils http://dx.doi.org/10.1029/JZ064i002p00263 Bessel D. van't Woudt Journal of Geophysical Research 64 Paleoceanography of the Atlantic-Mediterranean exchange: Overview and first quantitative assessment of climatic forcing http://dx.doi.org/10.1029/2011RG000376 M. Rogerson, E. J. Rohling, G. R. Bigg and J. Ramirez Reviews of Geophysics 50 Spatial and temporal variability of biogenic isoprene emissions from a temperate estuary http://dx.doi.org/10.1029/2011GB004210 D. A. Exton, D. J. Suggett, M. Steinke and T. J. McGenity Global Biogeochemical Cycles 26 Simulating streamflow and dissolved organic matter export from a forested watershed http://dx.doi.org/10.1029/2011WR011423 Na Xu, James E. Saiers, Henry F. Wilson and Peter A. Raymond Water Resources Research 48 Electric Fields Preceding Cloud-to-Ground Lightning Flashes http://dx.doi.org/10.1029/JC087iC07p04883 William Beasley, Martin A. Uman and P. L. Rustan Journal of Geophysical Research 87 Generation of 100-year geomagnetically induced current scenarios http://dx.doi.org/10.1029/2011SW000750 A. Pulkkinen, E. Bernabeu, J. Eichner, C. Beggan and A. W. P. Thomson Space Weather: The International Journal of Research and Applications 10 Geodetic observations detecting coseismic displacements and gravity changes caused by the Mw = 9.0 Tohoku-Oki earthquake http://dx.doi.org/10.1029/2011JB008849 Xin Zhou, Wenke Sun, Bin Zhao, Guangyu Fu, Jie Dong and Zhaosheng Nie Journal of Geophysical Research 117 Effect of spectral-dependent surface albedo on Saharan dust direct radiative forcing http://dx.doi.org/10.1029/2012GL051360 Xiaoyan Ma and Fangqun Yu Geophysical Research Letters 39 The 15N natural abundance of the N lost from an N-saturated subtropical forest in southern China http://dx.doi.org/10.1029/2010JG001615 Keisuke Koba, Yunting Fang, Jiangming Mo, Wei Zhang, Xiankai Lu, Lei Liu, Tao Zhang, Yu Takebayashi, Sakae Toyoda, Naohiro Yoshida, Keisuke Suzuki, Muneoki Yoh and Keishi Senoo Journal of Geophysical Research 117 How well do we know recent climate trends at the tropical tropopause? http://dx.doi.org/10.1029/2012JD017444 James S. Wang, Dian J. Seidel and Melissa Free Journal of Geophysical Research 117 Tectonic and climatic controls on knickpoint retreat rates and landscape response times http://dx.doi.org/10.1029/2011JF002157 Alexander C. Whittaker and Sarah J. Boulton Journal of Geophysical Research 117 Morphometric analysis of small-scale lobate scarps on the Moon using data from the Lunar Reconnaissance Orbiter http://dx.doi.org/10.1029/2011JE003907 M. E. Banks, T. R. Watters, M. S. Robinson, L. L. Tornabene, T. Tran, L. Ojha and N. R. Williams Journal of Geophysical Research 117 The source of the steep plasma density gradient in middle latitudes during the 11–12 April 2001 storm http://dx.doi.org/10.1029/2011JA017349 S. Park, K.-H. Kim, H. Kil, G. Jee, D.-H. Lee and J. Goldstein Journal of Geophysical Research 117 Computer simulations on sprite initiation for realistic lightning models with higher-frequency surges http://dx.doi.org/10.1029/2008JA013651 T. Asano, T. Suzuki, Y. Hiraki, E. Mareev, M. G. Cho and M. Hayakawa Journal of Geophysical Research 114 High-precision isotopic characterization of USGS reference materials by TIMS and MC-ICP-MS http://dx.doi.org/10.1029/2006GC001283 Dominique Weis, Bruno Kieffer, Claude Maerschalk, Jane Barling, Jeroen de Jong, Gwen A. Williams, Diane Hanano, Wilma Pretorius, Nadine Mattielli, James S. Scoates, Arnaud Goolaerts, Richard M. Friedman and J. Brian Mahoney Geochemistry Geophysics Geosystems 7 EVALUATION AND INTERPRETATION OF THE COLUMNAR RESISTANCE OF THE ATMOSPHERE http://dx.doi.org/10.1029/TE049i003p00159 O. H. Gish Terrestrial Magnetism and Atmospheric Electricity 49 AIMANTATION INDUITE PAR LE CHAMP TERRESTRE SUR LES AIMANTS http://dx.doi.org/10.1029/TE004i001p00001 Par M. E. Mascart Terrestrial Magnetism and Atmospheric Electricity 4 The geochemical evolution of the continental crust http://dx.doi.org/10.1029/95RG00262 Stuart Ross Taylor and Scott M. McLennan Reviews of Geophysics 33 Did geomagnetic activity challenge electric power reliability during solar cycle 23? Evidence from the PJM regional transmission organization in North America http://dx.doi.org/10.1029/2011SW000752 Kevin F. Forbes and O. C. St. Cyr Space Weather: The International Journal of Research and Applications 10 Alpine inversion of the North African margin and delamination of its continental lithosphere http://dx.doi.org/10.1029/2011TC002989 François Roure, Piero Casero and Belkacem Addoum Tectonics 31 Effects of sampling and mineral separation on accuracy of detrital zircon studies http://dx.doi.org/10.1029/2012GC004106 Jiří Sláma and Jan Košler Geochemistry Geophysics Geosystems 13 Modeling ring current ion and electron dynamics and plasma instabilities during a high-speed stream driven storm http://dx.doi.org/10.1029/2011JA017433 4RE) radial distances on the nightside during the storm main phase, the particles' drift velocities increase, the ion and electron fluxes are reduced and the ring current is confined closer to Earth. In contrast to ions, the electron fluxes increase closer to Earth and the fractional electron energy reaches ∼20% near storm peak due to better electron trapping in a nondipolar magnetic field. The ring current contribution to Dst calculated using Biot-Savart integration differs little from the DPS relation except during quiet time. RAM-SCB simulations underestimate ∣SYM-H∣ minimum by ∼25% but reproduce very well the storm recovery phase. Increased anisotropies develop in the ion and electron velocity distributions in a self-consistent magnetic field due to energy dependent drifts, losses, and dispersed injections. There is sufficient free energy to excite whistler mode chorus, electromagnetic ion cyclotron (EMIC), and magnetosonic waves in the equatorial magnetosphere. The linear growth rate of whistler mode chorus intensifies in the postmidnight to noon sector, EMIC waves are predominantly excited in the afternoon to midnight sector, and magnetosonic waves are excited over a broad MLT range both inside and outside the plasmasphere. The wave growth rates in a dipolar magnetic field have significantly smaller magnitude and spatial extent.]]> V. K. Jordanova, D. T. Welling, S. G. Zaharia, L. Chen and R. M. Thorne Journal of Geophysical Research 117 Climatic responses to tropical sea surface temperature changes on a “greenhouse” Earth http://dx.doi.org/10.1029/1999PA000455 30°C) tropical SSTs may be realistic for greenhouse climate intervals, including the Eocene. ]]> Matthew Huber and L. Cirbus Sloan Paleoceanography 15 Controls on in situ oxygen and dissolved inorganic carbon dynamics in peats of a temperate fen http://dx.doi.org/10.1029/2011JG001888 Cristian Estop-Aragonés, Klaus-Holger Knorr and Christian Blodau Journal of Geophysical Research 117 Paleocean circulation during the Last Deglaciation: A bipolar seesaw? http://dx.doi.org/10.1029/97PA03707 Wallace S. Broecker Paleoceanography 13 Contrasting rift and subduction-related plagiogranites in the Jinshajiang ophiolitic mélange, southwest China, and implications for the Paleo-Tethys http://dx.doi.org/10.1029/2011TC002937 Jian-Wei Zi, Peter A. Cawood, Wei-Ming Fan, Yue-Jun Wang and Eric Tohver Tectonics 31