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Ice-supersaturated air masses in the northern mid-latitudes from regular in situ observations by passenger aircraft: vertical distribution, seasonality and tropospheric fingerprint 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2020, 20 (13) : 8157-8179
作者:  Petzold, Andreas;  Neis, Patrick;  Ruetimann, Mihal;  Rohs, Susanne;  Berkes, Florian;  Smit, Herman G. J.;  Kraemer, Martina;  Spelten, Nicole;  Spichtinger, Peter;  Nedelec, Philippe;  Wahner, Andreas
收藏  |  浏览/下载：10/0  |  提交时间：2020/07/21
Tectono-sedimentary evolution of a fossil ocean-continent transition: Tasna nappe, central Alps (SE Switzerland) 期刊论文
GEOLOGICAL SOCIETY OF AMERICA BULLETIN, 2020, 132 (7-8) : 1427-1446
作者:  Ribes, Charlotte;  Petri, Benoit;  Ghienne, Jean-Francois;  Manatschal, Gianreto;  Galster, Federico;  Karner, Garryd D.;  Figueredo, Patricio H.;  Johnson, Christopher A.;  Karpoff, Anne-Marie
收藏  |  浏览/下载：11/0  |  提交时间：2020/08/18
A seawater throttle on H-2 production in Precambrian serpentinizing systems 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2020, 117 (26) : 14756-14763
作者:  Tutolo, Benjamin M.;  Seyfried, William E., Jr.;  Tosca, Nicholas J.
收藏  |  浏览/下载：9/0  |  提交时间：2020/06/22
serpentinization  Precambrian  atmosphere redox state  origins of life  
Massive formation of early diagenetic dolomite in the Ediacaran ocean: Constraints on the "dolomite problem" 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2020, 117 (25) : 14005-14014
作者:  Chang, Biao;  Li, Chao;  Liu, Deng;  Foster, Ian;  Tripati, Aradhna;  Lloyd, Max K.;  Maradiaga, Ingrid;  Luo, Genming;  An, Zhihui;  She, Zhenbing;  Xie, Shucheng;  Tong, Jinnan;  Huang, Junhua;  Algeo, Thomas J.;  Lyons, Timothy W.;  Immenhauser, Adrian
收藏  |  浏览/下载：17/0  |  提交时间：2020/06/16
Doushantuo Formation  clumped isotope  early diagenesis  carbonate geochemistry  early oceans  
Evaluation of Southern Ocean cloud in the HadGEM3 general circulation model and MERRA-2 reanalysis using ship-based observations 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2020, 20 (11) : 6607-6630
作者:  Kuma, Peter;  Mcdonald, Adrian J.;  Morgenstern, Olaf;  Alexander, Simon P.;  Cassano, John J.;  Garrett, Sally;  Halla, Jamie;  Hartery, Sean;  Harvey, Mike J.;  Parsons, Simon;  Plank, Graeme;  Varma, Vidya;  Williams, Jonny
收藏  |  浏览/下载：9/0  |  提交时间：2020/06/09
Particulate methanesulfonic acid over the central Mediterranean Sea: Source region identification and relationship with phytoplankton activity 期刊论文
ATMOSPHERIC RESEARCH, 2020, 237
作者:  Mansour, Karam;  39;Dowd, Colin
收藏  |  浏览/下载：8/0  |  提交时间：2020/07/02
Air-Sea interaction Climate  Mediterranean Sea  Methanesulfonic acid  Chlorophyll-a  PSCF  
Analysis of sounding derived parameters and application to severe weather events in the Canary Islands 期刊论文
ATMOSPHERIC RESEARCH, 2020, 237
作者:  Suarez Molina, David;  Fernandez-Gonzalez, Sergio;  Suarez Gonzalez, Juan Carlos;  Oliver, Albert
收藏  |  浏览/下载：13/0  |  提交时间：2020/07/02
Soundings  Deep convection  Subtropical atmosphere  Severe weather events  
Influence of polluted dust on chlorophyll-a concentration and particulate organic carbon in the subarctic North Pacific Ocean based on satellite observation and the WRF-Chem simulation 期刊论文
ATMOSPHERIC RESEARCH, 2020, 236
作者:  Luo, Chenghan;  Wang, Wencai;  Sheng, Lifang;  Zhou, Yang;  Hu, Zhiyuan;  Qu, Wenjun;  Li, Xiaodong;  Hai, Shangfei
收藏  |  浏览/下载：22/0  |  提交时间：2020/07/02
Dust aerosol  Chlorophyll-a concentration  Particulate organic carbon  North Pacific Ocean  WRF-Chem model  
Hydrothermal (NN)-N-15-N-15 abundances constrain the origins of mantle nitrogen 期刊论文
NATURE, 2020, 580 (7803) : 367-+
作者:  Zhao, Steven;  Jang, Cholsoon;  Liu, Joyce;  Uehara, Kahealani;  Gilbert, Michael;  Izzo, Luke;  Zeng, Xianfeng;  Trefely, Sophie;  Fernandez, Sully;  Carrer, Alessandro;  Miller, Katelyn D.;  Schug, Zachary T.;  Snyder, Nathaniel W.;  Gade, Terence P.;  Titchenell, Paul M.;  Rabinowitz, Joshua D.;  Wellen, Kathryn E.
收藏  |  浏览/下载：14/0  |  提交时间：2020/05/13

Nitrogen is the main constituent of the Earth'  s atmosphere, but its provenance in the Earth'  s mantle remains uncertain. The relative contribution of primordial nitrogen inherited during the Earth'  s accretion versus that subducted from the Earth'  s surface is unclear(1-6). Here we show that the mantle may have retained remnants of such primordial nitrogen. We use the rare (NN)-N-15-N-15 isotopologue of N-2 as a new tracer of air contamination in volcanic gas effusions. By constraining air contamination in gases from Iceland, Eifel (Germany) and Yellowstone (USA), we derive estimates of mantle delta N-15 (the fractional difference in N-15/N-14 from air), N-2/Ar-36 and N-2/He-3. Our results show that negative delta N-15 values observed in gases, previously regarded as indicating a mantle origin for nitrogen(7-10), in fact represent dominantly air-derived N-2 that experienced N-15/N-14 fractionation in hydrothermal systems. Using two-component mixing models to correct for this effect, the (NN)-N-15-N-15 data allow extrapolations that characterize mantle endmember delta N-15, N-2/Ar-36 and N-2/He-3 values. We show that the Eifel region has slightly increased delta N-15 and N-2/Ar-36 values relative to estimates for the convective mantle provided by mid-ocean-ridge basalts(11), consistent with subducted nitrogen being added to the mantle source. In contrast, we find that whereas the Yellowstone plume has delta N-15 values substantially greater than that of the convective mantle, resembling surface components(12-15), its N-2/Ar-36 and N-2/He-3 ratios are indistinguishable from those of the convective mantle. This observation raises the possibility that the plume hosts a primordial component. We provide a test of the subduction hypothesis with a two-box model, describing the evolution of mantle and surface nitrogen through geological time. We show that the effect of subduction on the deep nitrogen cycle may be less important than has been suggested by previous investigations. We propose instead that high mid-ocean-ridge basalt and plume delta N-15 values may both be dominantly primordial features.


  
Sediment controls dynamic behavior of a Cordilleran Ice Stream at the Last Glacial Maximum 期刊论文
NATURE COMMUNICATIONS, 2020, 11 (1)
作者:  Cowan, Ellen A.;  Zellers, Sarah D.;  Mueller, Juliane;  Walczak, Maureen H.;  Worthington, Lindsay L.;  Caissie, Beth E.;  Clary, Wesley A.;  Jaeger, John M.;  Gulick, Sean P. S.;  Pratt, Jacob W.;  Mix, Alan C.;  Fallon, Stewart J.
收藏  |  浏览/下载：10/0  |  提交时间：2020/05/13