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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.


  
Evaluating China's anthropogenic CO2 emissions inventories: a northern China case study using continuous surface observations from 2005 to 2009 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2020, 20 (6) : 3569-3588
作者:  Dayalu, Archana;  Munger, J. William;  Wang, Yuxuan;  Wofsy, Steven C.;  Zhao, Yu;  Nehrkorn, Thomas;  Nielsen, Chris;  McElroy, Michael B.;  Chang, Rachel
收藏  |  浏览/下载：10/0  |  提交时间：2020/07/02
GEOS-S2S Version 2: The GMAO High-Resolution Coupled Model and Assimilation System for Seasonal Prediction 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2020, 125 (5)
作者:  Molod, Andrea;  Hackert, Eric;  Vikhliaev, Yury;  Zhao, Bin;  Barahona, Donifan;  Vernieres, Guillaume;  Borovikov, Anna;  Kovach, Robin M.;  Marshak, Jelena;  Schubert, Siegfried;  Li, Zhao;  Lim, Young-Kwon;  Andrews, Lauren C.;  Cullather, Richard;  Koster, Randal;  Achuthavarier, Deepthi;  Carton, James;  Coy, Lawrence;  Friere, Julliana L. M.;  Longo, Karla M.;  Nakada, Kazumi;  Pawson, Steven
收藏  |  浏览/下载：14/0  |  提交时间：2020/07/02
Atmosphere-Ocean Modeling  Atmosphere-Ocean Data Assimilation  Seasonal and Subseasonal Prediction  
Assessing Energy Budget of Laboratory Fault Slip Using Rotary Shear Experiments and Micro-Computed Tomography 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2020, 47 (1)
作者:  Zhao, Qi;  Glaser, Steven D.;  Tisato, Nicola;  Grasselli, Giovanni
收藏  |  浏览/下载：5/0  |  提交时间：2020/07/02
Large-Amplitude Mountain Waves in the Mesosphere Observed on 21 June 2014 During DEEPWAVE: 1. Wave Development, Scales, Momentum Fluxes, and Environmental Sensitivity 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2019
作者:  Taylor, Michael J.;  Pautet, Pierre-Dominique;  Fritts, David C.;  Kaifler, Bernd;  Smith, Steven M.;  Zhao, Yucheng;  Criddle, Neal R.;  McLaughlin, Pattilyn;  Pendleton, William R., Jr.;  McCarthy, Michael P.;  Hernandez, Gonzalo;  Eckermann, Stephen D.;  Doyle, James;  Rapp, Markus;  Liley, Ben;  Russell, James M., III
收藏  |  浏览/下载：9/0  |  提交时间：2019/11/27
mountain waves  mesospheric mountain waves  gravity wave breaking  optical observations  remote sensing  
Intensified inundation shifts a freshwater wetland from a CO2 sink to a source 期刊论文
GLOBAL CHANGE BIOLOGY, 2019, 25 (10) : 3319-3333
作者:  Zhao, Junbin;  Malone, Sparkle L.;  Oberbauer, Steven F.;  Olivas, Paulo C.;  Schedlbauer, Jessica L.;  Staudhammer, Christina L.;  Starr, Gregory
收藏  |  浏览/下载：9/0  |  提交时间：2019/11/27
ecosystem respiration  flooding  gross primary production  hydrology  net ecosystem CO2 exchange  wetland  
Apo epsilon 4 disrupts neurovascular regulation and undermines white matter integrity and cognitive function 期刊论文
NATURE COMMUNICATIONS, 2018, 9
作者:  Koizumi, Kenzo;  Hattori, Yorito;  Ahn, Sung Ji;  Buendia, Izaskun;  Ciacciarelli, Antonio;  Uekawa, Ken;  Wang, Gang;  Hiller, Abigail;  Zhao, Lingzhi;  Voss, Henning U.;  Paul, Steven M.;  Schaffer, Chris;  Park, Laibaik;  Iadecola, Costantino
收藏  |  浏览/下载：7/0  |  提交时间：2019/11/27
SOLAR CELLS Carrier lifetimes of > 1 mu s in Sn-Pb perovskites enable efficient all-perovskite tandem solar cells 期刊论文
SCIENCE, 2019, 364 (6439) : 475-+
作者:  Tong, Jinhui;  Song, Zhaoning;  Kim, Dong Hoe;  Chen, Xihan;  Chen, Cong;  Palmstrom, Axel F.;  Ndione, Paul F.;  Reese, Matthew O.;  Dunfield, Sean P.;  Reid, Obadiah G.;  Liu, Jun;  Zhang, Fei;  Harvey, Steven P.;  Li, Zhen;  Christensen, Steven T.;  Teeter, Glenn;  Zhao, Dewei;  Al-Jassim, Mowafak M.;  van Hest, Maikel F. A. M.;  Beard, Matthew C.;  Shaheen, Sean E.;  Berry, Joseph J.;  Yan, Yanfa;  Zhu, Kai
收藏  |  浏览/下载：8/0  |  提交时间：2019/11/27
Impacts of short-term mitigation measures on PM2.5 and radiative effects: a case study at a regional background site near Beijing, China 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2019, 19 (3) : 1881-1899
作者:  Wang, Qiyuan;  Liu, Suixin;  Li, Nan;  Dai, Wenting;  Wu, Yunfei;  Tian, Jie;  Zhou, Yaqing;  Wang, Meng;  Sai, Steven;  Ho, Hang;  Chen, Yang;  Zhang, Renjian;  Zhao, Shuyu;  Zhu, Chongshu;  Han, Yongming;  Tie, Xuexi;  Cao, Junji
收藏  |  浏览/下载：8/0  |  提交时间：2019/04/09
Characterization of VOCs and their related atmospheric processes in a central Chinese city during severe ozone pollution periods 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2019, 19 (1) : 617-638
作者:  Li, Bowei;  Ho, Steven Sai Hang;  Gong, Sunling;  Ni, Jingwei;  Li, Huairui;  Han, Liyan;  Yang, Yi;  Qi, Yijin;  Zhao, Dongxu
收藏  |  浏览/下载：7/0  |  提交时间：2019/04/09