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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  
Tracking long-distance migration of marine fishes using compound-specific stable isotope analysis of amino acids 期刊论文
ECOLOGY LETTERS, 2020, 23 (5) : 881-890
作者:  Matsubayashi, Jun;  Osada, Yutaka;  Tadokoro, Kazuaki;  Abe, Yoshiyuki;  Yamaguchi, Atsushi;  Shirai, Kotaro;  Honda, Kentaro;  Yoshikawa, Chisato;  Ogawa, Nanako O.;  Ohkouchi, Naohiko;  Ishikawa, Naoto F.;  Nagata, Toshi;  Miyamoto, Hiroomi;  Nishino, Shigeto;  Tayasu, Ichiro
收藏  |  浏览/下载：9/0  |  提交时间：2020/07/02
Bering Sea Shelf  copepods  isoscape  migration  North Pacific  salmon  delta N-15(Base)  
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：9/0  |  提交时间：2020/05/13
Glacial Melt and Potential Impacts on Water Resources in the Canadian Rocky Mountains 期刊论文
WATER RESOURCES RESEARCH, 2019, 55 (12) : 10191-10217
作者:  Castellazzi, P.;  Burgess, D.;  Rivera, A.;  Huang, J.;  Longuevergne, L.;  Demuth, M. N.
收藏  |  浏览/下载：8/0  |  提交时间：2020/02/16
Illuminating seafloor faults and ocean dynamics with dark fiber distributed acoustic sensing 期刊论文
SCIENCE, 2019, 366 (6469) : 1103-+
作者:  Lindsey, Nathaniel J.;  Dawe, T. Craig;  Ajo-Franklin, Jonathan B.
收藏  |  浏览/下载：14/0  |  提交时间：2020/02/17
Towards the integration of animal-borne instruments into global ocean observing systems 期刊论文
GLOBAL CHANGE BIOLOGY, 2019
作者:  March, David;  Boehme, Lars;  Tintore, Joaquin;  Joaquin Velez-Belchi, Pedro;  Godley, Brendan J.
收藏  |  浏览/下载：10/0  |  提交时间：2020/02/17
animal-borne instruments  Argo  global ocean observing system  marine vertebrates  multi-platform ocean observation  operational oceanography  pinnipeds  satellite tracking  sea turtles  
Satellites will address critical science priorities for quantifying ocean carbon 期刊论文
FRONTIERS IN ECOLOGY AND THE ENVIRONMENT, 2020, 18 (1) : 27-34
作者:  Shutler, Jamie D.;  Wanninkhof, Rik;  Nightingale, Philip D.;  Woolf, David K.;  Bakker, Dorothee C. E.;  Watson, Andy;  Ashton, Ian;  Holding, Thomas;  Chapron, Bertrand;  Quilfen, Yves;  Fairall, Chris;  Schuster, Ute;  Nakajima, Masakatsu;  Donlon, Craig J.
收藏  |  浏览/下载：7/0  |  提交时间：2019/11/27
Assimilation of Satellite Altimetry Data for Effective River Bathymetry 期刊论文
WATER RESOURCES RESEARCH, 2019, 55 (9) : 7441-7463
作者:  Breda, J. P. L. F.;  Paiva, R. C. D.;  Bravo, J. M.;  Passaia, O. A.;  Moreira, D. M.
收藏  |  浏览/下载：8/0  |  提交时间：2019/11/27
Kalman filter  satellite altimetry  hydrodynamic model  effective bathymetry  water surface elevation  data assimilation