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Global reconstruction reduces the uncertainty of oceanic nitrous oxide emissions and reveals a vigorous seasonal cycle 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2020, 117 (22) : 11954-11960
作者:  Yang, Simon;  Chang, Bonnie X.;  Warner, Mark J.;  Weber, Thomas S.;  Bourbonnais, Annie M.;  Santoro, Alyson E.;  Kock, Annette;  Sonnerup, Rolf E.;  Bullister, John L.;  Wilson, Samuel T.;  Bianchi, Daniele
收藏  |  浏览/下载：13/0  |  提交时间：2020/05/20
nitrous oxide  air-sea gas exchange  seasonal variability  nitrogen cycle  greenhouse gases  
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.


  
Nitrogen isotope evidence for expanded ocean suboxia in the early Cenozoic 期刊论文
SCIENCE, 2019, 364 (6438) : 386-+
作者:  Kast, Emma R.;  Stolper, Daniel A.;  Auderset, Alexandra;  Higgins, John A.;  Ren, Haojia;  Wang, Xingchen T.;  Martinez-Garcia, Alfredo;  Haug, Gerald H.;  Sigman, Daniel M.
收藏  |  浏览/下载：7/0  |  提交时间：2019/11/27
Microbial ecosystem dynamics drive fluctuating nitrogen loss in marine anoxic zones 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (15) : 7220-7225
作者:  Penn, Justin L.;  Weber, Thomas;  Chang, Bonnie X.;  Deutsch, Curtis
收藏  |  浏览/下载：15/0  |  提交时间：2019/11/27
microbial ecology  oxygen minimum zones  nitrogen cycle  species oscillations  
Complete arsenic-based respiratory cycle in the marine microbial communities of pelagic oxygen-deficient zones 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (20) : 9925-9930
作者:  Saunders, Jaclyn K.;  Fuchsman, Clara A.;  McKay, Cedar;  Rocap, Gabrielle
收藏  |  浏览/下载：9/0  |  提交时间：2019/11/27
oxygen deficient zones  arsenic  chemoautotrophy  dissimilatory arsenate reduction  marine metagenome  
Metabolic preference of nitrate over oxygen as an electron acceptor in foraminifera from the Peruvian oxygen minimum zone 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (8) : 2860-2865
作者:  Glock, Nicolaas;  Roy, Alexandra-Sophie;  Romero, Dennis;  Wein, Tanita;  Weissenbach, Julia;  Revsbech, Niels Peter;  Hogslund, Signe;  Clemens, David;  Sommer, Stefan;  Dagan, Tal
收藏  |  浏览/下载：7/0  |  提交时间：2019/11/27
eukaryotic denitrification  foraminifera  oxygen minimum zone  nitrogen cycle  
Disentangling the role of photosynthesis and stomatal conductance on rising forest water-use efficiency 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (34) : 16909-16914
作者:  Guerrieri, Rossella;  Belmecheri, Soumaya;  Ollinger, Scott V.;  Asbjornsen, Heidi;  Jennings, Katie;  Xiao, Jingfeng;  Stocker, Benjamin D.;  Martin, Mary;  Hollinger, David Y.;  Bracho-Garrillo, Rosvel;  Clark, Kenneth;  Dore, Sabina;  Kolb, Thomas;  Munger, J. William;  Novick, Kimberly;  Richardson, Andrew D.
收藏  |  浏览/下载：16/0  |  提交时间：2019/11/27
tree rings  stable isotopes  water-use efficiency  AmeriFlux  CO2 fertilization  
Limited oxygen production in the Mesoarchean ocean 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (14) : 6647-6652
作者:  Ossa, Frantz Ossa;  Hofmann, Axel;  Spangenberg, Jorge E.;  Poulton, Simon W.;  Stueken, Eva E.;  Schoenberg, Ronny;  Eickmann, Benjamin;  Wille, Martin;  Butler, Mike;  Bekker, Andrey
收藏  |  浏览/下载：6/0  |  提交时间：2019/11/27
oxygen oasis  nitrogen isotopes  nutrient limitation  oxygenic photosynthesis  Mesoarchean  
Natural forcing of the North Atlantic nitrogen cycle in the Anthropocene 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2018, 115 (42) : 10606-10611
作者:  Wang, Xingchen Tony;  Cohen, Anne L.;  Luu, Victoria;  Ren, Haojia;  Su, Zhan;  Haug, Gerald H.;  Sigman, Daniel M.
收藏  |  浏览/下载：7/0  |  提交时间：2019/11/27
North Atlantic  nitrogen cycle  Anthropocene  atmospheric deposition  
Transient surface ocean oxygenation recorded in the similar to 2.66-Ga Jeerinah Formation, Australia 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2018, 115 (30) : 7711-7716
作者:  Koehler, Matthew C.;  Buick, Roger;  Kipp, Michael A.;  Stueken, Eva E.;  Zaloumis, Jonathan
收藏  |  浏览/下载：6/0  |  提交时间：2019/11/27
Neoarchean  nitrogen isotopes  oxygenation  selenium