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氮含量增加的河流温室气体排放机理 快报文章
资源环境快报，2021年第22期
作者:  李恒吉
Microsoft Word(17Kb)  |  收藏  |  浏览/下载：656/1  |  提交时间：2021/12/01
NSF  The nitrogen cycle  
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.


  
Angiosperm symbioses with non-mycorrhizal fungal partners enhance N acquisition from ancient organic matter in a warming maritime Antarctic 期刊论文
ECOLOGY LETTERS, 2019
作者:  Hill, Paul W.;  Broughton, Richard;  Bougoure, Jeremy;  Havelange, William;  Newsham, Kevin K.;  Grant, Helen;  Murphy, Daniel, V;  Clode, Peta;  Ramayah, Soshila;  Marsden, Karina A.;  Quilliam, Richard S.;  Roberts, Paula;  Brown, Caley;  Read, David J.;  Deluca, Thomas H.;  Bardgett, Richard D.;  Hopkins, David W.;  Jones, Davey L.
收藏  |  浏览/下载：6/0  |  提交时间：2019/11/27
carbon cycle  climate change  dark septate endophytes  enantiomers  nitrogen cycle  polar  soil  
Dissolved Organic Nitrogen Production and Export by Meridional Overturning in the Eastern Subpolar North Atlantic 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (7) : 3832-3842
作者:  Fernandez-Castro, Bieito;  Alvarez, Marta;  Nieto-Cid, Mar;  Zunino, Patricia;  Mercier, Herle;  Anton Alvarez-Salgado, Xose
收藏  |  浏览/下载：8/0  |  提交时间：2019/11/26
dissolved organic matter  nitrogen cycle  meridional overturning circulation  subpolar North Atlantic  metabolic balance  
Effects of anthropogenic nitrogen discharge on dissolved inorganic nitrogen transport in global rivers 期刊论文
GLOBAL CHANGE BIOLOGY, 2019, 25 (4) : 1493-1513
作者:  Liu, Shuang;  Xie, Zhenghui;  Zeng, Yujin;  Liu, Bin;  Li, Ruichao;  Wang, Yan;  Wang, Longhuan;  Qin, Peihua;  Jia, Binghao;  Xie, Jinbo
收藏  |  浏览/下载：7/0  |  提交时间：2019/04/09
earth system model  global biogeochemical cycle  human activities  land surface model  riverine nitrogen transport  water pollution  
Elevated CO2 does not stimulate carbon sink in a semi-arid grassland 期刊论文
ECOLOGY LETTERS, 2019, 22 (3) : 458-468
作者:  Song, Jian;  Wan, Shiqiang;  Piao, Shilong;  Hui, Dafeng;  Hovenden, Mark J.;  Ciais, Philippe;  Liu, Yongwen;  Liu, Yinzhan;  Zhong, Mingxing;  Zheng, Mengmei;  Ma, Gaigai;  Zhou, Zhenxing;  Ru, Jingyi
收藏  |  浏览/下载：12/0  |  提交时间：2019/04/09
Carbon cycle  climate warming  CO2 enrichment  forb  grass  increased precipitation  modelling  multi-factor experiment  nitrogen addition  species composition  
Global photosynthetic capacity is optimized to the environment 期刊论文
ECOLOGY LETTERS, 2019, 22 (3) : 506-517
作者:  Smith, Nicholas G.;  Keenan, Trevor F.;  Colin Prentice, I.;  Wang, Han;  Wright, Ian J.;  Niinemets, Ulo;  Crous, Kristine Y.;  Domingues, Tomas F.;  Guerrieri, Rossella;  Ishida, F. Yoko;  Kattge, Jens;  Kruger, Eric L.;  Maire, Vincent;  Rogers, Alistair;  Serbin, Shawn P.;  Tarvainen, Lasse;  Togashi, Henrique F.;  Townsend, Philip A.;  Wang, Meng;  Weerasinghe, Lasantha K.;  Zhou, Shuang-Xi
收藏  |  浏览/下载：12/0  |  提交时间：2019/04/09
Carbon cycle  Carboxylation  coordination  ecophysiology  electron transport  Jmax  light availability  nitrogen availability  temperature  V-cmax  
Global soil nitrous oxide emissions since the preindustrial era estimated by an ensemble of terrestrial biosphere models: Magnitude, attribution, and uncertainty 期刊论文
GLOBAL CHANGE BIOLOGY, 2019, 25 (2) : 640-659
作者:  Tian, Hanqin;  Yang, Jia;  Xu, Rongting;  Lu, Chaoqun;  Canadell, Josep G.;  Davidson, Eric A.;  Jackson, Robert B.;  Arneth, Almut;  Chang, Jinfeng;  Ciais, Philippe;  Gerber, Stefan;  Ito, Akihiko;  Joos, Fortunat;  Lienert, Sebastian;  Messina, Palmira;  Olin, Stefan;  Pan, Shufen;  Peng, Changhui;  Saikawa, Eri;  Thompson, Rona L.;  Vuichard, Nicolas;  Winiwarter, Wilfried;  Zaehle, Soenke;  Zhang, Bowen
收藏  |  浏览/下载：17/0  |  提交时间：2019/04/09
global nitrogen cycle  greenhouse gas emission  nitrous oxide  process-based modeling  soil N2O emission  
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