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Fossilized solidifications fronts in the Bushveld Complex argues for liquid-dominated magmatic systems 期刊论文
NATURE COMMUNICATIONS, 2020, 11 (1)
作者:  Kruger, Willem;  Latypov, Rais
收藏  |  浏览/下载：1/0  |  提交时间：2020/06/16
Reconciling global priorities for conserving biodiversity habitat 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2020, 117 (18) : 9906-9911
作者:  Mokany, Karel;  Ferrier, Simon;  Harwood, Thomas D.;  Ware, Chris;  Di Marco, Moreno;  Grantham, Hedley S.;  Venter, Oscar;  Hoskins, Andrew J.;  Watson, James E. M.
收藏  |  浏览/下载：10/0  |  提交时间：2020/05/13
community  condition  conservation  contextual intactness  ecosystem  
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.


  
Regime shifts occur disproportionately faster in larger ecosystems 期刊论文
NATURE COMMUNICATIONS, 2020, 11 (1)
作者:  Cooper, Gregory S.;  Willcock, Simon;  Dearing, John A.
收藏  |  浏览/下载：7/0  |  提交时间：2020/05/13
Understanding the role of illicit transactions in land-change dynamics 期刊论文
NATURE SUSTAINABILITY, 2020, 3 (3) : 175-181
作者:  Tellman, Beth;  Magliocca, Nicholas R.;  Turner, B. L., II;  Verburg, Peter H.
收藏  |  浏览/下载：8/0  |  提交时间：2020/05/13
Applying Information Theory and Bayesian Inference to Paleoenvironmental Interpretation 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019
作者:  Li, Haipeng;  Plink-Bjorklund, Piret
收藏  |  浏览/下载：6/0  |  提交时间：2020/02/17
Paleoenvironmental interpretation  Interpretation procedure  Information theory  Bayesian inference  
Are mercury emissions from satellite electric propulsion an environmental concern?** The data that support the findings of this study are available from the corresponding author upon reasonable request. 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2019, 14 (12)
作者:  Fourie, Dan;  Hedgecock, Ian M.;  De Simone, Francesco;  Sunderland, Elsie M.;  Pirrone, Nicola
收藏  |  浏览/下载：4/0  |  提交时间：2020/02/17
mercury pollution  satellite propulsion systems  new anthropogenic mercury source  ecosystems  atmospheric deposition  
Inferring causation from time series in Earth system sciences 期刊论文
NATURE COMMUNICATIONS, 2019, 10
作者:  Runge, Jakob;  Bathiany, Sebastian;  Bollt, Erik;  Camps-Valls, Gustau;  Coumou, Dim;  Deyle, Ethan;  Glymour, Clark;  Kretschmer, Marlene;  Mahecha, Miguel D.;  Munoz-Mari, Jordi;  van Nes, Egbert H.;  Peters, Jonas;  Quax, Rick;  Reichstein, Markus;  Scheffer, Marten;  Schoelkopf, Bernhard;  Spirtes, Peter;  Sugihara, George;  Sun, Jie;  Zhang, Kun;  Zscheischler, Jakob
收藏  |  浏览/下载：10/0  |  提交时间：2019/11/27
Biodiversity monitoring, earth observations and the ecology of scale 期刊论文
ECOLOGY LETTERS, 2018, 21 (10) : 1572-1585
作者:  Anderson, Christopher B.
收藏  |  浏览/下载：4/0  |  提交时间：2019/04/09
Biodiversity monitoring  biogeography  Earth observations  modelling  pattern  scale  spatial ecology  
Science for change: A survey on the normative and political dimensions of global sustainability research 期刊论文
GLOBAL ENVIRONMENTAL CHANGE-HUMAN AND POLICY DIMENSIONS, 2018, 52: 248-258
作者:  van der Hel, Sandra
收藏  |  浏览/下载：1/0  |  提交时间：2019/04/09
Sustainability  Transformations  Knowledge  Science  Politics  Values