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美研究指出热带气旋或将影响全球气候 快报文章
资源环境快报，2023年第13期
作者:  薛明媚,王金平
Microsoft Word(17Kb)  |  收藏  |  浏览/下载：561/1  |  提交时间：2023/07/15
Tropical Cyclones  Turbulence  Ocean Mixing  
Subpolar marginal seas fuel the North Pacific through the intermediate water at the termination of the ocean circulation 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2020, 117 (23) : 12665-12673
作者:  Nishioka, Jun;  Obata, Hajime;  Ogawa, Hiroshi;  Ono, Kazuya;  Yamashita, Youhei;  Lee, Keunjong;  Takeda, Shigenobu;  Yasuda, Ichiro
收藏  |  浏览/下载：27/0  |  提交时间：2020/06/01
dissolved iron  macronutrients  North Pacific Ocean  island chains mixing  GEOTRACES  
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：34/0  |  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.


  
Middle Holocene expansion of Pacific Deep Water into the Southern Ocean 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2020, 117 (2) : 889-894
作者:  Struve, Torben;  Wilson, David J.;  van de Flierdt, Tina;  Pratt, Naomi;  Crocket, Kirsty C.
收藏  |  浏览/下载：14/0  |  提交时间：2020/05/13
Southern Ocean  cold-water corals  neodymium isotopes  Holocene  water mass mixing  
Global Stokes Drift Climate under the RCP8.5 Scenario 期刊论文
JOURNAL OF CLIMATE, 2019, 32 (6) : 1677-1691
作者:  Breivik, Oyvind;  Carrasco, Ana;  Staneva, Joanna;  Behrens, Arno;  Semedo, Alvaro;  Bidlot, Jean-Raymond;  Aarnes, Ole Johan
收藏  |  浏览/下载：15/0  |  提交时间：2019/04/09
Wave properties  Waves, oceanic  Mixing  Oceanic mixed layer  Climate models  Ocean models  
Oceanic Overturning and Heat Transport: The Role of Background Diffusivity 期刊论文
JOURNAL OF CLIMATE, 2019, 32 (3) : 701-716
作者:  Hieronymus, Magnus;  Nycander, Jonas;  Nilsson, Johan;  Doos, Kristofer;  Hallberg, Robert
收藏  |  浏览/下载：13/0  |  提交时间：2019/04/09
Diapycnal mixing  Diffusion  Ocean circulation  Energy transport  
Rapid mixing and exchange of deep-ocean waters in an abyssal boundary current 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (27) : 13233-13238
作者:  Garabato, Alberto C. Naveira;  Frajka-Williams, Eleanor E.;  Spingys, Carl P.;  Legg, Sonya;  Polzin, Kurt L.;  Forryan, Alexander;  Abrahamsen, E. Povl;  Buckingham, Christian E.;  Griffies, Stephen M.;  McPhail, Stephen D.;  Nicholls, Keith W.;  Thomas, Leif N.;  Meredith, Michael P.
收藏  |  浏览/下载：19/0  |  提交时间：2019/11/27
ocean mixing  overturning circulation  submesoscale instabilities  turbulence  
Flux Correction and Overturning Stability: Insights from a Dynamical Box Model 期刊论文
JOURNAL OF CLIMATE, 2018, 31 (22) : 9335-9350
作者:  Gnanadesikan, Anand;  Kelson, Richard;  Sten, Michaela
收藏  |  浏览/下载：11/0  |  提交时间：2019/04/09
Meridional overturning circulation  Mixing  Ocean dynamics  Climate variability  
The Effect of Air-Sea Flux Products, Shortwave Radiation Depth Penetration, and Albedo on the Upper Ocean Overturning Circulation 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2018, 45 (17) : 9087-9097
作者:  Groeskamp, Sjoerd;  Iudicone, Daniele
收藏  |  浏览/下载：13/0  |  提交时间：2019/04/09
water mass transformation  air-sea fluxes  upper ocean circulation  Chlorophyll a  biogeochemistry  mixing  
Seasonal Variation in the Correlation Between Anomalies of Sea Level and Chlorophyll in the Antarctic Circumpolar Current 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2018, 45 (10) : 5011-5019
作者:  Song, Hajoon;  Long, Matthew C.;  Gaube, Peter;  Frenger, Ivy;  Marshall, John;  McGillicuddy, Dennis J., Jr.
收藏  |  浏览/下载：15/0  |  提交时间：2019/04/09
mesoscale eddy  vertical mixing  chlorophyll  Southern Ocean  iron  light