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Annual Seminar to focus on challenging physics in seamless predictions 新闻
来源平台：European Centre for Medium-Range Weather Forecasts. 发布日期：2022
作者:  admin
收藏  |  浏览/下载：10/0  |  提交时间：2022/06/24
Kelvin Waves during GOAmazon and Their Relationship to Deep Convection 期刊论文
Journal of the Atmospheric Sciences, 2020
作者:  Serra, Yolande L.;  Rowe, Angela;  Adams, David K.;  Kiladis, George N.
收藏  |  浏览/下载：6/0  |  提交时间：2020/10/12
Simulations shows magnetic field can change 10 times faster than previously thought 新闻
来源平台：EurekAlert. 发布日期：2020
作者:  admin
收藏  |  浏览/下载：1/0  |  提交时间：2020/07/07
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.


  
Modelling convective precipitation – progress and challenges 新闻
来源平台：European Centre for Medium-Range Weather Forecasts. 发布日期：2019
作者:  admin
收藏  |  浏览/下载：7/0  |  提交时间：2020/01/16
GoAmazon2014/5 campaign points to deep-inflow approach to deep convection across scales 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2018, 115 (18) : 4577-4582
作者:  Schiro, Kathleen A.;  Ahmed, Fiaz;  Giangrande, Scott E.;  Neelin, J. David
收藏  |  浏览/下载：6/0  |  提交时间：2019/11/27
tropical precipitation  moist convection  mesoscale convective system  convective parameterization  entrainment  
Tiny pollutants intensify storms in the Amazon 新闻
来源平台：SciDev.Net. 发布日期：2018
作者:  admin
收藏  |  浏览/下载：3/0  |  提交时间：2019/04/17
Rediscovery of the doldrums in storm-resolving simulations over the tropical Atlantic 期刊论文
NATURE GEOSCIENCE, 2017, 10 (12)
作者:  Klocke, Daniel;  Brueck, Matthias;  Hohenegger, Cathy;  Stevens, Bjorn
收藏  |  浏览/下载：4/0  |  提交时间：2019/04/09
How to model convection and its impact on weather 新闻
来源平台：European Centre for Medium-Range Weather Forecasts. 发布日期：2017
作者:  admin
收藏  |  浏览/下载：4/0  |  提交时间：2019/04/16
Top NWP experts mark Research Director’s departure 新闻
来源平台：European Centre for Medium-Range Weather Forecasts. 发布日期：2017
作者:  admin
收藏  |  浏览/下载：1/0  |  提交时间：2019/04/16