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Impacts of Aerosol and Environmental Conditions on Maritime and Continental Deep Convective Systems Using a Bin Microphysical Model 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2020, 125 (12)
作者:  Iguchi, Takamichi;  Rutledge, Steven A.;  Tao, Wei-Kuo;  Matsui, Toshi;  Dolan, Brenda;  Lang, Stephen E.;  Barnum, Julie
收藏  |  浏览/下载：9/0  |  提交时间：2020/08/18
aerosol and clouds  deep convective systems  mesoscale modeling  spectral bin microphysics  
Shear-Parallel Tropical Convective Systems: Importance of Cold Pools and Wind Shear 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2020, 47 (12)
作者:  Grant, Leah D.;  Moncrieff, Mitchell W.;  Lane, Todd P.;  van den Heever, Susan C.
收藏  |  浏览/下载：9/0  |  提交时间：2020/06/16
tropical deep convection  shear-parallel convective systems  cold pools  wind shear  idealized simulations  multiscale interactions  
A 20-Year Climatology of Madden-Julian Oscillation Convection: Large-Scale Precipitation Tracking From TRMM-GPM Rainfall 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2020, 125 (7)
作者:  Kerns, Brandon W.;  Chen, Shuyi S.
收藏  |  浏览/下载：7/0  |  提交时间：2020/07/02
MJO  rainfall  tropical  tracking  
Assessing Convective Organization in Tropical Radar Observations 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2020, 125 (7)
作者:  Retsch, M. H.;  Jakob, C.;  Singh, M. S.
收藏  |  浏览/下载：5/0  |  提交时间：2020/07/02
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.


  
Observed Warm-Season Characteristics of MCS and Non-MCS Rainfall and Their Recent Changes in the Central United States 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2020, 47 (6)
作者:  Hu, Huancui;  Leung, L. Ruby;  Feng, Zhe
收藏  |  浏览/下载：8/0  |  提交时间：2020/07/02
Large-Scale Characteristics of Tropical Convective Systems Through the Prism of Cloud Regime 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2020, 125 (6)
作者:  Jin, Daeho;  Oreopoulos, Lazaros;  Lee, Dongmin;  Tan, Jackson;  Kim, Kyu-myong
收藏  |  浏览/下载：10/0  |  提交时间：2020/07/02
tropical convection  cloud-precipitation  synoptic scale  cloud regime  
Aerosol Impacts on Mesoscale Convective Systems Forming Under Different Vertical Wind Shear Conditions 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2020, 125 (3)
作者:  Chen, Qian;  Fan, Jiwen;  Yin, Yan;  Han, Bin
收藏  |  浏览/下载：6/0  |  提交时间：2020/07/02
Trumpet-Shaped Topography Modulation of the Frequency, Vertical Structures, and Water Path of Cloud Systems in the Summertime Over the Southeastern Tibetan Plateau: A Perspective of Daytime-Nighttime Differences 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2020, 125 (3)
作者:  Yu, Lu;  Fu, YunFei;  Yang, Yuanjian;  Pan, Xiao;  Tan, Ruiting
收藏  |  浏览/下载：6/0  |  提交时间：2020/07/02
The Roles of Mineral Dust as Cloud Condensation Nuclei and Ice Nuclei During the Evolution of a Hail Storm 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2019, 124 (24) : 14262-14284
作者:  Chen, Qian;  Yin, Yan;  Jiang, Hui;  Chu, Zhigang;  Xue, Lulin;  Shi, Rulin;  Zhang, Xin;  Chen, Jinghua
收藏  |  浏览/下载：9/0  |  提交时间：2020/02/17
cloud condensation nuclei  ice nuclei  hail storm  bin microphysics  aerosol indirect effect