中文版 | English

在结果中检索

GSTDTAP

浏览/检索结果: 共36条，第1-10条 帮助

已选(0)清除 条数/页：   排序方式：
PNNL研究人员构建了一个新的全球风暴数据库 快报文章
地球科学快报，2021年第13期
作者:  王立伟
Microsoft Word(14Kb)  |  收藏  |  浏览/下载：482/0  |  提交时间：2021/07/08
Mesoscale convective systems, MCSs  storm database  
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：18/0  |  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：34/0  |  提交时间：2020/06/16
tropical deep convection  shear-parallel convective systems  cold pools  wind shear  idealized simulations  multiscale interactions  
Characteristics of low-level meso-gamma-scale vortices in the warm season over East China 期刊论文
ATMOSPHERIC RESEARCH, 2020, 235
作者:  Tang, Ying;  Xu, Xin;  Xue, Ming;  Tang, Jianping;  Wang, Yuan
收藏  |  浏览/下载：23/0  |  提交时间：2020/07/02
Meso-gamma-scale vortices  Convective systems  Radar climatology  East China  
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.


  
Quasigeostrophic Controls on Precipitating Ascent in Monsoon Depressions 期刊论文
JOURNAL OF THE ATMOSPHERIC SCIENCES, 2020, 77 (4) : 1213-1232
作者:  Murthy, Varun S.;  Boos, William R.
收藏  |  浏览/下载：16/0  |  提交时间：2020/07/02
Tropics  Convective storms  systems  Vertical motion  Monsoons  Precipitation  Vortices  
Are Supercells Resistant to Entrainment because of Their Rotation? 期刊论文
JOURNAL OF THE ATMOSPHERIC SCIENCES, 2020, 77 (4) : 1475-1495
作者:  Peters, John M.;  Nowotarski, Christopher J.;  Mullendore, Gretchen L.
收藏  |  浏览/下载：10/0  |  提交时间：2020/07/02
Clouds  Convective storms  systems  Updrafts  downdrafts  Severe storms  Storm environments  
Anthropogenic Aerosols Significantly Reduce Mesoscale Convective System Occurrences and Precipitation Over Southern China in April 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2020, 47 (6)
作者:  Zhang, Lijuan;  Fu, Tzung-May;  Tian, Heng;  Ma, Yaping;  Chen, Jen-Ping;  Tsai, Tzu-Chin;  Tsai, I-Chun;  Meng, Zhiyong;  Yang, Xin
收藏  |  浏览/下载：38/0  |  提交时间：2020/07/02
anthropogenic aerosols  precipitation  mesoscale convective systems  aerosol-cloud interactions  aerosol-radiation interactions  
Radar Reflectivity of Lightning Flashes in Stratiform Regions of Mesoscale Convective Systems 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2019, 124 (24) : 14114-14132
作者:  Wang, Fei;  Liu, Hengyi;  Dong, Wansheng;  Zhang, Yijun;  Yao, Wen;  Zheng, Dong
收藏  |  浏览/下载：17/0  |  提交时间：2020/02/17
lightning flash initiation  stratiform regions  mesoscale convective systems  reflectivity  bright band  in situ electrification  
Simulating a Mesoscale Convective System Using WRF With a New Spectral Bin Microphysics: 1: Hail vs Graupel 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2019, 124 (24) : 14072-14101
作者:  Shpund, Jacob;  Khain, Alexander;  Lynn, Barry;  Fan, Jiwen;  Han, Bin;  Ryzhkov, Alexander;  Snyder, Jeffrey;  Dudhia, Jimy;  Gill, Dave
收藏  |  浏览/下载：36/0  |  提交时间：2020/02/17
mesoscale convective systems (MCS)  squall lines  spectral bin microphysics  large hail  in-cloud nucleation  size distributions of hydrometeors in MCS