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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：33/0  |  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：48/0  |  提交时间：2020/06/16
tropical deep convection  shear-parallel convective systems  cold pools  wind shear  idealized simulations  multiscale interactions  
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：57/0  |  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.


  
Spatial and seasonal variation of rainfall contribution by the height spectrum of precipitation systems and associated cloud bulk properties over the South Asia 期刊论文
INTERNATIONAL JOURNAL OF CLIMATOLOGY, 2019
作者:  Roy, Partha;  Biswasharma, Rupraj;  Deshamukhya, Atri;  Sharma, Sanjay
收藏  |  浏览/下载：31/0  |  提交时间：2020/02/17
Deep Convective Systems  Height Spectrum  Intense Convective Systems  Rainfall  
Spatiotemporal Characteristics and Large-Scale Environments of Mesoscale Convective Systems East of the Rocky Mountains 期刊论文
JOURNAL OF CLIMATE, 2019, 32 (21) : 7303-7328
作者:  Feng, Zhe;  Houze, Robert A., Jr.;  Leung, L. Ruby;  Song, Fengfei;  Hardin, Joseph C.;  Wang, Jingyu;  Gustafson, William I., Jr.;  Homeyer, Cameron R.
收藏  |  浏览/下载：33/0  |  提交时间：2019/11/27
Deep convection  Precipitation  Convective storms  Mesoscale systems  Storm environments  Radars  Radar observations  
Modeling the Transient Response of Tropical Convection to Mesoscale SST Variations 期刊论文
JOURNAL OF THE ATMOSPHERIC SCIENCES, 2019, 76 (5) : 1227-1244
作者:  Skyllingstad, Eric D.;  39;Neill, Larry W.
收藏  |  浏览/下载：26/0  |  提交时间：2019/11/26
Atmosphere-ocean interaction  Convective storms  systems  Convective-scale processes  Deep convection  Mesoscale processes  
Deep Convective Organization, Moisture Vertical Structure, and Convective Transition Using Deep-Inflow Mixing 期刊论文
JOURNAL OF THE ATMOSPHERIC SCIENCES, 2019, 76 (4) : 965-987
作者:  Schiro, Kathleen A.;  Neelin, J. David
收藏  |  浏览/下载：29/0  |  提交时间：2019/11/26
Deep convection  Entrainment  Mesoscale systems  Convective-scale processes  Humidity  Hydrologic cycle  
Identifying the Sources of Convective Memory in Cloud-Resolving Simulations 期刊论文
JOURNAL OF THE ATMOSPHERIC SCIENCES, 2019, 76 (3) : 947-962
作者:  Colin, Maxime;  Sherwood, Steven;  Geoffroy, Olivier;  Bony, Sandrine;  Fuchs, David
收藏  |  浏览/下载：25/0  |  提交时间：2019/04/09
Tropics  Deep convection  Radiative-convective equilibrium  Mesoscale systems  Cloud resolving models  Convective parameterization  
A study of the spatio-temporal variability of the properties of intense precipitation features over the South Asian region: an integrated multisensor approach 期刊论文
INTERNATIONAL JOURNAL OF CLIMATOLOGY, 2017, 37
作者:  Roy, Partha;  Biswasharma, Rupraj;  Deshamukhya, Atri;  Sharma, Sanjay;  Gairola, Rakesh M.
收藏  |  浏览/下载：25/0  |  提交时间：2019/04/09
deep convective systems  intense deep convective systems  echo top height  cloud microphysics