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DOI | 10.1029/2018JD029055 |
The Dynamical Coupling of Convective Updrafts, Downdrafts, and Cold Pools in Simulated Supercell Thunderstorms | |
Marion, G. R.; Trapp, R. J. | |
2019-01-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:2页码:664-683 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The initiation of second-generation convective storms by the cold pools of first-generation storms is known to depend on cold pool characteristics such as depth and speed. It is not clear, however, how these characteristics relate back to the convective storm components and, in turn, to the environment. Here we investigate the hypothesis that wider updraft cores result in wider downdraft cores, which subsequently lead to the development of deeper cold pools that are more likely to initiate new convection. This hypothesis is addressed using a large set of idealized numerical simulations of highly organized convective storms, specifically, supercells. Quantifications of the convective components show strong interrelationships between updraft area, downdraft area, and cold pool depth, thus supporting our primary hypothesis. These interrelationships are highly sensitive to the parcel buoyancy and vertical wind shear, with large convective available potential energy, strong wind shear, and a deep mixed layer ultimately contributing to the deepest (and strongest) cold pools. Diagnoses of the forcings of vertical accelerations show that draft width, and therefore cold pool depth, are initially influenced by the buoyancy and linear dynamic forcings, but thereafter are controlled mostly by the nonlinear dynamic forcings. These results, overall, have implications on the development (or improvement) of cold pool parameterizations in weather and climate models. |
英文关键词 | cold pool supercell updraft downdraft |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000458845300013 |
WOS关键词 | VERTICAL VELOCITY EVENTS ; STORM STRUCTURE ; WIND SHEAR ; PART I ; INTENSITY ; SENSITIVITY ; IMPACT ; PRECIPITATION ; BUOYANCY ; DIAMETER |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/32518 |
专题 | 气候变化 |
作者单位 | Univ Illinois, Dept Atmospher Sci, Urbana, IL 61801 USA |
推荐引用方式 GB/T 7714 | Marion, G. R.,Trapp, R. J.. The Dynamical Coupling of Convective Updrafts, Downdrafts, and Cold Pools in Simulated Supercell Thunderstorms[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(2):664-683. |
APA | Marion, G. R.,&Trapp, R. J..(2019).The Dynamical Coupling of Convective Updrafts, Downdrafts, and Cold Pools in Simulated Supercell Thunderstorms.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(2),664-683. |
MLA | Marion, G. R.,et al."The Dynamical Coupling of Convective Updrafts, Downdrafts, and Cold Pools in Simulated Supercell Thunderstorms".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.2(2019):664-683. |
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