globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2017MS000967
Scopus记录号: 2-s2.0-85028775543
论文题名:
The environment of aggregated deep convection
作者: Tsai W; -M; , Wu C; -M
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2017
卷: 9, 期:5
起始页码: 2061
结束页码: 2078
语种: 英语
英文关键词: Natural convection ; Aggregation process ; Cloud resolving model ; Cloud size distribution ; Degree of aggregation ; Precipitation distribution ; Segmentation methods ; Vertical wind shear ; Vorticity equation ; Three dimensional computer graphics ; algorithm ; atmospheric convection ; atmospheric modeling ; cloud ; moisture ; relative humidity ; segmentation ; size distribution ; three-dimensional modeling ; vorticity ; wind shear
英文摘要: In this study, the environment of aggregated deep convection is investigated using a vector vorticity equation cloud-resolving model (VVM). Idealized experiments are performed under various environmental moisture with or without imposed vertical wind shear. Convective aggregation is then evaluated through diagnosing the 3-D size of an individual cloud from the model output using a six-connected segmentation method. The aggregated convection is recognized by a distinct mode with larger size in the cloud-size distribution. The results suggest that aggregated convection tends to develop when column relative humidity (CRH) is larger than 80% (67%) in nonshear (shear) cases. In addition, the degree of aggregation further increases with the increase of CRH. This aggregation process may be caused by an increasing probability of multicellular cloud structure under a moister environment. The results also suggest that there are at least five convective cores of such system. Analyses of precipitation distribution suggest that the most extreme instantaneous grid point precipitation mainly occurs within the largest convective clusters. © 2017. The Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75737
Appears in Collections:影响、适应和脆弱性
气候变化与战略

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作者单位: Department of Atmospheric Sciences, National Taiwan University, Taipei, Taiwan

Recommended Citation:
Tsai W,-M,, Wu C,et al. The environment of aggregated deep convection[J]. Journal of Advances in Modeling Earth Systems,2017-01-01,9(5)
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