globalchange  > 影响、适应和脆弱性
DOI: 10.1002/2016MS000788
Scopus记录号: 2-s2.0-85019028359
论文题名:
Characterizing convective cold pools
作者: Drager A; J; , van den Heever S; C
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2017
卷: 9, 期:2
起始页码: 1091
结束页码: 1115
语种: 英语
英文关键词: Atmospheric temperature ; Earth (planet) ; Heat convection ; Cloud resolving model ; Cold pool ; Density currents ; Land surface modeling ; Numerical model simulations ; Potential temperature ; Surface temperatures ; Wet patches ; Lakes ; algorithm ; cold pool ; convective cloud ; density current ; land surface ; numerical model ; potential temperature ; precipitation intensity ; rainwater ; surface temperature
英文摘要: Cold pools produced by convective storms play an important role in Earth's climate system. However, a common framework does not exist for objectively identifying convective cold pools in observations and models. The present study investigates convective cold pools within a simulation of tropical continental convection that uses a cloud-resolving model with a coupled land-surface model. Multiple variables are assessed for their potential in identifying convective cold pool boundaries, and a novel technique is developed and tested for identifying and tracking cold pools in numerical model simulations. This algorithm is based on surface rainfall rates and radial gradients in the density potential temperature field. The algorithm successfully identifies near-surface cold pool boundaries and is able to distinguish between connected cold pools. Once cold pools have been identified and tracked, composites of cold pool evolution are then constructed, and average cold pool properties are investigated. Wet patches are found to develop within the centers of cold pools where the ground has been soaked with rainwater. These wet patches help to maintain cool surface temperatures and reduce cold pool dissipation, which has implications for the development of subsequent convection. © 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/75778
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 Science, Colorado State University, Fort Collins, CO, United States

Recommended Citation:
Drager A,J,, van den Heever S,et al. Characterizing convective cold pools[J]. Journal of Advances in Modeling Earth Systems,2017-01-01,9(2)
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