气候变化领域集成服务门户(CCPortal): Deep Convective Evolution From Shallow Clouds Over the Amazon and Congo Rainforests

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DOI	10.1029/2019JD030962
	Deep Convective Evolution From Shallow Clouds Over the Amazon and Congo Rainforests
	Chakraborty S.; Jiang J.H.; Su H.; Fu R.
发表日期	2020
ISSN	2169897X
卷号	125 期号:1
英文摘要	Using satellite measurements from A-Train constellation and Global Precipitation Measurement mission, we investigate the relationships between the afternoon time shallow convective top height (CTHafternoon) and the evening time deep convective storm top height (CTHevening) and rain rate (RRevening) over the Amazon and Congo regions. We use CloudSat cloud type stratus and stratocumulus as the shallow afternoon clouds. Our results indicate that the afternoon shallow clouds over the Congo region are associated with suppressed and weakened evening time deep convection, whereas shallow clouds over the Amazon region are associated with the growth of the evening time deep convection. Over the Congo region, we find that as CTHafternoon increases, shallow convective rain rate in the afternoon (RRafternoon) increases. As a result, the evening time convective available potential energy (CAPE) as well as free tropospheric humidity (RH700-300) decrease. Consequently, condensation occurring inside deep convection reduces and CTHevening as well as RRevening decrease over there. Over the Amazon region, however, RRafternoon does not vary significantly with CTHafternoon. As CTHafternoon increases, CAPE, RH700-300, and condensation occurring inside deep convection increase in the evening. As a result, deep convective CTHevening and RRevening increase with CTHafternoon over the Amazon basin. These dissimilarities in the ambient condition drive the shallow to deep convective evolution differently over these two rainforests. On the other hand, shallow clouds that remain shallow in the evening are associated with less CAPE and RH700-300, RRafternoon, and RRevening. Although CAPE and RH700-300 promote deep convection to a height cloud top height, high vertical wind shear inhibits deep convection. ©2019. American Geophysical Union. All Rights Reserved.
英文关键词	Amazon deep convection; cloud development; Congo basin rainfall; deep convection from GPM data; equatorial African deep convection; shallow-deep convection evolution
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186245
作者单位	Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United States
推荐引用方式 GB/T 7714	Chakraborty S.,Jiang J.H.,Su H.,et al. Deep Convective Evolution From Shallow Clouds Over the Amazon and Congo Rainforests[J],2020,125(1).
APA	Chakraborty S.,Jiang J.H.,Su H.,&Fu R..(2020).Deep Convective Evolution From Shallow Clouds Over the Amazon and Congo Rainforests.Journal of Geophysical Research: Atmospheres,125(1).
MLA	Chakraborty S.,et al."Deep Convective Evolution From Shallow Clouds Over the Amazon and Congo Rainforests".Journal of Geophysical Research: Atmospheres 125.1(2020).