气候变化领域集成服务门户(CCPortal): Observational Quantification of Aerosol Invigoration for Deep Convective Cloud Lifecycle Properties Based on Geostationary Satellite

CCPortal

DOI	10.1029/2020JD034275
	Observational Quantification of Aerosol Invigoration for Deep Convective Cloud Lifecycle Properties Based on Geostationary Satellite
	Pan Z.; Rosenfeld D.; Zhu Y.; Mao F.; Gong W.; Zang L.; Lu X.
发表日期	2021
ISSN	2169897X
卷号	126 期号:9
英文摘要	Aerosols affect cloud microstructure, dynamics, and precipitation by acting as cloud condensation nuclei (CCN) and ice nuclei with a large uncertainty for deep convective clouds (DCCs). Here, we quantify the relationships between aerosols and DCC properties after isolating aerosol impacts from meteorology based on the METEOSAT geostationary satellite and Modern-Era Retrospective Analysis for Research and Application Version 2 (MERRA-2) reanalysis data. Results show that fine aerosols (radius <1 µm), which serve as the best proxy for CCN from MERRA-2, exhibit the strongest aerosol invigoration for DCC compared with aerosol optical depth and coarse aerosols. Overall, added fine aerosols result in colder cloud top temperatures (CTTs), longer lifetime, and more rainfall amounts, especially over land. As CTT decreases monotonically with added aerosols, cloud lifetime and rainfall amount reach a maximum at aerosol loading of 5 and 1.5 µg/m3 over land and ocean, respectively. Added precipitable water (PW) vapor and convective available potential energy (CAPE) are conducive to the development of more vigorous DCC. For fixed PW and CAPE, CTT decreases by up to −12.2°C ± 0.5°C with fine aerosol concentration over land and up to −4.4°C ± 1.0°C over ocean. The DCC lifetime is lengthened by a factor of 1.3 ± 0.1 from clean condition to optimal aerosol loading over land. A respective enhancement in rainfall amounts over land is indicated by a factor of 2.6 ± 0.4. The decreases in lifetime and rainfall beyond the optimal aerosol concentration are likely due to less aerosol wet scavenging from smaller and less rainy DCCs. The increases in the lifetime and rainfall amounts over ocean are much weaker. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	aerosol; deep convective cloud; geostationary satellite; lifetime; rainfall amount
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/185241
作者单位	Institute of Earth Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel; State Key Laboratory of Information Engineering in Surveying, Mapping, and Remote Sensing, Wuhan University, Wuhan, China; School of Atmospheric Sciences, Nanjing University, Nanjing, China; Joint International Research Laboratory of Atmospheric and Earth System Sciences & Institute for Climate and Global Change Research, Nanjing University, Nanjing, China; School of Remote Sensing and Information Engineering, Wuhan University, Wuhan, China; School of Electronic Information, Wuhan University, Wuhan, China; Chinese Antarctic Centre of Surveying and Mapping, Wuhan University, Wuhan, China
推荐引用方式 GB/T 7714	Pan Z.,Rosenfeld D.,Zhu Y.,et al. Observational Quantification of Aerosol Invigoration for Deep Convective Cloud Lifecycle Properties Based on Geostationary Satellite[J],2021,126(9).
APA	Pan Z..,Rosenfeld D..,Zhu Y..,Mao F..,Gong W..,...&Lu X..(2021).Observational Quantification of Aerosol Invigoration for Deep Convective Cloud Lifecycle Properties Based on Geostationary Satellite.Journal of Geophysical Research: Atmospheres,126(9).
MLA	Pan Z.,et al."Observational Quantification of Aerosol Invigoration for Deep Convective Cloud Lifecycle Properties Based on Geostationary Satellite".Journal of Geophysical Research: Atmospheres 126.9(2021).