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DOI	10.1016/j.envpol.2019.06.111
	Vertical distribution of the Asian tropopause aerosols detected by CALIPSO
	Niu, Hewen; Kang, Shichang; Gao, Wanni; Wang, Yuhang; Paudyal, Rukumesh
发表日期	2019
ISSN	0269-7491
EISSN	1873-6424
卷号	253
英文摘要	Characterizing the vertical distribution of aerosol optical properties is crucial to reduce the uncertainty in quantifying the radiative forcing and climate effects of aerosols. The analysis of four-year (2007-2010) Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) lidar measurements revealed the existence of tropospheric aerosol layers associated with the Asian summer monsoon. The measurements of five typical aerosol optical and microphysical parameters were used to explore the properties, spatial/vertical distributions, annual evolution of tropopause aerosols over the South Asia region. Results extracted from various latitude-height and longitude-height cross sections of aerosol extinction coefficient at 532 and 1064 nm, backscatter coefficient at 532 nm, and depolarization ratio at 532 nm demonstrated that a large amount of aerosols vertically extended up to the tropopause (12 km) during the monsoon season over the north Arabian Sea, India, north Bay of Bengal, and equatorial Indian Ocean, finally reaching the southeast of the Tibetan Plateau. Convective transport associated with Asian summer monsoon is an important factor controlling the vertical distribution of tropopause aerosols. The evolution of aerosol scattering ratio at 532 nm indicated that from equatorial Indian Ocean to South Asia, there exists an upward tilting and ascending structure of the aerosols layer during the monsoon season, which typically indicates enhanced aerosols over the Asian monsoon region. Information on aerosol size distribution and detailed composition are needed for better understanding the nature and origin of this aerosol layer. Enhancement of the tropopause aerosols should be considered in the future studies in evaluating the regional or global climate systems. Further satellite observations of aerosols and in-situ observations are also urgently needed to diagnose this aerosol layer, which likely originate from anthropogenic emissions. (C) 2019 Elsevier Ltd. All rights reserved.
关键词	Aerosol Asian summer monsoon Tropopause Vertical
学科领域	Environmental Sciences & Ecology
语种	英语
WOS研究方向	Environmental Sciences
来源期刊	ENVIRONMENTAL POLLUTION
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/112019
作者单位	Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Niu, Hewen,Kang, Shichang,Gao, Wanni,et al. Vertical distribution of the Asian tropopause aerosols detected by CALIPSO[J]. 中国科学院西北生态环境资源研究院,2019,253.
APA	Niu, Hewen,Kang, Shichang,Gao, Wanni,Wang, Yuhang,&Paudyal, Rukumesh.(2019).Vertical distribution of the Asian tropopause aerosols detected by CALIPSO.ENVIRONMENTAL POLLUTION,253.
MLA	Niu, Hewen,et al."Vertical distribution of the Asian tropopause aerosols detected by CALIPSO".ENVIRONMENTAL POLLUTION 253(2019).