气候变化领域集成服务门户(CCPortal): Observational evidence of particle hygroscopic growth in the upper troposphere-lower stratosphere (UTLS) over the Tibetan Plateau

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DOI	10.5194/acp-19-8399-2019
	Observational evidence of particle hygroscopic growth in the upper troposphere-lower stratosphere (UTLS) over the Tibetan Plateau
	He Q.; Ma J.; Zheng X.; Yan X.; Vömel H.; Wienhold F.G.; Gao W.; Liu D.; Shi G.; Cheng T.
发表日期	2019
ISSN	16807316
起始页码	8399
结束页码	8406
卷号	19 期号:13
英文摘要	We measured the vertical profiles of backscatter ratio (BSR) using the balloon-borne, lightweight Compact Optical Backscatter AerosoL Detector (COBALD) instruments above Linzhi, located in the southeastern Tibetan Plateau, in the summer of 2014. An enhanced aerosol layer in the upper troposphere-lower stratosphere (UTLS), with BSR (455nm)>1.1 and BSR (940nm)>1.4, was observed. The color index (CI) of the enhanced aerosol layer, defined as the ratio of aerosol backscatter ratios (ABSRs) at wavelengths of 940 and 455nm, varied from 4 to 8, indicating the prevalence of fine particles with a mode radius of less than 0.1μm. We find that unlike the very small particles (mode radius smaller than 0.04μm) at low relative humidity (RHi<40%), the relatively large particles in the aerosol layer were generally very hydrophilic as their size increased dramatically with relative humidity. This result indicates that water vapor can play a very important role in increasing the size of fine particles in the UTLS over the Tibetan Plateau. Our observations provide observation-based evidence supporting the idea that aerosol particle hygroscopic growth is an important factor influencing the radiative properties of the Asian Tropopause Aerosol Layer (ATAL) during the Asian summer monsoon. © Author(s) 2019.
语种	英语
scopus关键词	aerosol; color; particle size; relative humidity; stratosphere-troposphere interaction; summer; vertical profile; water vapor; China; Nyingchi; Qinghai-Xizang Plateau; Xizang
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144310
作者单位	Shanghai Meteorological Service, Shanghai, China; Shanghai Key Laboratory of Meteorology and Health, Shanghai, China; State Key Laboratory of Severe Weather, CMA Key Laboratory of Atmospheric Chemistry, Chinese Academy of Meteorological Sciences, Beijing, China; Earth Observing Laboratory, National Center for Atmospheric Research, Boulder, CO, United States; ETH Zurich, Institute for Atmospheric and Climate Science (IAC), Zurich, 8092, Switzerland; Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, China; Department of Atmospheric and Oceanic Sciences, Institute of Atmospheric Sciences, Fudan University, Shanghai, China
推荐引用方式 GB/T 7714	He Q.,Ma J.,Zheng X.,et al. Observational evidence of particle hygroscopic growth in the upper troposphere-lower stratosphere (UTLS) over the Tibetan Plateau[J],2019,19(13).
APA	He Q..,Ma J..,Zheng X..,Yan X..,Vömel H..,...&Cheng T..(2019).Observational evidence of particle hygroscopic growth in the upper troposphere-lower stratosphere (UTLS) over the Tibetan Plateau.Atmospheric Chemistry and Physics,19(13).
MLA	He Q.,et al."Observational evidence of particle hygroscopic growth in the upper troposphere-lower stratosphere (UTLS) over the Tibetan Plateau".Atmospheric Chemistry and Physics 19.13(2019).