气候变化领域集成服务门户(CCPortal): In situ measurements and backward-trajectory analysis of high-concentration, fine-mode aerosols in the UTLS over the Tibetan Plateau

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DOI	10.1088/1748-9326/ab5a9f
	In situ measurements and backward-trajectory analysis of high-concentration, fine-mode aerosols in the UTLS over the Tibetan Plateau
	Zhang J.; Wu X.; Liu S.; Bai Z.; Xia X.; Chen B.; Zong X.; Bian J.
发表日期	2019
ISSN	17489318
卷号	14 期号:12
英文摘要	An aerosol layer in the upper troposphere and lower stratosphere over the Asian summer monsoon (ASM) regions, namely, the Asian tropopause aerosol layer (ATAL), has been observed based on satellite remote sensing and in situ measurements; however, its source is still under debate. In August 2018, an experimental campaign over the Tibetan Plateau at Golmud (GLM, 36.48 °N, 94.93 °E) was performed, during which a balloon-borne Portable Optical Particle Counter was used to measure the aerosol particle profile. Backward-trajectory simulations were conducted with the Massive-Parallel Trajectory Calculations model to investigate the possible sources and transport pathways of the observed particles. The in situ measurements showed a robust ATAL around the tropopause, 16 km above sea level, with a maximum aerosol number density of 35 cm-3 and a maximum aerosol mass concentration of 0.15 μg m-3 for particles with diameters between 0.14 and 3 μm. The aerosol particles in the ATAL are mostly smaller than 0.25 μm in diameter, accounting for 98% of all aerosol particles detected. The backward-trajectory analysis revealed that the air parcels arrived at the altitude of the ATAL through two separate pathways: (1) the uplift below the 360 K isentropic surface, where air parcels were first elevated to the upper troposphere and then joined the ASM anticyclonic circulation; and (2) the quasi-horizontal transport along the anticyclonic circulation, located approximately between the 360 and 420 K isentropic surfaces. The complex transport pathways may aggravate the challenge of analyzing the composition of the ATAL, and further observation campaigns are required to extend our knowledge. © 2019 The Author(s). Published by IOP Publishing Ltd.
英文关键词	Asian summer monsoon; Fine-mode aerosols; In situ measurements; Tibetan plateau; Upper troposphere and lower stratosphere
语种	英语
scopus关键词	Atmospheric thermodynamics; Clouds; Remote sensing; Sea level; Trajectories; Troposphere; Aerosol mass concentration; Asian summer monsoons; Backward trajectory analysis; In-situ measurement; Lower stratosphere; Optical particle counters; Satellite remote sensing; Tibetan Plateau; Aerosols; aerosol; aerosol composition; altitude; concentration (composition); in situ measurement; monsoon; remote sensing; stratosphere-troposphere interaction; trajectory; China; Golmud; Qinghai; Qinghai-Xizang Plateau
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154257
作者单位	Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, 210044, China; University of Chinese Academy of Sciences, Beijing, 100049, China; School of Earth and Space Sciences, University of Science and Technology of China, Hefei, ANHUI, 230026, China; Key Lab. of Atmosph. Environ. and Processes in the Boundary Layer over the Low-Latitude Plateau Reg., Department of Atmospheric Science, Yunnan University, Kunming, 650091, China
推荐引用方式 GB/T 7714	Zhang J.,Wu X.,Liu S.,et al. In situ measurements and backward-trajectory analysis of high-concentration, fine-mode aerosols in the UTLS over the Tibetan Plateau[J],2019,14(12).
APA	Zhang J..,Wu X..,Liu S..,Bai Z..,Xia X..,...&Bian J..(2019).In situ measurements and backward-trajectory analysis of high-concentration, fine-mode aerosols in the UTLS over the Tibetan Plateau.Environmental Research Letters,14(12).
MLA	Zhang J.,et al."In situ measurements and backward-trajectory analysis of high-concentration, fine-mode aerosols in the UTLS over the Tibetan Plateau".Environmental Research Letters 14.12(2019).