气候变化领域集成服务门户(CCPortal): Measurement report: Determination of aerosol vertical features on different timescales over east asia based on cats aerosol products

CCPortal

DOI	10.5194/acp-20-15307-2020
	Measurement report: Determination of aerosol vertical features on different timescales over east asia based on cats aerosol products
	Cheng Y.; Dai T.; Li J.; Shi G.
发表日期	2020
ISSN	1680-7316
起始页码	15307
结束页码	15322
卷号	20 期号:23
英文摘要	The Cloud-Aerosol Transport System (CATS) lidar, on board the International Space Station (ISS), provides a new opportunity for studying aerosol vertical distributions, especially the diurnal variations, from space observations. In this study, we investigate the seasonal variations and diurnal cycles in the vertical aerosol extinction coefficients (AECs) over East Asia by taking advantage of 32 months of continuous and uniform aerosol measurements from the CATS lidar. Over the Tibetan Plateau, a belt of AECs at approximately 6 km between 30 and 38 N persistently exists in all seasons with an obvious seasonal variation. In summer, the aerosols at 6 km are identified as a mixture of both anthropogenic aerosols transported from India and coarse dust particles from Asian dust sources. In addition, the high AECs up to 8 km in summer over the Tibetan Plateau are caused by smoke aerosols from thermal dynamic processes. In fall and winter, the northern slope of the plateau is continuously influenced by both dust aerosols and polluted aerosols transported upslope from cities located at lower elevations in northwestern Asia. The diurnal variation in AECs in North China is mainly related to the diurnal variations in the transported dust and local polluted aerosols. Below 2 km, the AEC profiles in North China at 06:00 and 12:00 CST (China standard time) are significantly higher than those at 00:00 and 18:00 CST, reaching a maximum at midday. The aerosol vertical profiles over the Tarim Desert region in summer have obvious diurnal variations, and the AECs at 12:00 and 18:00 CST are significantly higher than those at 00:00 and 06:00 CST, which are induced by the strong diurnal variations in near-surface wind speeds. In addition, the peak in the AEC profiles has a significant seasonal variation, which is mainly determined by the boundary layer height. © Author(s) 2020.
语种	英语
scopus关键词	aerosol; atmospheric transport; diurnal variation; extinction coefficient; lidar; seasonal variation; smoke; timescale; China; Qinghai-Xizang Plateau
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/247288
作者单位	Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing, China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou, China
推荐引用方式 GB/T 7714	Cheng Y.,Dai T.,Li J.,et al. Measurement report: Determination of aerosol vertical features on different timescales over east asia based on cats aerosol products[J],2020,20(23).
APA	Cheng Y.,Dai T.,Li J.,&Shi G..(2020).Measurement report: Determination of aerosol vertical features on different timescales over east asia based on cats aerosol products.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(23).
MLA	Cheng Y.,et al."Measurement report: Determination of aerosol vertical features on different timescales over east asia based on cats aerosol products".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.23(2020).