气候变化领域集成服务门户(CCPortal): Long-term variations of aerosol optical properties over Wuhan with polarization lidar

CCPortal

DOI	10.1016/j.atmosenv.2021.118508
	Long-term variations of aerosol optical properties over Wuhan with polarization lidar
	Yin Z.; Yi F.; Liu F.; He Y.; Zhang Y.; Yu C.; Zhang Y.
发表日期	2021
ISSN	1352-2310
卷号	259
英文摘要	Aerosols greatly impact the global and regional climate system and public health. We conducted lidar measurements at Wuhan (30.53°N, 114.37°E) from October 2010 to June 2020 and analyzed the massive dataset with an automatic lidar processing algorithm, to investigate the long-term variations of aerosols. Lidar-derived total aerosol optical depth (AOD) at 532 nm shows an interannual decrease of −0.049 since 2010. Compared with AODs in other megacities worldwide, the AOD for Wuhan shows the largest decrease rate. After separating AOD contributions from boundary layer (BL) and free troposphere (FT), different evolution patterns are revealed with AOD decrease rates of −0.009 and −0.044 per year for FT and BL, respectively, which indicates more than 80% of AOD decrease are associated with reductions of local emissions. In addition, BL AOD was always larger than FT AOD before COVID-19 lockdown. However, this relation was conversed thereafter, with the lowest value of 0.125 for BL AOD since 2010, which is only the half of FT AOD within the same period. This feature corroborates strong influences of COVID-19 lockdown on human activities and local emissions. These findings can improve our understandings of regional aerosol responses to pollution controls and aerosol direct impacts on regional climate. © 2021 Elsevier Ltd
关键词	Aerosol optical depth Boundary layer COVID-19 lockdown Lidar
语种	英语
scopus关键词	Boundary layers; Optical properties; Optical radar; Pollution control; Aerosol optical depths; Aerosol optical property; Climate system; COVID-19 lockdown; Decrease rate; Free troposphere; Global climates; Lidar measurements; Local emissions; Regional climate; Aerosols; aerosol; algorithm; boundary layer; COVID-19; data set; lidar; long-term change; optical depth; polarization; public health; China; Hubei; Wuhan
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248372
作者单位	School of Electronic Information, Wuhan University, Wuhan, China; Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan, China; State Observatory for Atmospheric Remote Sensing, Wuhan, China
推荐引用方式 GB/T 7714	Yin Z.,Yi F.,Liu F.,et al. Long-term variations of aerosol optical properties over Wuhan with polarization lidar[J],2021,259.
APA	Yin Z..,Yi F..,Liu F..,He Y..,Zhang Y..,...&Zhang Y..(2021).Long-term variations of aerosol optical properties over Wuhan with polarization lidar.ATMOSPHERIC ENVIRONMENT,259.
MLA	Yin Z.,et al."Long-term variations of aerosol optical properties over Wuhan with polarization lidar".ATMOSPHERIC ENVIRONMENT 259(2021).