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DOI10.1016/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
ISSN1352-2310
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 depthBoundary layerCOVID-19 lockdownLidar
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
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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).
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