Artigo de peri??dico
Simultaneous profiling of dust aerosol mass concentration and optical properties with polarized high-spectral-resolution lidar
Registro en:
0048-9697
872
10.1016/j.scitotenv.2023.162091
0000-0002-9691-5306
90.7
94.25
Autor
XIAO, DA
WANG, NANCHAO
CHEN, SIJIE
WU, LINGYUN
MULLER, DETLEF
VESELOVSKII, IGOR
LI, CHENGCAI
LANDULFO, EDUARDO
SIVAKUMAR, VENKATARAMAN
LI, JING
CHE, HUIZHENG
FANG, JING
ZHANG, KAI
WANG, BINYU
CHEN, FEITONG
HU, XIANZHE
LI, XIAOTAO
LI, WEIZE
TONG, YICHENG
KE, JU
WU, LAN
LIU, CHONG
LIU, DONG
Resumen
Dust particles originating from arid desert regions can be transported over long distances, presenting severe risks to climate, environment, social economics, and human health at the source and downwind regions. However, there has been a dearth of continuous diurnal observations of vertically resolved mass concentration and optical properties of dust aerosols, which hinders our understanding of aerosol mixing, stratification, aerosol-cloud interactions, and their impacts on the environment. To fill the gap of the insufficient observations, to the best of our knowledge, this work presents the first high-spectral-resolution lidar (HSRL) observation providing days of continuous profiles of the mass concentration, along with particle linear depolarization ratio (PLDR), backscattering coefficient, extinction coefficient and lidar ratio (LR), simultaneously. We present the results of two strong dust events observed by HSRL over Beijing in 2021. The maximum particle mass concentrations reached (1.52 ?? 3.5) x103 ??g/m3 and (19.48 ?? 0.36) x103 ??g/m3 for the two dust events, respectively. The retrieved particle mass concentrations and aerosol optical depth (AOD) agree well with the observation from the surface PM10 concentrations and sun photometer with correlation coefficients of 0.90 and 0.95, respectively. The intensive properties of PLDR and LR of the dust aerosols are 0.31 ?? 0.02 and 39 ?? 7 sr at 532 nm, respectively, which are generally close to those obtained from observations in the downwind areas. Moreover, inspired by the observations from HSRL, a universal analytical relationship is discovered to evaluate the proportion of dust aerosol backscattering, extinction, AOD, and mass concentration using PLDR. The universal analytical relationship reveals that PLDR can directly quantify dust aerosol contribution, which is expected to further expand the application of polarization technology in dust detection. These valuable observations and findings further our understanding of the contribution of dust aerosol to the environment and help supplement dust aerosol databases. Zhejiang Provincial Natural Science Foundation of China National Key Research and Development Program of China Fundamental Research Funds for the Central Universities State Key Laboratory of Modern Optical Instrumentation Innovation Program Russian Science Foundation (RSF) Zhejiang Provincial Natural Science Foundation of China: LR19D050001 National Key Research and Development Program of China: 2016YFC0200700 Fundamental Research Funds for the Central Universities: 2021XZZX019 State Key Laboratory of Modern Optical Instrumentation Innovation Program: MOI2020ZD02 RSF: 21-17-00114