Publications

Zhao, HJ; Gui, K; Ma, YJ; Wang, YF; Wang, YQ; Wang, H; Zheng, Y; Li, L; Zhang, L; Che, HZ; Zhang, XY (2023). Seasonal evolution of aerosol loading and its vertical distribution in northeastern China from long-term satellite observations and model reanalysis. ATMOSPHERIC ENVIRONMENT, 302, 119720.

Abstract
The vertical structure of aerosols plays an important role in regional air pollution and climate change. Using long-term data on aerosol optical properties obtained through satellite observations (MODIS/Terra, MODIS/ Aqua, CALIOP) and reanalysis products (CAMS) during 2007-2021, we analysed the seasonal evolution and vertical distribution of aerosol loading in northeastern China (NEC). We also analysed the seasonal variation trends of aerosol optical depth (AOD) of aerosol species. The AODs during spring and summer were high and distributed in Liaoning (LN) with an average value of approximately 0.6, which was higher in central Jilin and southern Heilongjiang. Sulfate AOD (AOD_SO4) and organic matter AOD (AOD_OM) in NEC were higher during spring and summer (approximately 0.2), and the maximum value of dust AOD (AOD_DU) was approximately 0.1 obtained for western LN. During spring, the aerosol extinction coefficient (AEC) for NEC was high at heights below 2.0 km in LN, and its value was maximum (approximately 0.16 km-1) near the ground in LN during winter. The AEC was concentrated within 0-1 km during winter and higher within 1-3 km during spring and summer in NEC. During 2007-2021, AOD exhibited a decreasing trend, with higher average AOD during spring and summer and lower average AOD during autumn and winter. The seasonal trend of AOD in NEC exhibited a decreasing trend. BC_AOD showed the largest decline in spring, followed by DU_AOD and OM_AOD, and SO4_AOD showed a significant decline in summer. This paper presents accurate information on regional types

DOI:
10.1016/j.atmosenv.2023.119720

ISSN:
1873-2844