Simulation of aerosol radiative forcing based on blue sky albedo
WANG Heng-yang1, LI Xiang-chen1, WANG Shuang2, TANG Hong-zhao3
1. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China; 2. Jilin Emergency Warning Information Dissemination Center, Changchun 130062, China; 3. Land Satellite Remote Sensing Application Center, Ministry of Natural Resources, Beijing 100048, China
Abstract：This article calculated the blue sky albedo using MODIS shortwave Black Sky Albedo (BSA) and White Sky Albedo (WSA) data combined with the 6S radiation transfer model simulated sky scattering light proportion factors. Based on the aerosol optical depths (AOD), particle size distribution, and complex refractive index data from the AERONET station in Baotou, the 6S radiation transfer model was used to simulate the surface (SFC) and top of atmosphere (TOA) ARF from 2018 to 2021. The differences between different types of albedos (BSA and WSA) and different aerosol models ARF and the true ARF were compared. The results showed that the average TOA ARF was (1.54±3.8)W/m2, and its value was related to the surface albedo and single scattering albedo (SSA). The continental and urban TOA ARF were positive values, about 2.2 and 8.6 times the real value, respectively. The desert TOA ARF was mostly negative, and in some months with large albedo, it was positive. The average SFC ARF was (-30.39±9.5)W/m2, with lower absolute values in summer and autumn. The continental, urban and desert SFC ARF were about 1.1, 1.76 and 0.77 times the real value, respectively, and different aerosol models had little effect on SFC ARF. The results of the three wavelengths method simulation of black carbon (BC) ARF showed that the average SFC and TOA BCARF were (-6.82±4.3)W/m2 and (2.23±1.5)W/m2, respectively, and SFC BCARF accounts for 7.3% to 40.4% of the total SFC ARF, with a higher proportion in summer.
王恒阳, 李祥琛, 王爽, 唐洪钊. 基于蓝天空反照率的气溶胶辐射强迫模拟[J]. 中国环境科学, 2023, 43(9): 4469-4477.
WANG Heng-yang, LI Xiang-chen, WANG Shuang, TANG Hong-zhao. Simulation of aerosol radiative forcing based on blue sky albedo. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(9): 4469-4477.
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