[口头报告]Estimating the Columnar Concentrations of Black Carbon Aerosols in China Using MODIS Products

Estimating the Columnar Concentrations of Black Carbon Aerosols in China Using MODIS Products
编号:3568 稿件编号:1956 访问权限:私有 更新:2023-04-16 15:32:54 浏览:165次 口头报告

报告开始:2023年05月07日 14:20 (Asia/Shanghai)

报告时间:15min

所在会议:[14C] 14C、气溶胶与大气环境 » [14C-3] 14C-3 气溶胶与大气环境

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摘要
Black carbon (BC), the strongest light-absorbing particle, is believed to play substantial roles in regional air quality and global climate change. In this study, taking advantage of the high quality of moderate resolution imaging spectroradiometer products, we developed a new algorithm to estimate the BC columnar concentrations over China by simulating the BC and non-BC aerosol mixing states in detail. The results show that our new algorithm produces a reliable estimation of BC aerosols, in which BC columnar concentrations and their related parameters (aerosol absorption and BC surface concentration) show reasonable agreements and low biases compared with ground-based measurements. The uncertainties of BC retrievals are mainly associated with the surface and aerosol assumptions used in the algorithm, ranging from −14 to 44% at higher aerosol optical depth (AOD > 0.5). The proposed algorithm can improve the capability of space-borne aerosol remote sensing by successfully distinguishing BC from other aerosols. The acquired BC columnar concentrations enable the spatial pattern of serious BC aerosol pollution over East China to be characterized, showing that it exhibits higher levels in winter. These nationwide results are beneficial for estimating BC emissions, proposing mitigation strategies for air pollution, and potentially reducing the uncertainties of climate change studies.
关键字
Black Carbon,MODIS,aerosols,satellite,remote sensing
报告人
包方闻
研究助理教授 南方科技大学

稿件作者
包方闻 南方科技大学
李莹 南方科技大学
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