作者
Melanie S Hammer, Aaron van Donkelaar, Chi Li, Alexei Lyapustin, Andrew M Sayer, N Christina Hsu, Robert C Levy, Michael J Garay, Olga V Kalashnikova, Ralph A Kahn, Michael Brauer, Joshua S Apte, Daven K Henze, Li Zhang, Qiang Zhang, Bonne Ford, Jeffrey R Pierce, Randall V Martin
发表日期
2020/6/3
期刊
Environmental Science & Technology
卷号
54
期号
13
页码范围
7879-7890
出版商
American Chemical Society
简介
Exposure to outdoor fine particulate matter (PM2.5) is a leading risk factor for mortality. We develop global estimates of annual PM2.5 concentrations and trends for 1998–2018 using advances in satellite observations, chemical transport modeling, and ground-based monitoring. Aerosol optical depths (AODs) from advanced satellite products including finer resolution, increased global coverage, and improved long-term stability are combined and related to surface PM2.5 concentrations using geophysical relationships between surface PM2.5 and AOD simulated by the GEOS-Chem chemical transport model with updated algorithms. The resultant annual mean geophysical PM2.5 estimates are highly consistent with globally distributed ground monitors (R2 = 0.81; slope = 0.90). Geographically weighted regression is applied to the geophysical PM2.5 estimates to predict and account for the residual bias with PM2.5 …
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MS Hammer, A van Donkelaar, C Li, A Lyapustin… - Environmental Science & Technology, 2020