Update of SO2 emission inventory in the Megacity of Chongqing, China by inverse modeling

Chongqing, a metropolitan with over 32 million residents in southwest China, has suffered from SO2 pollution since 1980s. The emission inventory is an important tool to evaluate the and design effective reduction policies. present work developed scheme update obsolescent Chongqing obtained Multi-resolution Emission Inventory for China 2008 (MEIC2008). updated was estimated by integrating priori knowledge of baseline emissions current observations based on Bayesian inference, which source-receptor sensitivities were calculated Decoupled Direct Method Three Dimensions Community Multiscale Air Quality Modeling System (CMAQ DDM-3D). An analytical solution theorem derived linear response assumption applied estimate actual emissions. comparable most recent MEIC 2016 2017, line decline trend last decade. adjustment improved accuracy predicting concentrations method.