Multi-model simulation of PM10 during the2008 Beijing Olympic Games:Effectiveness of emission restrictions
多模式模拟评估奥运赛事期间可吸入颗粒物减排效果

The cause of the decrease of respirable suspended particulate matter (PM10) concentrations over Beijing during the Olympics 2008, is examined using the multi-models air quality system consisting of the Nested Air Quality Prediction Modeling System (NAQPMS),the US/EPA Community Multiscale Air Quality (CMAQ) modeling system and the three dimensional Comprehensive Air Quality Model with extensions (CAMx). The multi-models simulations are processed with same meteorological field and same emissions inventory provided respectively by the fifth-generation NCAR/Penn State Mesoscale Model (MM5) and the Sparse Matrix Operator Kernel Emissions (SMOKE). Comparing predicted ensemble PM10 concentrations over Beijing under the meteorological conditions in August in 2006 and 2008, it indicates that PM10 concentrations decrease during the Olympic Games is mainly triggered by emissions reduction due to additional strengthened control measures. The multi-models simulations performed under reduced emissions condition show that all implemented measures during the Olympic Games correspond to a reduction of PM10 loading of about 200 tons per day under the meteorological conditions in August 2008. This corresponds to about 50% reduction of PM10 emissions in Beijing.