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- W2382632004 abstract "MM5 (Fifth-Generation NCAR/Penn State Mesoscale Model)-Models-3/CMAQ (Community Multi-Scale Air Quality) air quality modeling system was applied to simulate the air quality over the Beijing-Tianjin-Hebei area. The Brute Force and DDM-3D (Decoupled Direct Method in 3 Dimensions) method were used to estimate the regional contributions to PM2.5 in Shijiazhuang and Beijing, respectively. The results indicate that there is a high correlation between the two methods, with the correlation coefficients ranging between 0.950 to 0.989. Second, the results of the two methods are quite close when the contribution from one region is relatively low. Along with the increase of the concentration contributions, the results of Brute Force method are increasingly higher than those of DDM-3D; the slope of the linear fitting is between 1.14 to 2.05. For example, Brute Force method estimates emissions from southern Hebei area contribute around 54.7% of the PM2.5 in the Shijiazhuang city, while DDM-3D method estimates around 64.4%. Moreover, Brute Force method indicates a larger impacting area, and it brings discrete negative points and some of these points are close to large positive numbers, indicating numerical errors in the model calculation. In comparison, the DDM-3D results are more reasonable." @default.
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- W2382632004 date "2013-01-01" @default.
- W2382632004 modified "2023-09-27" @default.
- W2382632004 title "Application of CMAQ-DDM-3D in the source analysis of fine particulate matter (PM_(2.5))" @default.
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