Numerical simulations for the sources apportionment and control strategies of PM over Pearl River Delta, China, part I: Inventory and PM sources apportionment.

This article uses the WRF-CMAQ model to systematically study the source apportionment of PM under typical meteorological conditions in the dry season (November 2010) in the Pearl River Delta (PRD). According to the geographical location and the relative magnitude of pollutant emission, Guangdong Province is divided into eight subdomains for source apportionment study. The Brute-Force Method (BFM) method was implemented to simulate the contribution from different regions to the PM pollution in the PRD.

Numerical simulations for the sources apportionment and control strategies of PM over Pearl River Delta, China, part II: Vertical distribution and emission reduction strategies.

The contribution of various emission sources to the vertical structure of the PM concentration and the modeling of emission reduction strategies are emphasized in this study. Analysis of vertical distribution of PM concentration in the planetary boundary layer (PBL) reveals that strong diurnal cycle exists during the pollution episodes, with heavier surface pollution in nocturnal periods. Contributions from transportation and agriculture are mainly restricted to the surface, while contributions from industry and power are distributed in a relatively higher layer.