| Popis: |
In this study, we try to find the possible emission source area of the grey haze through comparing the ground observation station weather data and remote sensing data for the grey haze process that Beijing-Tianjin-Hebei region experienced in November the 8-14, 2013 in which the degree of contamination range from severe to mild to severe. The result demonstrates that before the invasion of the cold air , the coverage of the grey haze reach its maximum where south central areas of Beijing-Tianjin-Hebei is more severer compared with the south central and peri-urban areas of Hebei province. For the greater intensity grey haze companied by the wind convergence in the surface boundary layer, the result of the MODIS satellite monitoring is consistent with the meteorological station observation. Whereas MODIS satellite monitoring method could make up the shortfall of the meteorological station for the mild grey haze in certain degree. After the cold air, haze primary development area is very obvious, and the starting position of haze in the role of diffusion by the wind is also here, based on this can lock the grey haze emission source area and make concrete origination by using the high resolution satellite. The precise positioning could provide the scientific basis for the pertinent management on pollution control for the local government and relevant authority. |
