| dc.description.abstract | The radiometric effect of atmospheric aerosols is an important factor on earth radiation budget which related to the issues of global warming and climate change. Heavy loading of particulate matter (PM2.5) also has significant impact on human health, especially in the layer near surface. Currently, the ground-based measurement is primarily employed for the PM2.5 monitor, but the stationed location cannot meet the request in spatial distribution. Thus the satellite provides the total column aerosol information over wide region is usually applied, and consider the aerosol vertical distribution, to obtain near surface of PM2.5 concentration. In addition, the radiation characteristics of different aerosol types are significantly different, which is an important factor for the calculation of PM2.5 concentration. Therefore, this paper will apply the fitting result of the previous vertical distribution of aerosol, extract near-surface aerosol extinction coefficient, combined with the identification of aerosol type, based on establishment of the relationship between aerosol optical depth (AOD) and particulate matter (PM2.5), to improve accuracy of satellite retrieved near surface PM2.5. To provide detailed information in temporal and spatial of quality.
This study intends to establish the relationship between AOD and PM concentration based on grounds station in the region of Inner Mongolia, Taipei and Chiang Mai for sampling dust (DS), anthropogenic pollutants (AP) and biomass burning (BB) aerosols respectively. It can be seen from the results that the correlation coefficients between AOD and PM based on the ground-based measurements are 0.625, 0.754 and 0.884 for DS, AP and BB respectively. The results of relationship are further applied to MODIS AOD products in Taiwan. The root mean square error (RMSE) is 9.685??/?3 after compared with ground measurements, indicating highly feasibility of proposed approach for PM concentration monitor from satellite remote sensing. | en_US |