环境一号卫星在监测大气PM10中的应用

摘要

选择京津唐地区作为实验区,从环境一号卫星(HJ-1)的CCD数据出发,利用暗目标法反演陆地气溶胶,然后在对气溶胶光学厚度进行垂直订正和湿度校正的基础上,得到PM<,10>的反演模型,进行PM<,10>的反演实验.并利用中国环境监测总站的地面监测数据对结果进行了检验.结果表明,HJ-1的时空分辨率满足PM<,10>周监测的需要,结果与地面数据有一定的相关性(相关系数为0.58),为提高PM<,10>的反演精度还需结合更多的地面数据进行模型的修正.%AOD (aerosol optical depth) over land surfaces was retrieved by DDV (dark dense vegetation) method, then based on the vertical and RH (relative humidity) correction, the model of PM10 retrieval was established. In order to validate the model, PM10 in the Beijing-Tianjin-Tangshan area was retrieved from May to August, 2009, and was compared against the ground-based measurements provided by China National Environmental Monitoring Centre. The results showed that, HJ-1 data can meet the requirement of weekly monitoring of PM10, and the correlation coefficient between the retrieved and measured PM10 was 0.58. However, the HJ-1 retrieved PM10 had a negative bias from the ground-based measurements, and further improvement would be conducted to improve the retrieving accuracy.