We applied the aerosol optical depth (AOD) retrieved from the MODIS satellites and the tropospheric NO2 columns retrieved from the OMI satellite for studying the spatial and temporal distributions of air pollution in Henan Province. The results indicated that high PM2.5 and NO2 concentrations were mainly found in the central and the north areas of Henan province. The seasonal average concentrations of PM2.5 and NO2 were both found to be highest in winter and be lowest in summer. Particularly, the maximum PM2.5 and NO2 concentrations arrived 155.7μg/m3 and 2279.45 ×1013 mole/cm2 respectively in the winter of 2013, while the minimum PM2.5 and NO2 concentrations were as low as 49.17μg/m3 and 427.37×1013 mole/cm2 respectively in the summer of 2015. The annual average concentrations of ground-level PM2.5 and NO2 over Henan province increased from 2005 to 2011, and then decreased from 2011 to 2015. The annual average concentrations of ground-level PM2.5 and NO2 had been dropped to 65.7μg/m3 and 765.14×1013 mole/cm2 in the year of 2015.%利用MODIS气溶胶光学厚度(AOD)估算的近地面PM2.5质量浓度和OMI对流层NO2垂直柱浓度数据,统计分析了近11a(2005~2015年)河南省PM2.5质量浓度和NO2垂直柱浓度的空间分布、长时间序列变化和季节变化特征.研究发现:河南省中北部为PM2.5和NO2高值区,西部和南部山区为低值区.PM2.5和NO2最高值出现在冬季,其中2013年冬季达到峰值,分别为155.7μg/m3和2279.45×1013mole/cm2;最低值则通常出现在夏季,其中2015年夏季达到最低值,分别为49.17μg/m3和427.37×1013mole/cm2.2011年之后河南省年均PM2.5和NO2逐年下降,2015年达到2005年以来的最低值,分别为65.7μg/m3和765.14×1013mole/cm2.
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