无锡市MODIS气溶胶光学厚度与PM_(2.5)质量浓度的相关性分析

Relationship Analysis of Aerosol Optical Depth with MODIS Data and PM_(2.5) Mass Concentration over Wuxi

将MODIS数据反演得出的气溶胶光学厚度与无锡市区实测得到的PM2.5质量浓度进行相关性分析,结果两者的直接相关性较低,相关系数为0.283 4。气溶胶光学厚度经垂直分布和湿度修正后,两者相关性显著提高,相关系数为0.565 9。虽然修正过程存在误差,相关性未达预期程度,但该方法得到的气溶胶光学厚度可作为PM2.5监测的有效补充。

Based on MODIS aerosol optical depth(AOD)and PM2.5 mass concentration calculated from the measured data in Wuxi,the direct correlation between AOD and PM2.5 mass concentration was found relatively low,the correlation coefficient is 0.283 4.The correlation significantly improved after taking aerosol vertical dis-tribution and influence of relative humidity into consideration,the correlation coefficient is 0.565 9.The analysis verifies that the MODIS AOD is an effective means for monitoring PM2.5 mass concentration.