卫星遥感监测遵义市大气质量状况研究

Study on monitoring atmospheric quality of Zunyi City by satellite remote sensing

为了解遵义市大气质量空间分布状况,采用MODIS L1B 1 km遥感影像数据,基于6S大气辐射传输模型构建查找表,利用暗像元法反演了遵义市AOD(气溶胶光学厚度)分布,并将反演结果与NASA公布的MOD04_3K气溶胶产品及地面观测空气质量数据进行对比。结果表明:反演的遵义市AOD结果与NASA公布的MOD04_3K气溶胶产品相关性为0.73,与地面观测的AQI、PM2.5、PM 10相关性分别为0.70、0.70、0.61,反演结果与验证数据具有较好的一致性,AOD反演结果具有较高准确性;遵义市AOD分布呈现西南部较高,东北部较低的格局,遵义市全域AOD均值为0.23,红花岗区AOD均值最高(0.51),赤水市AOD值最低(0.12)。

In order to understand the spatial distribution of atmospheric quality in Zunyi City,MODIS L1B 1 km data was used to construct lookup tables based on 6S atmospheric radiation transmission model.Then dark pixel method was used to invert the distribution of aerosol optical depth(AOD)in Zunyi City,and the inversion results were compared with the MOD04_3K aerosol products and surface air quality data published by NASA.The results show that the AOD inversion results of Zunyi City have a correlation coefficient of 0.743 with MOD04_3K aerosol products published by NASA,and have correlation coefficients of 0.70,0.70 and 0.61 with AQI、PM2.5、and PM 10 observed on the ground,respectively.The inversion results have a good consistency with the verification data,so the accuracy of AOD inversion results is high.The distribution pattern of AOD in Zunyi City is high in the southwest and low in the northeast.The average AOD in Zunyi City is 0.23.The maximum average value is 0.51 which appears in Honghuagang District.The minimum average value is 0.12 which appears in Chishui City.