摘要
四川盆地为中国灰霾形势较为严重的区域之一,对四川盆地大气灰霾的监测具有十分重要的意义。利用环境一号卫星数据,对能表征大气污染程度的气溶胶光学厚度进行了反演。提出了用EVI植被指数判定暗像元精细化反演气溶胶光学厚度的方法,该方法能较好地去除部分大气影响,气溶胶光学厚度反演结果与CE318的气溶胶光学厚度结果相关性较高,误差较小,具有较高的精度,反演结果满足精细化要求。反演结果表明,四川盆地内有德阳、成都、眉山和乐山4个气溶胶光学厚度高值区,该高值区呈带状分布且与四川盆地的地形密切相关。
Sichuan Basin is one of the serious haze regions in China. It has great significance to monitor the atmospheric haze in Sichuan Basin. Based on the data of HJ - 1 satellite, this study inversed the Aerosol Optical Depth （ AOD）, which could represent the level of air pollution, proposed a method that used the EVI vegetation index to determine dark pixel to inverse AOD. This method can eliminate part of the atmospheric influence. The correlation between inversed AOD result and the result of CE318 is high, with small error and high precision. The inversion result can meet the requirement of refinement. The results showed that Sichuan Basin has four high AOD regions which are Deyang, Chengdu, Meishan and Leshan. These regions are zonal distributed and closely related to the topography of Sichuan Basin.
出处
《四川环境》
2014年第4期29-35,共7页
Sichuan Environment
基金
四川省环境保护科学研究院四川气溶胶多源遥感反演与时空分析项目(2013HBZX03)
关键词
四川盆地
环境卫星
光学厚度
精细化反演
Sichuan basin
HJ satellite
aerosol optical depth （AOD）
refined inversion
