卫星多光谱观测在京津地区雾霾识别中的应用

Application of Satellite Multispectral Observation to Haze Identification in Beijing and Tianjin

随着社会的发展,雾霾对人们的生活和健康造成的影响日益增大,我们迫切地需要对污染区域进行改善,而如何识别雾霾就变得尤为重要。选取北京和天津为研究区域,比较了同一区域在雾霾天和非雾霾天的地物光谱反射率值的变化,并将得到的光谱反射率值代入推导出的修正归一化差异霾指数(Modify the Normalized Differential Haze Index,M-NDHI)公式中,从而利用得到的修正归一化差异霾指数计算出一个能有效识别雾霾区域的新的雾霾指标。该方法能够大大减轻在无云条件下雾霾识别的工作强度,从而达到提高识别效率的目的。

With the development of society,haze has an increasing impact on people's life and health.It is urgent for us to improve the polluted areas,and how to identify haze has become particularly important.In this paper,Beijing and Tianjin were selected as the study area,and the changes of spectral reflectance values of ground objects in the same area were compared during haze and sunny days,and the obtained spectral reflectance values were substituted into the M-NDHI formula,so as to calculate a new haze index that could effectively identify the haze area by using the modified normalized differential haze index obtained.This method could greatly reduce the work intensity of haze identification under the cloudless condition,so as to achieve the purpose of improving the identification efficiency.