Detecting Aerosols over Land from Satellites by Measuring Far IR Radiation from the Earth-Atmospheric System  

作　　者：SHI Guang-Yu SUN Yuan-Long 

机构地区：[1]LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China [2]Graduate University of Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Atmospheric and Oceanic Science Letters》2010年第2期111-115,共5页大气和海洋科学快报（英文版）

基　　金：supported by the National Basic Research Program of China (Grant No. 2006CB403705)

摘　　要：In this study, a special method is proposed for detecting aerosols over land by analyzing satellitemeasured far IR radiation at three channels, 8.7, 11.5, and 12.5 lain. Sensitivity tests revealed that the behavioral features of radiative brightness temperatures （BTs） at these three channels with increasing optical depth are different among different types of aerosols. Analyzing how BTs and their differences, xBT （BT11.5-BT12.5） and YBT （BT8.7-BT11.5）, behave with varying optical depth can help to qualitatively distinguish among aerosols and semi-quantitatively estimate their optical thicknesses. In addition, the authors found that the vertical density profile of aerosols has little impact on this method.In this study,a special method is proposed for detecting aerosols over land by analyzing satellitemeasured far IR radiation at three channels,8.7,11.5,and 12.5 μm.Sensitivity tests revealed that the behavioral features of radiative brightness temperatures (BTs) at these three channels with increasing optical depth are different among different types of aerosols.Analyzing how BTs and their differences,x BT (BT 11.5 BT 12.5) and y BT (BT 8.7 BT 11.5),behave with varying optical depth can help to qualitatively distinguish among aerosols and semi-quantitatively estimate their optical thicknesses.In addition,the authors found that the vertical density profile of aerosols has little impact on this method.

关 键 词：aerosol remote-sensing over-land IR radia- tion brightness temperature satellite 

分 类 号：TN215[电子电信—物理电子学] X513[环境科学与工程—环境工程]