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 ...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.展开更多
基金中国科学院科学先导专项(XDA17010301,XDA17040505,XDA15052500,XDA15350201),中国科学院国家空间科学中心培育专项135项目(Y92111BA8S)国家自然科学基金项目(41874175,41931073,41574159)+2 种基金云南省基础研究青年项目(2019FD111)ISSI-Beijing项目Relativistic Electron Precipitation and its Atmospheric Effects国家重点实验室专项基金项目共同资助。
基金supported by the National Basic Research Program of China (Grant No. 2006CB403705)
文摘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.
