5:15 PM - 6:30 PM
[ACG10-P05] Climatological Cloud Database Estimated by Geostationary Satellite Split-Window Measurements
Keywords:geostationary satellite, cloud, database
We also tried to extend the targeted region to the mid-latitude. In our present scheme applicable for only tropics, the vertical profile of temperature is assumed to be almost constant in whole tropics and all the year. However, since the temperature variability is much larger in mid latitude, it is not plausible to assume that the same IR radiance comes from the clouds with a certain top height. Therefore, we proposed a new method to use temperature data of the global analysis together. The temperature of the cloud top is estimated through the altitude of the cloud top observed by CloudSat as well as the temperature profile deduced from the global analysis data. Then we constructed LUT of cloud top temperature (not height) by the regression of the MTSAT IR radiance with respect to cloud top temperature. We can get the cloud top height at any point at any time by converting the cloud top temperature to cloud top height, with using global analysis data. A preliminary estimate using this method indicated that the cloud top height is estimated within allowable error even in the mid latitude.