Uncertainty in cloud optical thickness estimation by GMS-5 S-VISSR algorithm and its influence on the estimated radiative budget

[ABSTRACT] APEX (Asian Atmospheric Particle Environment Change Experiment) project aimed at performing simultaneous analysis of cloud, aerosol and atmospheric radiation by various observation methods(satellite, airplane, ground base) in East China sea. Comparison of the optical thickness from GMS-5 S-VISSR with those retrieved from Terra-MODIS shows some remarkable differences. Causes of such errors were investigated. One of them was a scientific problem deriving from the difference in cloud droplet effective radius. However this can not explain by itself all the error encountered in the estimation of the cloud optical thickness. The other cause of error checked was the quantization noise. And, this happens to be an engineering problem. In the error evaluation of the algorithm used, we realized that the quantization noise induced much of the optical thickness difference. Using the radiative transfer code "RSTAR5b" we examined the influence of this error in the estimation of the radiative budget.

https://opac.ll.chiba-u.jp/da/curator/104172/

https://opac.ll.chiba-u.jp/da/curator/104172/BA71319447-10-P051.pdf

Chiba University. Center for Environmental Remote Sensing

千葉大学環境リモートセンシング研究センター

会議発表用資料

BA71319447

Proceedings of the CEReS international symposium = CEReS国際シンポジウム資料集

10

51

57

2005-02-17

publisher

環境リモートセンシング研究センター「CEReSシンポジウム資料集」