A use of 380nm channel of the GOSAT/CAI satellite imager to infer the aerosol loading over ocean and land areas

We developed a new aerosol remote sensing algorithm over both ocean and land area using 380 nm ultraviolet channel of Cloud and Aerosol Imager (CAI) on board the Ibuki (GOSAT: Greenhouse gases Observing SATellite) launched on January 23, 2009. The satellite carries the Fourier Transform Spectrometer (FTS) to retrieve the column CO2 and methane loading. The CAI is an accompanying imager for providing the information of cloud screening and also aerosol loading to correct the atmospheric path radiances involved in the greenhouse gas absorption spectral radiances. We will introduce in this talk a new aerosol retrieval algorithm of aerosol loading both over ocean and land by using its 380nm ultraviolet channel radiance. We will compare this result with the global aerosol optical thickness distribution obtained by a newly developed aerosol assimilation system for MODIS and AERONET data assimilated by the CCSR/NIES/FRCGC-MIROC+SPRINTARS general circulation model.