[AAS11-P14] Comparisons of column-averaged dry-air mole fractions of greenhouse gases among GOSAT/TANSO-FTS SWIR, TIR, and NICAM-TM data
Keywords:GOSAT, XCO2, XCH4
We compared latitudinal distributions of XCO2 among TANSO-FTS TIR, SWIR, NICAM-TM, and a priori (NIES-TM05) data [Saeki et al., 2013]. TIR XCO2 data over the land in the Northern Hemisphere except the Sahara desert were slightly smaller than SWIR XCO2 data and, in contrast, slightly larger over the land in the Southern Hemisphere. Over the Sahara desert, TIR XCO2 data in the daytime were considerably smaller than SWIR and NICAM-TM XCO2 data, which suggests that surface parameters used in the TIR retrieval had some problems. Over Hawaii where there is no strong CO2 source, TIR XCO2 data agreed with SWIR XCO2 data to within 1% on average.