HR: 1340h
AN: A13D-1504    [Abstracts]
TI: Investigation of Clear-sky and Small Albedo Region From CALIOP and MODIS Observations - Optimal Region for Retrieving Carbon Dioxide From GOSAT TANSO-FTS Observation -
AU: Yokota, T
EM: yoko@nies.go.jp
AF: National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, 305-8506, Japan
AU: * Eguchi, N
EM: eguchi.nawo@nies.go.jp
AF: National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, 305-8506, Japan
AU: Yoshida, Y
EM: yoshida.yukio@nies.go.jp
AF: National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, 305-8506, Japan
AB: The TANSO-FTS (Thermal And Near infrared Sensor for carbon Observation-Fourier Transform Spectrometer) is anticipated to be onboard the GOSAT (Greenhouse gases Observing SATellite), which will be launched in 2008, and obtain the spectrum of surface-scattered light for the retrieval of CO₂ and CH₄ column density. One of its main aims is to deliver the CO₂ column density with the error less than 1% from 1.6 μ m band. This study investigates the global distribution of the optimal environment for CO₂ retrieval (i.e. the region with no cloud cover and the albedo less than 0.5) based on the cloud profile data derived from the CALIOP (Cloud-Aerosol LIdar with Orthogonal Polarization) and the surface land reflectance at 1.6 μ m from the MODIS (MODerate resolution Imaging Spectrometer) from June 2006 to June 2007. The clear sky ratio from the CALIOP is the ratio of the total number of data detecting the ground as well as no cloud layer to that of all data along 10 km track, because the instantaneous field of view of TANSO-FTS is approximately 10 km. The optimal environment over the land was found to exist around the desert regions, such as northwest Arabian Peninsula, Southern Africa and the West coast of the United States throughout the year, and the continents in the middle latitudes on the winter hemisphere. The optimal environment covered about 13 % of the whole globe on annual average.
DE: 3309 Climatology (1616, 1620, 3305, 4215, 8408)
DE: 3311 Clouds and aerosols
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting