HR: 1340h
AN: A13D-1503    [Abstracts]
TI: Aerosol Effects on the Estimation of the Carbon Dioxide Concentration From the Measurements of Solar Absorption Spectra at an Altitude of 800 Meters by Using the FTS (GOSAT-BBM) in SWIR Region
AU: * Yoshida, Y
EM: yoshida.yukio@nies.go.jp
AF: National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, 305-8506, Japan
AU: Tanaka, T
EM: tanaka.tomoaki@nies.go.jp
AF: National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, 305-8506, Japan
AU: Saito, R
EM: saito.ryu@nies.go.jp
AF: National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, 305-8506, Japan
AU: Oguma, H
EM: oguma@nies.go.jp
AF: National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, 305-8506, Japan
AU: Morino, I
EM: morino@nies.go.jp
AF: National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, 305-8506, Japan
AU: Aoki, K
EM: kazuma@sci.u-toyama.ac.jp
AF: University of Toyama, 3190 Gofuku, Toyama, 930-8555, Japan
AU: Machida, T
EM: tmachida@nies.go.jp
AF: National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, 305-8506, Japan
AU: Yokota, T
EM: yoko@nies.go.jp
AF: National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, 305-8506, Japan
AB: The Greenhouse gases Observing SATellite (GOSAT) is scheduled to be launched in 2008 to observe tropospheric CO₂ and CH₄ from space. We developed a retrieval algorithm, which simultaneously estimates the CO₂ column concentration and the surface albedo from a spectrum of surface scattered solar radiation at 1.6 μm region measured by Thermal And Near infrared Sensor for carbon Observation - Fourier Transform Spectrometer (TANSO-FTS) aboard GOSAT. To validate and improve the retrieval algorithm, a field experiment was conducted from 1st to 18th December, 2006 using a bread board model (BBM) of the FTS. The surface scattered solar spectra were measured by BBM, which was installed at the terminal station of the cable car near the summit of Mt. Tsukuba (at an altitude of about 800 m). In-situ CO₂ censors (NDIR) and skyradiometers were set up at the surface target point and near the BBM for the continuous measurements. Also, CO₂ profile was observed in-situ by Cessna aircraft near the surface up to altitude of 3km. Data obtained with no cloud condition were analyzed. The CO₂ column concentrations (C_CO2) were retrieved with the assumption of with and without the boundary layer aerosol. Optical properties of aerosol were estimated from the skyradiometer measurements. The difference between the C_CO2 with and without aerosol had good correlation with the aerosol optical thickness at 1.6 μm, and -0.1 to 0.6 % change in the C_CO2 occurred due to aerosol. Most of the C_CO2 agreed with in-situ observation within 1.0 % but the maximum difference reached up to 3.0 %.
DE: 3360 Remote sensing
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting