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Proceedings Paper

CO2 columnar amount retrieved from thermal infrared spectra observed by IMG/ADEOS
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Paper Abstract

Reducing temperature and water vapor estimation errors is indispensable for retrieving a CO2 concentration profile or columnar amount from thermal infrared spectrum data because spectral radiance in the thermal infrared region is much more sensitive to temperature and water vapor concentration changes than it is to CO2 concentration changes. This study presents a data analysis procedure to estimate the CO2 columnar amount from the thermal infrared spectrum. The first step retrieves the temperature vertical profile, water vapor vertical profile, and the surface temperature from spectra in the strong absorption bands of CO2 and H2O. Then the spectral biases that are attributable to temperature and water vapor retrieval errors are reduced by comparing observed and synthesized radiances in the atmospheric window region. The final step estimates the CO2 columnar amount from the corrected spectra of a weak absorption band of CO2 that is located around 940 cm-1. This method was applied to analysis of spectrum data from IMG sensor aboard the ADEOS satellite. Some preliminary results are shown.

Paper Details

Date Published: 20 January 2005
PDF: 8 pages
Proc. SPIE 5655, Multispectral and Hyperspectral Remote Sensing Instruments and Applications II, (20 January 2005); doi: 10.1117/12.578775
Show Author Affiliations
Ryoichi Imasu, Univ. of Tokyo (Japan)
Yoshifumi Ota, Univ. of Tokyo (Japan)


Published in SPIE Proceedings Vol. 5655:
Multispectral and Hyperspectral Remote Sensing Instruments and Applications II
Allen M. Larar; Makoto Suzuki; Qingxi Tong, Editor(s)

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