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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union

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https://doi.org/10.5194/amt-2018-122
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
12 Jun 2018
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Measurement Techniques (AMT).
A high-level cloud detection method utilizing the GOSAT TANSO–FTS water vapor saturated band
Nawo Eguchi1 and Yukio Yoshida2 1Research Institute for Applied Mechanics (RIAM), Kyushu University, Kasuga Park 6-1, Kasuga, Fukuoka, Japan
2Center for Global Environmental Research (CGER), National Institute for Environmental Studies (NIES), Onogawa 16-2, Tsukuba, Ibaraki, Japan
Abstract. A detection method for high-level cloud, such as ice clouds, is developed using the water vapor saturated channels of the solar reflected spectrum observed by the Greenhouse gases Observing SATellite (GOSAT) Thermal And Near-infrared Sensor for carbon Observation Fourier Transform Spectrometer (TANSO–FTS). The clouds detected by this method are relatively optically thin (0.01 or less) and located at high altitude. Approximately 85 % of the results from this method for clouds with cloud-top altitude above 5 km agree with Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) cloud classification. GOSAT has been observing since April 2009 with a 3-day cycle, providing a spectral data record that exceeds 8 years. Cloud information derived from GOSAT TANSO-FTS spectra could be powerful data for understanding the variability in cirrus cloud on temporal scales from synoptic to interannual.
Citation: Eguchi, N. and Yoshida, Y.: A high-level cloud detection method utilizing the GOSAT TANSO–FTS water vapor saturated band, Atmos. Meas. Tech. Discuss., https://doi.org/10.5194/amt-2018-122, in review, 2018.
Nawo Eguchi and Yukio Yoshida
Nawo Eguchi and Yukio Yoshida
Nawo Eguchi and Yukio Yoshida

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Short summary
A detection method for high-level cloud, such as ice clouds, is developed using the water vapor saturated channels (2 μm) of the solar reflected spectrum observed by the TANSO-FTS on board GOSAT. The clouds detected by this method are relatively optically thin (0.01 or less) and located at high altitude. Approximately 85 % of the results from this method for clouds with cloud-top altitude above 5 km agree with Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) cloud classification.
A detection method for high-level cloud, such as ice clouds, is developed using the water vapor...
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