16 November 2010 Observation-based estimation of cloud-top height by geostationary satellite split-window measurements trained with CloudSat data
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Abstract
Look-up table for estimating the cloud-top height of upper-tropospheric clouds by the infrared brightness temperature (TB) at 10.8 μm (T11) and its difference from TB at 12 μm (ΔT11-12) measured by a geostationary satellite are presented. The look-up table was constructed by regressing the cloud radar measurements by the CloudSat satellite over the infrared measurements by the Japanese geostationary satellite MTSAT-1R. Standard deviations of measurements around the estimates were also displayed as an indicator of the ambiguity in the estimates, and were less than 1 km for the upper-tropospheric clouds with T11 < 240 K. The dependences of the estimates of cloud-top height at each point in T11-ΔT11-12 space on latitude, season, satellite zenith angle, day-night, and land-sea differences were examined. It was shown that these dependences were considered as being uniform in tropics, except for the region with large satellite zenith angle. The presented look-up tables can provide hourly estimates of cloud-top height at a specified location, and are fairly useful in comparing them with ground-based observations such as vertical profiles of humidity and/or wind.
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Atsushi Hamada, Noriyuki Nishi, "Observation-based estimation of cloud-top height by geostationary satellite split-window measurements trained with CloudSat data", Proc. SPIE 7856, Remote Sensing and Modeling of the Atmosphere, Oceans, and Interactions III, 78560D (16 November 2010); doi: 10.1117/12.869386; https://doi.org/10.1117/12.869386
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