| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
We developed a method for the estimation of cloud-top height using only split-window channels of infrared observations from geostationary satellites. Lookup tables (LUTs) were constructed based on regression of them with direct observations of cloud top height from the Cloud-Aerosol Lidar and Cloud Profiling Radar onboard CALIPSO. Our previous estimation scheme using cloud radar underestimated the top heights of cirriform cloud. Using CALIOP data, we succeeded in reducing the underestimation of the height of cirriform clouds. Although CALIOP can detect optically thin clouds around the tropopause, their top heights cannot be estimated well using split-window observations. By defining the altitude at which the optical depth from the top had a specified value τmin (= 0.2) as the cloud-top height, we could create a practical LUT. We also extended our dataset to the mid-latitude and conducted the analysis of the tropical cirrus.
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