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Location: Home > Announcements

[Seminar on Jan 30] Ice cloud properties from Himawari-8/AHI geostationary satellite measurement: Estimation of the shortwave radiative flux

Husi Letu

Institute of Remote Sensing, IAP

Room 303, Keyan Building

15:00, Jan 30, 2018

 

Himawari-8 is a new-generational geostationary meteorological satellite, which is successfully launched by the Japan Meteorological Agency (JMA) on 7 October 2014. The Himawari-8 carries a multi-spectral sensor of Advanced Himawari Imager (AHI). The AHI has 16 observational bands from visible to thermal infrared spectral regions with nadir spatial resolutions of 500 m (one band), 1000-m (two bands) and 2000 m (13 bands). Performance of the spatial and spectral resolution of the AHI is close to the low orbit satellite e. g. MODIS instrument in the nadir observations.

Ice cloud property products from satellite measurements are widely applied in monitoring climate change, numerical weather prediction and meteorological disasters. In this study, optical and microphysical properties of the ice cloud are retrieved from Himawari-8 satellite measurements. Fractal ice partial scattering model called “Voronoi” is applied in the “Comprehensive Program for Cloud Optical Measurement” (CAPCOM) algorithmto retrieve the ice cloud properties from AHI measurements. Ice cloud properties from AHI measurement are compared to MODIS collections-6 ice cloud products for characterizing the retrieval accuracy of the Voronoi model. Furthermore, shortwave radiative flux (SRF) in ground surface is estimated from retrieval results of the cloud properties by using Rstar radiative transfer model. Finally, the SRF is validated by using ground surface in-situ observation data in East Asia.

 
 
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