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Cloud mask over snow-/ice-covered areas for the GCOM-C1/SGLI cryosphere mission: Validations over Greenland
- Source :
- Journal of Geophysical Research: Atmospheres. 119(21):12287-12300
- Publication Year :
- 2014
- Publisher :
- American Geophysical Union, 2014.
-
Abstract
- Cloud detection is a critically important first step required to derive many satellite data products. A novel cloud detection algorithm designed for the cryosphere mission of Global Climate Observation Mission First Climate satellite/Second Generation Global Imager (GCOM-C1/SGLI) is presented. This reflectance-based cloud detection scheme mainly utilizes only two short wavelength infrared channels with dynamic thresholds that depend on Sun-satellite viewing geometry to perform accurate cloud detection over snow/ice surfaces in high latitude as well as high-elevation regions. Profiles of atmospheric absorbing and scattering molecules as well as surface elevation are considered in the determination of the thresholds for the resulting snow/ice cloud mask (SCM) algorithm. Image-based tests and statistical results have been used to validate the performance of the SCM over the Greenland plateau. Statistics using collocated Cloud-Aerosol Lidar with Orthogonal Polarization and Moderate Resolution Imaging Spectroradiometer (MODIS) Aqua observations over Greenland in 2007 show that over snow/ice surfaces the performance of the SCM is generally better than that of the MODIS cloud mask.<br />資料番号: PA1510024000
- Subjects :
- Atmospheric Science
Ice cloud
Meteorology
Cloud top
Cloud fraction
Snow
Physics::Geophysics
Geophysics
Lidar
Space and Planetary Science
Earth and Planetary Sciences (miscellaneous)
Environmental science
Cryosphere
Satellite
Moderate-resolution imaging spectroradiometer
Astrophysics::Earth and Planetary Astrophysics
Physics::Atmospheric and Oceanic Physics
Remote sensing
Subjects
Details
- Language :
- English
- ISSN :
- 2169897X
- Volume :
- 119
- Issue :
- 21
- Database :
- OpenAIRE
- Journal :
- Journal of Geophysical Research: Atmospheres
- Accession number :
- edsair.doi.dedup.....9b65ca438694432e30836ea16a79bea1