Comparison of MISR and CERES top-of-atmosphere albedo

Details Comparison of MISR and CERES top-of-atmosphere albedo Comparison of MISR and CERES top-of-atmosphere albedo

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3323810s&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 23, CiteID L23810

Physics

2

Atmospheric Composition And Structure: Radiation: Transmission And Scattering, Global Change: Remote Sensing (1855), Global Change: Instruments And Techniques, Atmospheric Processes: Remote Sensing

Scientific paper

The Clouds and the Earth's Radiant Energy System (CERES) and the Multi-angle Imaging SpectroRadiometer (MISR) on Terra satellite measure the Earth's top-of-atmosphere (TOA) albedo in broadband and narrowband, respectively. This study presents the first direct comparison of the CERES and MISR albedos. An algorithm for converting the MISR spectral albedos to broadband is derived. The MISR and CERES albedos for overcast ocean scenes are compared between 75°S-75°N for solar zenith angles <=75°. For overcast 1° × 1° ocean regions, the relative differences and the relative root-mean-square (RMS) differences between the MISR and CERES albedos are ~0.8% and ~4.3%, respectively. Accounting for a ~2.0% error in the MISR albedos due to narrow-to-broadband albedo conversion errors, the RMS difference between the MISR and CERES albedos due to angular distribution model (ADM) differences is estimated to be ~3.8%. The remarkable consistency between the CERES and MISR albedos for overcast oceans suggests that both instrument teams have derived accurate corrections for the radiance anisotropy of cloud scenes. This consistency will strongly enhance the confidence in the temporal trends of cloud albedo measured by the CERES and have significant impact on climate studies.

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