Validation of Observed and Computed Clear Sky OLR using CERES and AIRS

Details Validation of Observed and Computed Clear Sky OLR using CERES and AIRS Validation of Observed and Computed Clear Sky OLR using CERES and AIRS

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufm.a53f0334m&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #A53F-0334

Physics

3305 Climate Change And Variability (1616, 1635, 3309, 4215, 4513), 3309 Climatology (1616, 1620, 3305, 4215, 8408), 3360 Remote Sensing

Scientific paper

For almost 50 years now, accurate, long term records of solar insolation, planetary albedo, and OLR have been collected to monitor climate change. We focused on comparing two methods of determining clear sky OLR. Clear sky OLR computed using the AER Inc.'s radiative transfer model and retrievals from AIRS shows excellent agreement with co-located CERES clear sky OLR observations. Calculations at the Department of Energy's Atmospheric Radiation Measurement (ARM) Program site in the U.S. Southern Great Plains (SGP) between September 2002 and February 2005 with both in-situ measurements and retrievals from AIRS agree with CERES observations to ~1 W/m2 with an uncertainty in the mean of ~1 W/m2. The AIRS retrieval based RRTM calculation comparisons to CERES OLR is extended to global coverage for four days of coincident measurements. Results are given by surfaces defined by the International Geosphere-Biosphere Programme (IGBP). Excluding observed discrepancies in daytime and high latitude surfaces, the globally averaged bias is ~1 W/m2 with an uncertainty in the mean ~0.4 W/m2.

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