Comparison between MODIS and AIRS/AMSU satellite-derived surface skin temperatures
Author:
Lee Y.-R.,Yoo J.-M.,Jeong M.-J.,Won Y.-I.,Hearty T.,Shin D.-B.
Abstract
Abstract. Surface skin temperatures of the Version 5 Level 3 products of MODIS and AIRS/AMSU have been compared in terms of monthly anomaly trends and climatology over the globe during the period from September 2002 to August 2011. The MODIS temperatures in the 50° N–50° S region tend to systematically be ~1.7 K colder over land and ~0.5 K warmer over ocean than the AIRS/AMSU temperatures. Over high latitude ocean the MODIS values are ~5.5 K warmer than the AIRS/AMSU. The discrepancies between the annual averages of the two sensors are as much as ~12 K in the sea ice regions. Both MODIS and AIRS/AMSU show cooling trends from −0.05 ± 0.06 to −0.14 ± 0.07 K (9 yr)−1 over the globe, but warming trends (0.02 ± 0.12–0.15 ± 0.19 K (9 yr)−1) in the high latitude regions. The disagreement between the two sensors results mainly from the differences in ice/snow emissivity between MODIS infrared and AMSU microwave, and also in their observational local times.
Publisher
Copernicus GmbH
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