%0 Journal Article
%T Comparison between MODIS and AIRS/AMSU satellite-derived surface skin temperatures
%A Y.-R. Lee
%A J.-M. Yoo
%A M.-J. Jeong
%A Y.-I. Won
%A T. Hearty
%A D.-B. Shin
%J Atmospheric Measurement Techniques (AMT) & Discussions (AMTD)
%D 2013
%I Copernicus Publications
%X Surface skin temperatures of the Level 3 products of MODIS Collection 5 (C5) and AIRS/AMSU version 5 (V5) have been compared in terms of monthly anomaly trends and climatologies over the globe during the period from September 2002 to August 2011. The MODIS temperatures in the 50¡ã N¨C50¡ã 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 sea surface temperature (SST) 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. Meanwhile, the MODIS ice surface temperature product (MYD29E1D) over the ocean is in better agreement with AIRS/AMSU temperatures, showing a root mean square error of 3.7¨C3.9 K. 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. Both MODIS and AIRS/AMSU show cooling rates from  0.05 ¡À 0.06 to  0.14 ¡À 0.07 K 9 yr 1 over the globe, but warming rates (0.02 ¡À 0.12 ¨C0.15 ¡À 0.19 K 9 yr 1) in the high latitude regions.
%U http://www.atmos-meas-tech.net/6/445/2013/amt-6-445-2013.html