Comparison between MODIS and AIRS/AMSU satellite-derived surface skin temperatures

Y. R. Lee, J. M. Yoo, M. J. Jeong, Y. I. Won, T. Hearty, D. B. Shin

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

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° 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 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 3.7-3.9 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±0.06 to -0.14±0.07 K 9 yr-1 over the globe, but warming rates (0.02±0.12 -0.15±0.19 K 9 yr-1) in the high latitude regions.

Original languageEnglish
Pages (from-to)445-455
Number of pages11
JournalAtmospheric Measurement Techniques
Volume6
Issue number2
DOIs
Publication statusPublished - 2013

All Science Journal Classification (ASJC) codes

  • Atmospheric Science

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