Climate Dynamics

, Volume 43, Issue 7–8, pp 1857–1870

30-Year atmospheric temperature record derived by one-dimensional variational data assimilation of MSU/AMSU-A observations

Article

DOI: 10.1007/s00382-013-2012-5

Cite this article as:
Weng, F. & Zou, X. Clim Dyn (2014) 43: 1857. doi:10.1007/s00382-013-2012-5

Abstract

In the past, satellite observations of the microwave radiation emitted from the atmosphere have been directly utilized for deriving the climate tends of vertical-layer-averaged atmospheric temperatures. This study presents the 30-year atmospheric temperature trend derived by one-dimensional variational (1D-Var) data assimilation of Microwave Sounding Unit/Advanced Microwave Sounding Unit-A (MSU/AMSU-A) observations. Firstly, the radiance measurements from MSU on board the early National Oceanic and Atmospheric Administration (NOAA)-6 to NOAA-14 and AMSU-A on board NOAA-15 to -19 have been inter-calibrated to form a fundamental climate data record. A 1D-Var method is then employed to establish the thematic climate data record of atmospheric temperature profiles that are appropriate for climate change study. Verification of the MSU/AMSU-A derived temperature profiles with collocated Global Positioning System radio occultation data confirms a reasonable good accuracy of the derived atmospheric temperature profiles in the troposphere and low stratosphere. Finally, the global climate trend of the atmospheric temperature in clear-sky conditions is deduced, showing not only a global warming in the troposphere and a cooling in the stratosphere, but also a stronger warming in the upper troposphere than in the low troposphere.

Keywords

AMSU-A Data assimilation Climate trend 

Copyright information

© Springer-Verlag (outside the USA) 2013

Authors and Affiliations

  1. 1.NOAA Center for Satellite Applications and ResearchCollege ParkUSA
  2. 2.Department of Earth, Ocean and Atmospheric SciencesFlorida State UniversityTallahasseeUSA

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