title: Enhanced mid-latitude tropospheric warming in satellite measurements.
abstract: The spatial distribution of tropospheric and stratospheric temperature trends for 1979 to 2005 was examined, based on radiances from satellite-borne microwave sounding units that were processed with state-of-the-art retrieval algorithms. We found that relative to the global-mean trends of the respective layers, both hemispheres have experienced enhanced tropospheric warming and stratospheric cooling in the 15 to 45 degrees latitude belt, which is a pattern indicative of a widening of the tropical circulation and a poleward shift of the tropospheric jet streams and their associated subtropical dry zones. This distinctive spatial pattern in the trends appears to be a robust feature of this 27-year record.
authors.affiliation: Department of Atmospheric Sciences, University of Washington, Seattle, WA 98195, USA. qfu@atmos.washington.edu
authors.forename: Qiang
authors.initials: Q
authors.lastname: Fu
authors.forename: Celeste M
authors.initials: CM
authors.lastname: Johanson
authors.forename: John M
authors.initials: JM
authors.lastname: Wallace
authors.forename: Thomas
authors.initials: T
authors.lastname: Reichler