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Effects of ozone cooling in the tropical lower stratosphere and upper troposphere

Forster, PM, Bodeker, G, Schofield, R, Solomon, S and Thompson, D (2007) Effects of ozone cooling in the tropical lower stratosphere and upper troposphere. Geophysical Research Letters, 34 (23). ISSN 0094-8276

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Abstract

In this paper, we examine the tropical lower stratosphere and upper troposphere and elucidate the key role of ozone changes in driving temperature trends in this region. We use a radiative fixed dynamical heating model to show that the effects of tropical ozone decreases at 70 hPa and lower pressures can lead to significant cooling not only at stratospheric levels, but also in the ''sub-stratosphere/ upper tropospheric'' region around 150-70 hPa. The impact of stratospheric ozone depletion on upper tropospheric temperatures stems from reduced longwave emission from above. The results provide a possible explanation for the long-standing discrepancy between modeled and measured temperature trends in the uppermost tropical troposphere and can explain the latitudinal near-homogeneity of recent stratospheric temperature trends.

Item Type: Article
Copyright, Publisher and Additional Information: © 2007 American Geophysical Union. Reproduced in accordance with the publisher's self-archiving policy.
Keywords: temperature trends, atmospheric-temperature, tropopause height, radiosonde data, variability, models, ozonesondes, reanalyses, profiles, behavior
Institution: The University of Leeds
Academic Units: The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds)
Depositing User: Symplectic Publications
Date Deposited: 13 Oct 2011 10:52
Last Modified: 10 Jun 2014 07:21
Published Version: http://dx.doi.org/10.1029/2007GL031994
Status: Published
Publisher: American Geophysical Union
Identification Number: 10.1029/2007GL031994
URI: http://eprints.whiterose.ac.uk/id/eprint/43314

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