Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 7-Day Trial for You or Your Team.

Learn More →

Effect of zonal asymmetries in stratospheric ozone on simulated Southern Hemisphere climate trends

Effect of zonal asymmetries in stratospheric ozone on simulated Southern Hemisphere climate trends Stratospheric ozone is represented in most climate models by prescribing zonal‐mean fields. We examine the impact of this on Southern Hemisphere (SH) trends using a chemistry climate model (CCM): multi‐decadal simulations with interactive stratospheric chemistry are compared with parallel simulations using the same model in which the zonal‐mean ozone is prescribed. Prescribing zonal‐mean ozone results in a warmer Antarctic stratosphere when there is a large ozone hole, with much smaller differences at other times. As a consequence, Antarctic temperature trends for 1960 to 2000 and 2000 to 2050 in the CCM are underestimated when zonal‐mean ozone is prescribed. The impacts of stratospheric changes on the tropospheric circulation (i.e., summertime trends in the SH annular mode) are also underestimated. This shows that SH trends related to ozone depletion and recovery are underestimated when interactions between stratospheric ozone and climate are approximated by an imposed zonal‐mean ozone field. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Geophysical Research Letters Wiley

Effect of zonal asymmetries in stratospheric ozone on simulated Southern Hemisphere climate trends

Loading next page...
 
/lp/wiley/effect-of-zonal-asymmetries-in-stratospheric-ozone-on-simulated-PieuX0Nw0A

References (24)

Publisher
Wiley
Copyright
Copyright © 2009 by the American Geophysical Union.
ISSN
0094-8276
eISSN
1944-8007
DOI
10.1029/2009GL040419
Publisher site
See Article on Publisher Site

Abstract

Stratospheric ozone is represented in most climate models by prescribing zonal‐mean fields. We examine the impact of this on Southern Hemisphere (SH) trends using a chemistry climate model (CCM): multi‐decadal simulations with interactive stratospheric chemistry are compared with parallel simulations using the same model in which the zonal‐mean ozone is prescribed. Prescribing zonal‐mean ozone results in a warmer Antarctic stratosphere when there is a large ozone hole, with much smaller differences at other times. As a consequence, Antarctic temperature trends for 1960 to 2000 and 2000 to 2050 in the CCM are underestimated when zonal‐mean ozone is prescribed. The impacts of stratospheric changes on the tropospheric circulation (i.e., summertime trends in the SH annular mode) are also underestimated. This shows that SH trends related to ozone depletion and recovery are underestimated when interactions between stratospheric ozone and climate are approximated by an imposed zonal‐mean ozone field.

Journal

Geophysical Research LettersWiley

Published: Sep 1, 2009

There are no references for this article.