Title Stratospheric warming in Southern Hemisphere high latitudes since 1979
Author Hu, Y.; Fu, Q.
Author Affil Hu, Y., Peking University, Department of Atmospheric Sciences, Beijing, China. Other: University of Washington
Source Atmospheric Chemistry and Physics, 9(13), p.4329-4340, . Publisher: Copernicus, Katlenburg-Lindau, International. ISSN: 1680- 7316
Publication Date 2009
Notes In English. Published in Atmospheric Chemistry and Physics Discussions: 16 January 2009, http://www.atmos-chem-phys- discuss.net/9/1703/2009/acpd-9-1703-2009.html ; accessed in Apr., 2011. 40 refs. Ant. Acc. No: 91577. GeoRef Acc. No: 310520
Index Terms absorption; global change; global warming; human activity; remote sensing; simulation; environment simulation; solar radiation; statistical analysis; stratosphere; temperature; Antarctica; Southern Hemisphere; boreal environment; climate forcing; correlation coefficient; general circulation models; greenhouse gases; Rossby waves; satellite methods; sea-surface temperature; seasonal variations; solar forcing; terrestrial environment; time series analysis; troposphere
Abstract In the present study, we show evidence of significant stratospheric warming over Southern Hemisphere high latitudes and large portions of the Antarctic polar region in winter and spring seasons, with a maximum warming of 7-8C in September and October, using satellite Microwave Sounding Unit observations for 1979-2006. It is found that this warming is associated with increasing wave activity from the troposphere into the stratosphere, suggesting that the warming is caused by enhanced wave-driven adiabatic heating. We show that the stratospheric warming in Southern Hemisphere high latitudes has close correlations with sea surface temperature (SST) increases, and that general circulation model simulations forced with observed time-varying SSTs reproduce similar warming trend patterns in the Antarctic stratosphere. The simulated stratospheric warming is closely related to increasing wave activity in the Southern Hemisphere. These findings suggest that the stratospheric warming is likely induced by SST warming. As SST warming continues as a consequence of greenhouse gas increases due to anthropogenic activity, the stratospheric warming would also continue, which has important implications to the recovery of the Antarctic ozone hole.
URL http://www.atmos-chem-phys.net/9/4329/2009/acp-9-4329-2009.pdf
Publication Type journal article
Record ID 65007081