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| Titel |
Stratospheric warming in Southern Hemisphere high latitudes since 1979 |
| VerfasserIn |
Y. Hu, Q. Fu |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 9, no. 13 ; Nr. 9, no. 13 (2009-07-03), S.4329-4340 |
| Datensatznummer |
250007488
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| Publikation (Nr.) |
 copernicus.org/acp-9-4329-2009.pdf |
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| Zusammenfassung |
| 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 7–8°C
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. |
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