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| Titel |
The role of the QBO in the inter-hemispheric coupling of summer mesospheric temperatures |
| VerfasserIn |
P. J. Espy, S. Ochoa Fernández, P. Forkman, D. Murtagh, J. Stegman |
| 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 ; 11, no. 2 ; Nr. 11, no. 2 (2011-01-17), S.495-502 |
| Datensatznummer |
250009179
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| Publikation (Nr.) |
 copernicus.org/acp-11-495-2011.pdf |
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| Zusammenfassung |
| Inter-hemispheric coupling between the polar summer mesosphere and
planetary-wave activity in the extra-tropical winter stratosphere has
recently been inferred using Polar Mesospheric Cloud (PMC) properties as a
proxy for mesospheric temperature (Karlsson et al., 2007). Here we confirm
these results using a ten-year time series of July mesospheric temperatures
near 60° N derived from the hydroxyl (OH) nightglow. In addition, we
show that the time-lagged correlation between these summer mesospheric
temperatures and the ECMWF winter stratospheric temperatures displays a
strong Quasi-Biennial Oscillation (QBO). The sign and phase of the
correlation is consistent with the QBO modulation of the extra-tropical
stratospheric dynamics in the Southern Hemisphere via the Holton-Tan
mechanism (Holton and Tan, 1980). This lends strength to the identification
of synoptic and planetary waves as the driver of the inter-hemispheric
coupling, and results in a strong QBO modulation of the polar summer
mesospheric temperatures. |
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