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| Titel |
Simultaneous observations of Polar Mesosphere Summer Echoes at two different latitudes in Antarctica |
| VerfasserIn |
H. Nilsson, S. Kirkwood  , R. J. Morris, R. Latteck, A. R. Klekociuk, D. J. Murphy, M. Zecha, E. Belova |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 26, no. 12 ; Nr. 26, no. 12 (2008-11-27), S.3783-3792 |
| Datensatznummer |
250016309
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| Publikation (Nr.) |
 copernicus.org/angeo-26-3783-2008.pdf |
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| Zusammenfassung |
| Simultaneous observations of Polar Mesosphere Summer Echoes (PMSE) at Wasa
and Davis in Antarctica have been compared. Data with simultaneous
observations were obtained for 16 days between 18 January and 5 February
2007. Wasa is at a higher geographic latitude than Davis, but at lower
geomagnetic latitude. PMSE strength and occurrence frequency were
significantly higher at Wasa. The variation of daily PMSE occurrence over the
measurement period was in agreement with temperature and frost-point
estimates from the Microwave Limb Sounder on the Aura spacecraft for both
Wasa and Davis. The diurnal variation of PMSE strength and occurrence
frequency as well as the shape of the altitude profiles of average PMSE
strength and occurrence frequency were similar for the two sites. The deepest
part of the evening minimum in PMSE occurrence frequency occurred for the
same magnetic local time at the two sites rather than for the same local
solar time. The study indicates that PMSE strength and occurrence increase
between 68.6° and 73° geographic latitude, consistent with
observed differences in mesospheric temperatures and water vapor content. The
average altitude distribution of PMSE varies relatively little with latitude
in the same hemisphere. |
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