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| Titel |
Mesospheric Temperatures and Winds measured by a VHF Meteor Radar at King Sejong Station (62.2S, 58.8W), Antarctica |
| VerfasserIn |
Yongha Kim, Jeong-Han Kim, Geonwha Jee, Chang-Sup Lee |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250038737
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| Zusammenfassung |
| A VHF radar at King Sejong Station, Antarctica has been measuring meteor echoes since
March 2007. Temperatures near the mesopause are derived from meteor decay times with an
improved method of selecting meteor echo samples, and compared with airglow temperatures
simultaneously observed by a spectral airglow temperature imager (SATI). The temperatures
derived from meteor decay times are mostly consistent with the rotational temperatures of
SATI OH(6-2) and O2(0-1) emissions from March through October. During southern summer
when SATI cannot be operated due to brief night time, the meteor radar observation shows
cold mesospheric temperatures, significantly lower than the CIRA86 model. The meteor radar
observation also provides wind field information between 80 and 100 km of altitude. The
measured meridional winds seem to follow the summer pole to winter pole circulation,
and thus are correlated with the measured seasonal temperature change. However,
the correlation between meridional winds and temperatures is not found in day
by day base, as a previous study reported. Tidal characteristics of both zonal and
meridional winds will also be compared with those of other Antarctic stations. |
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