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Gravity wave activities in the MLT observed by a meteor radar at King Sejong Station (62˚S, 57˚W), Antarctica

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Title
Gravity wave activities in the MLT observed by a meteor radar at King Sejong Station (62˚S, 57˚W), Antarctica
Other Titles
남극 세종과학기지 유성레이더에서 관측된 중간권 중량파 연구
Authors
Kim, Jeong-Han
Jee, Geonhwa
Kim, Yong Ha
Lee, Changsup
Keywords
Gravity wave; MLT; Meteor radar
Issue Date
2010
Citation
Kim, Jeong-Han, et al. 2010. Gravity wave activities in the MLT observed by a meteor radar at King Sejong Station (62˚S, 57˚W), Antarctica. 한국우주과학회. 한국우주과학회. 2010.10.28~.
Abstract
We have analyzed horizontal wind data from a meteor radar at King Sejong Station, Antarctica to measure wind variances near the mesopause region. The horizontal wind variance within short time scales (up to 3 h), which was determined from individual meteor echoes, can be used to estimate gravity wave activity. As a measure for the gravity wave activity, we utilize wind variance derived by the least square method after subtraction of large scale variances due to both tidal variation and wind shear at each height interval. We present vertical profiles of monthly mean wind variances to characterize gravity wave activities over seasons. Gravity wave activities show seasonal behaviors with a semi-annual variation and height dependences. The gravity wave activity in the Antarctic region is believed to have a deep connection with zonal winds and the Antarctic vortex in lower atmosphere. By comparing our results with those from the Rothera station, we will discuss the relation of gravity wave activities between the mesosphere and lower atmosphere.
URI
http://repository.kopri.re.kr/handle/201206/8022
Conference Name
한국우주과학회
Conference Place
한국우주과학회
Conference Date
2010.10.28~
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