Seasonal variation of meteor decay times observed at King Sejong Station (62.22°S, 58.78°W), Antarctica
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- Seasonal variation of meteor decay times observed at King Sejong Station (62.22°S, 58.78°W), Antarctica
- Other Titles
- 남극 세종과학기지에서 관측된 유성흔 소멸시간의 계절적 변화
- Kim, Yong Ha
- Geochemistry & Geophysics; Meteorology & Atmospheric Sciences
- Mesosphere; Mesospheric temperature; Meteor radar; Meteor trail decay time
- Issue Date
- Kim, Yong Ha, et al. 2010. "Seasonal variation of meteor decay times observed at King Sejong Station (62.22°S, 58.78°W), Antarctica". Journal of Atmospheric and Solar-Terrestrial Physics, 72(11-12): 883-889.
- We analyzed meteor decay times measured by a VHF radar at King Sejong Station by classifying strong and weak meteors according to their estimated electron line densities. The height profiles of monthly averaged decay times show a peak whose altitude varies with season at altitudes of 80~85 km. The higher peak during summer is consistent with colder temperatures that cause faster chemical reactions of electron removal. By adopting temperature dependent empirical recombination rates from rocket experiments and meteor electron densities of 2x10^5 ~ 2x10^6 cm^3 in a decay time model, we are able to account for decreasing decay times below the peak for all seasons without invoking meteor electron removal by hypothetical icy particles.
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