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Meteor echo height ceiling effect and mesospheric temperature estimation from meteor radar observations

Cited 1 time in wos
Cited 1 time in scopus
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Title
Meteor echo height ceiling effect and mesospheric temperature estimation from meteor radar observations
Other Titles
유성 에코 고도 분포의 천정 효과와 중간권 온도 추정
Authors
Lee, Changsup
Jee, Geonhwa
Kim, Jeong-Han
Song, In-Sun
Subject
Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences
Issue Date
2018-09
Citation
Lee, Changsup, et al. 2018. "Meteor echo height ceiling effect and mesospheric temperature estimation from meteor radar observations". ANNALES GEOPHYSICAE, 36(5): 1267-1274.
Abstract
The mesospheric temperature estimation from meteor height distribution is reevaluated by using the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) and the King Sejong Station meteor radar observations. It is found that the experimentally determined proportionality constant between the full width at half maximum (FWHM) of the meteor height distribution and temperature is in remarkable agreement with theoretical value derived from the physics-based equation and it is nearly time-invariant for the entire observation period of 2012?2016. Furthermore, we newly found that the FWHM provides the best estimate of temperature at slightly lower height than the meteor peak height (MPH) by about 2?3km. This is related to the asymmetric distribution of meteor echoes around MPH, which is known to be caused by the meteor echo height ceiling effect (MHC). At higher altitude above MPH, the meteor detection rate is greatly reduced due to the MHC and the cutoff height for this reduction follows a fixed molecular mean free path of the background atmosphere. This result indicates that the meteor height distribution can be used to estimate the mesospheric temperature even under the asymmetric meteor echo distribution caused by the MHC at high altitude.
URI
https://repository.kopri.re.kr/handle/201206/10524
DOI
http://dx.doi.org/10.5194/angeo-36-1267-2018
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