12:00 〜 12:15
[PEM13-24] Long-term meteor wind observations as by-products of routine mesosphere measurements of PANSY radar, Antarctica
キーワード：南極、PANSYレーダー、流星風観測、昭和基地
PANSY radar at Syowa station (69S, 39E) has been conducting continuous mesosphere, stratosphere and troposphere observations as the only MST/IS radar in the Antarctic [Sato et al., 2014]. These observation techniques are characterized by their three dimensional wind velocity measurement ability including vertical wind component with high time/height resolutions.
The mesosphere observations, however, need ionized media in the mesosphere and are limited to day-light hours. To compensate this we have developed an external interferometry system for reception which can detect meteor echoes throughout a day in the height region of 70-95 km as purely by-products of the routine mesosphere measurements. A pioneering external meteor system attached to the MU radar, Japan, by Nakamura et al [1997] is a proto-type of the current system.
The newly developed system, consisting of five Yagi antennas, has continuously been operating since March 2021. Figure 1 shows daily mean wind velocities observed from March 2021 to January 2022. The zonal component is eastward in winter and westward in summer showing a clear seasonal pattern. The meridional component blows equatorward (northward) in summer, corresponding to the gravity-wave driven meridional circulation pattern. Analyses of atmospheric waves are further to be made.
References
Sato et al., 2014, J. Atmos. Sol.-Terr. Phys., 118, 2−15, doi:10.1016/j.jastp.2013.08.022.
Nakamura et al., 1997, Radio Sci., 32, 1203-1214.
The mesosphere observations, however, need ionized media in the mesosphere and are limited to day-light hours. To compensate this we have developed an external interferometry system for reception which can detect meteor echoes throughout a day in the height region of 70-95 km as purely by-products of the routine mesosphere measurements. A pioneering external meteor system attached to the MU radar, Japan, by Nakamura et al [1997] is a proto-type of the current system.
The newly developed system, consisting of five Yagi antennas, has continuously been operating since March 2021. Figure 1 shows daily mean wind velocities observed from March 2021 to January 2022. The zonal component is eastward in winter and westward in summer showing a clear seasonal pattern. The meridional component blows equatorward (northward) in summer, corresponding to the gravity-wave driven meridional circulation pattern. Analyses of atmospheric waves are further to be made.
References
Sato et al., 2014, J. Atmos. Sol.-Terr. Phys., 118, 2−15, doi:10.1016/j.jastp.2013.08.022.
Nakamura et al., 1997, Radio Sci., 32, 1203-1214.