Mesospheric winds derived from SuperDARN HF radar meteor echoes at Halley, Antarctica
Mesospheric winds derived from SuperDARN HF radar meteor echoes at Halley, Antarctica
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来自南极洲哈雷 SuperDARN HF 雷达流星回波的中层风
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
M. Jarvis
中科院分区：
文献类型：
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作者：
B. Jenkins;M. Jarvis
中间层风是从南极洲哈雷（南纬76度，西经27度）流星回波的高频雷达观测中得出的。这些流星回波是在雷达的第一距离门（小于500公里）内观测到的，其特征是谱宽低于电离层E区等离子体不规则性后向散射的回波。推导出的风与哈雷上空独立测量的中层风具有一阶一致性。重力波特征（例如，<2小时周期）和较小尺度的风结构内的时空数据形成的16个波束。目前正在利用现有的雷达数据建立这种观测的数据库，这些数据涵盖了从1988年至今几乎一个完整的太阳活动周期。
Mesospheric winds are derived from HF radar observations of meteor echoes at Halley (76°S, 27°W), Antarctica. These meteor echoes are observed within the first range gates of the radar (less than 500 km) and are characterised by lower spectral widths than echoes backscattered from plasma irregularities in the E region of the ionosphere. The derived winds show first order agreement with mesospheric winds measured independently over Halley. Gravity wave signatures (e.g. <2-h period) and smaller-scale structure in the winds are revealed within the spatiotemporal data formed by the 16 beams. A data base of such observations is being built up from existing radar data extending over nearly a full solar cycle from 1988 to the present day.