MF radar observations of the diurnal tide over Syowa, Antarctica (69° S, 40° E)
MF radar observations of the diurnal tide over Syowa, Antarctica (69° S, 40° E)
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DOI：
10.5194/angeo-27-2653-2009
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发表时间：
2009-07
影响因子：
1.9
通讯作者：
Y. Tomikawa;M. Tsutsumi
中科院分区：
文献类型：
--
作者：
Y. Tomikawa;M. Tsutsumi
抽象的。利用悉尼站(69°S，39.6°E)10年中频雷达资料，研究了南极中层和低热层(MLT)的昼夜潮汐特征。纬向风和经向风的昼夜振幅和位相的季节变化和高度相关性与以前使用其他南极站资料进行的研究基本一致。日潮引起的经向动量通量在90公里以上和90公里以下表现出明显不同的季节变化，这在文献中从未见过报道。最后，讨论了GSWM-02日潮汐观测与模拟结果存在差异的原因。这意味着重力波在模拟中的逼真表示对于真实地模拟日潮汐是至关重要的。
Abstract. Characteristics of the diurnal tide in the Antarctic mesosphere and lower thermosphere (MLT) are investigated using 10 years of medium frequency (MF) radar data from Syowa Station (69° S, 39.6° E). Seasonal variations and height dependence of the diurnal amplitude and phase of zonal and meridional winds are mostly consistent with previous studies using the other Antarctic station data. The meridional momentum flux due to the diurnal tide shows a seasonal variation clearly different between above and below 90 km, which has never been reported in the literature. Finally, a cause of some discrepancy in the characteristics of the diurnal tide between the observation and simulation (i.e., GSWM-02) is discussed. It implies that the realistic representation of gravity waves in the simulation is crucial for realistic modeling of the diurnal tide.