Radar observations of the quarterdiurnal tide at midlatitudes: Seasonal and long-term variations
Radar observations of the quarterdiurnal tide at midlatitudes: Seasonal and long-term variations
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DOI：
10.1016/j.jastp.2017.05.014
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发表时间：
2017-10
影响因子：
1.9
通讯作者：
C. Jacobi;Amelie Hoff (née: Krug);E. Merzlyakov
中科院分区：
文献类型：
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作者：
C. Jacobi;Amelie Hoff (née: Krug);E. Merzlyakov
季节性和年际变化的四分之一昼夜潮汐分析使用流星雷达风观测在两个中纬度网站科尔姆和奥布宁斯克。潮汐振幅一般随高度增加而增加。最大潮汐振幅出现在冬季。平均而言，经向振幅小于纬向振幅。季节主要在夏季和冬季之间不同。纬向和纬向相位相差略小于90°。垂直波长在冬季很长，但在夏季较短，约为20公里。科尔姆和奥布宁斯克的振幅和相位一致，表明迁移的半日潮可能是负责观察到的波的主要部分。自1980年以来的观测表明，潮汐振幅总体上有所增加，尽管这种增加不是线性的，但主要发生在20世纪90年代末和21世纪初。
The seasonal and interannual variability of the quarterdiurnal tide is analysed using meteor radar wind observations at the two midlatitude sites Collm and Obninsk. Generally tidal amplitudes increase with height. Maximum tidal amplitudes are found in winter. Meridional amplitudes are smaller than zonal ones on an average. Phases mainly differ between summer and winter. Zonal and meridional phases differ by slightly less than 90°. The vertical wavelengths are very long in winter, but shorter and on the order of 20 km in summer. Collm and Obninsk amplitudes and phases agree well, indicating that the migrating quarterdiurnal tide may be responsible for a major part of the observed waves. Observations since 1980 show that the tidal amplitudes have increased on a whole, although the increase is not linear but mainly happening during the late 1990s and the early 2000s.