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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Tidal wind mapping from observations of a meteor radar chain in December 2011
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Tidal wind mapping from observations of a meteor radar chain in December 2011

机译：潮风观测流星的映射2011年12月雷达链

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摘要

This article proposes a technique to map the tidal winds in the mesosphere and lower thermosphere (MLT) region from the observations of a four-station meteor radar chain located at middle- and low-latitudes along the 120°E meridian in the Northern Hemisphere. A 1 month dataset of the horizontal winds in the altitude range of 80-100 km is observed during December 2011. We first decompose the tidal winds into mean, diurnal, semidiurnal, and terdiurnal components for each station. It is found that the diurnal/semidiurnal components dominate at the low-latitude/midlatitude stations. Their amplitudes increase at lower altitudes and then decrease at higher altitudes after reaching a peak in the MLT region. Hough functions of the classical tidal theory are then used to fit the latitudinal distribution of each decomposed component. The diurnal component is found to be dominated by the first symmetric (1, 1) mode. Yet for the semidiurnal and terdiurnal components, the corresponding dominant modes are the second symmetric modes (2, 4) and (3, 5), and considerable contributions are also from the first antisymmetric modes (2, 3), (3, 4) and second antisymmetric modes (2, 5), (3, 6). Based on the decomposed results, we further map the horizontal winds in the domains of latitude, altitude and local time. The mapped horizontal winds successfully reproduce the local time versus altitudinal distributions of the original observations at the four stations. Thus, we conclude that the meteor radar chain is useful to monitor and study the regional characteristics of the tidal winds in the MLT region.
机译：本文提出了一种技术来映射潮汐风在中间层和降低热大气层(MLT)地区的观测四站流星雷达链位于沿着120°E中低纬度地区子午线在北半球。数据集水平风的高度射程80 - 100公里12月期间观察到的2011. 意思是,周日,半日,terdiurnal每个站的组件。日/半日组件主导的低纬度/中间纬度。在较低的海拔高度,然后振幅增加在高海拔达到降低峰在MLT地区。然后使用符合古典潮汐理论每个分解的纬向分布组件。由第一个对称的(1,1)模式。半日,terdiurnal组件,相应的主导模式是第二对称模式(2、4)和(3、5)也从相当大的贡献第一个反对称模式(2,3),(3、4)第二个反对称模式(2、5),(3、6)的基础分解结果,我们进一步映射水平风域的纬度,高度和当地时间。风成功繁殖当地时间最初的和高度的分布观察四站。得出结论,流星雷达链是有用的监测和研究区域的特征MLT地区潮风。

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