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首页> 外文期刊>Earth, planets and space: EPS >Some results of comparison between the lower thermosphere zonal winds as seen by the ground-based radars and WINDII on UARS
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Some results of comparison between the lower thermosphere zonal winds as seen by the ground-based radars and WINDII on UARS

机译：地基雷达和UARS上的WINDII观测到的较低热圈纬向风的比较结果

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摘要

The seasonal variations of the zonal winds measured by meteor/MF radars and by the wind-imaging interferometer (WINDII) on board of the UARS satellite, are analyzed and compared with the ground-based Global Empirical Wind Model (GEWM) and satellite-based WINDII prevailing wind model, which are independently derived from the observational data sets. A general consistency in the main global scale wind structures is observed. The seasonal variations of zonal wind in the both models are described by almost the same annual and semi-annual components. But systematic bias is found for the annual mean zonal winds of the two models, with the GEWM winds generally smaller than those of WINDII by factor 2-2.5. This bias is practically independent of altitude and can be described by a term of A cos 4x, where A is about 20 m/s and x is colatitude. Possible origin of this offset is discussed.
机译：利用流星/中频雷达和UARS卫星上的风影干涉仪（WINDII）测量的纬向风的季节变化进行了分析，并与基于地面的全球经验风模型（GEWM）和基于卫星的WINDII盛行风模型，独立于观测数据集而得出。在主要的全球尺度风结构中观察到总体一致性。两种模式中纬向风的季节变化几乎由相同的年度和半年度成分描述。但是两个模型的年平均纬向风存在系统性偏差，GEWM风通常比WINDII的风小2-2.5。该偏差实际上与海拔高度无关，可以用A cos 4x的术语来描述，其中A约为20 m / s，x为colatitude。讨论了此偏移量的可能来源。

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