为了正确认识青藏高原山地低层大气风场特征及其对民航机场飞行安全的影响，采用地面测风仪与风廓线仪观测资料，分析研究了藏东南雅鲁藏布江河谷中林芝机场低层风场垂直结构及变化特征。结果表明，林芝机场所在的雅鲁藏布江河谷内，风场以正交于河谷方向的东南风为主，整层风场具有较为一致的日变化和季节变化特征，午后地面和河谷内低层强东南风将对飞机的进近及起降安全产生不利影响; 雅鲁藏布江河谷外，风场基本分为两层，低层与高层风场的日变化和季节变化规律差异很大，高层风场是大尺度环流的表现。雅鲁藏布江河谷内风场与河谷外高层大尺度环流间缺乏动力学联系。
To better understand the wind system in the Tibetan mountains and its impacts on the civil aviation safety, the vertical structure and variation of the low-level winds over the Nyingchi Airport, in the Yarlung Zangbo valley of the Southeast Tibet, are analyzed and discussed, based on the observed wind data. It is revealed that the winds on the surface and in the Yarlung Zangbo valley have consistent diurnal and seasonal variations, with a dominating southeasterly across the airport runway. A strong lateral wind, with an averaged maximum speed over 6.0 m·s-1, in the afternoon could greatly lower the approaching, taking-off and landing flight safety. Above the Yarlung Zangbo valley, the wind field can be divided into two layers, with different diurnal and seasonal variations. The winds in the upper layer reflect the large-scale circulation over this region. The winds in the Yarlung Zangbo valley have almost no kinetic relation to the upper layer winds over the valley. Therefore, to alert and predict the strong wind threatening the flight safety, understanding the wind system in the valley is essentially necessary.
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