| 利用风廓线雷达资料分析大理机场飑线天气过程的风垂直变化特征 |
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| 引用本文： | 王周鹤,赵建伟.利用风廓线雷达资料分析大理机场飑线天气过程的风垂直变化特征[J].新疆气象,2020,14(2):75-80. |
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| 作者姓名： | 王周鹤 赵建伟 |
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| 作者单位： | 云南机场集团大理机场,云南机场集团大理机场 |
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| 摘 要： | 飑线天气现象是航空气象中危险和复杂的天气现象之一,2018年大理机场出现两次飑线天气过程,利用风廓线雷达资料和航空气象地面观测资料,分析两次飑线天气过程的风垂直变化特征。结果表明:(1)在飑线天气过程开始前2～4 h,从底层到高层均出现明显的上升运动,飑现象开始前后,上升运动和下沉运动同时存在,为大气中垂直热交换过程提供了有利条件;(2)飑线天气过程存在垂直风的水平切变及垂直切变,反映了强烈的对流发展,发展到离地高度5000 m以上;(3)飑线天气过程存在径向速度突变增大、谱宽变宽和单波束径向速度折叠现象,说明本场出现的是风雨交加的强对流天气;(4)高空到地面存在湍流运动,能量交换频繁,气流紊乱。
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| 关 键 词： | 风廓线雷达，飑线，频谱，航空气象保障，风切变 |
| 收稿时间： | 2018/12/18 0:00:00 |
| 修稿时间： | 2019/2/9 0:00:00 |
Analysis of Vertical Characteristics of Wind Profiler Radar for Squall Line at Airport |
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| wang zhou he and.Analysis of Vertical Characteristics of Wind Profiler Radar for Squall Line at Airport[J].Bimonthly of Xinjiang Meteorology,2020,14(2):75-80. |
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| Authors: | wang zhou he and |
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| Abstract: | The squall lines are one of the most dangerous and complicated weather patterns in aviation meteorology. In 2018, two squall lines occurred at Dali airport. Using a wind profiler and surface meteorological observations, the results were as followings. 1) There was a distinct bottom-up movement before the squall line began. After the squall line began, upward and downward motions coexisted. This indicates that there was a vertical heat exchange in the atmosphere. 2) Horizontal and vertical shear winds coexisted, indicating a strong convective development at elevations above 5,000 meters. 3) The abrupt increase of the radial velocity and spectral widths indicate that the field has strong convective weather mixed with wind and rain. 4) Turbulence existed from high altitudes down to the ground. The study of squall weather patterns was conducted to provide a reference for the identification and prediction of squall weather phenomena. |
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| Keywords: | Wind Profiler Squall Line Spectrum Aviation Meteorological Support Wind Shear |
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