双流机场一次低能见度天气过程分析 |
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引用本文: | 岳炼,段炼.双流机场一次低能见度天气过程分析[J].高原山地气象研究,2020,40(3):66-72. |
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作者姓名: | 岳炼 段炼 |
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作者单位: | 中国民航飞行学院,广汉 618307;中国民航飞行学院,广汉 618307 |
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基金项目: | 中国民用航空飞行学院科研基金面上项目(J2018-46)国家自然基金面上项目(41975116)民航人才教育项目(0251829) |
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摘 要: | 利用机场常规观测资料(METAR报文)、ERA-Interim(1°×1°)再分析资料和温江气象站一日两次的探空资料,对2016年12月7~8日双流机场一次持续性低能见度天气过程进行了研究分析。结果表明:500hPa环流背景与此次低能见度天气过程的变化密切相关;逆温层高度及厚度的变化对整个演变过程起主导作用,同时逆温层的长期存在直接导致此次天气过程持续时间较长;晴朗的夜空、逆温层、地面冷却辐射、水汽饱和以及近地面的微风状况,共同作用致使生成辐射雾导致7日15时能见度急剧下降;整个过程地面风场处于微风条件且气压逐渐降低,两者对能见度的变化未起到决定性的作用。
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关 键 词: | 持续性低能见度 双流机场 辐射雾 高空环流 逆温层 |
收稿时间: | 2020-07-25 |
Analysis of A Low Visibility Weather Process in Shuangliu Airport |
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Institution: | Civil Aviation Flight University of China, Guanghan 618307, China |
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Abstract: | Using airport conventional observation data(METAR messages),ERA-Interim(1°×1°) reanalysis data and twice-a-day sounding data from Wenjiang Meteorological Station,a continuous low visibility weather process was carried out Research and analysis at Shuangliu Airport from December 7 to 8,2016. The results show that:①The 500 hPa circulation background is closely related to the changes in the low-visibility weather process;②The changes in the height and thickness of the inversion layer play a leading role in the entire evolution process,and the long-term existence of the inversion layer directly leads to the duration of the weather process Longer;③The clear night sky,inversion layer,ground cooling radiation,water vapor saturation,and the breeze near the ground,combined to generate radiation fog,resulting in a sharp drop in visibility at 15:00 on the 7 th;④The surface wind field was under breeze conditions during the whole process. The air pressure gradually decreased,and the two did not play a decisive role in the change of visibility. |
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