| 2014年成都地区一次连续性大雾天气的成因分析 |
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| 引用本文： | 唐钱奎,鲁燕,张涛,等.2014年成都地区一次连续性大雾天气的成因分析[J].高原山地气象研究,2018,38(1):57-61. |
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| 作者姓名： | 唐钱奎 鲁燕 张涛 等 |
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| 作者单位： | 1. 四川省成都市气象局, 成都 610071; |
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| 摘 要： | 本文利用常规气象观测资料和NCEP1°×1°再分析资料对2014年1月31日～2月1日成都地区连续性大雾天气过程的环流背景、气象要素及相关物理诊断量进行分析,结果表明:本次持续性大雾天气过程是在500h Pa西北气流和地面均压场的环流形势下发生的,属于平流-辐射雾。前期降水、偏南水汽和西风扰动水汽为本次大雾形成提供了水汽条件。低层暖平流输入、水汽辐合以及辐合上升运动有利于大雾的形成和维持;反之,则大雾消散。逆温层高度及强度、双逆温结构、冷平流入侵厚度和湿层厚度与雾的浓度密切相关。
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| 关 键 词： | 雾 平流-辐射雾 逆温层 温度平流 |
| 收稿时间： | 2018-03-10 |
Analysis of the Causes of a Sustained Foggy Weather in Chengdu in 2014 |
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| Institution: | 1. Chengdu Meteorological Bureau, Chengdu 610071, China;2. Wenjiang Meteorological Bureau, Chengdu 611130, China;3. Jintang Meteorological Bureau, Jintang 611400, China |
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| Abstract: | On the basis of the routine meteorological data and the reanalysis data from the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) , the related circulation background, the meteorological fields and the physical quantity field of the foggy weather happened in Chengdu from January 31 to February 1, 2014 are studied. The results showed that this process was composed of radiation and advection fog, happened under the circulation of northwesterly flow in the 500 h Pa and uniform pressure field in the sea level pressure. The weak precipitation before the process, the water vapor from the south wind and the disturbed western wind provided the vapor conditions. The warm advection form the lower level, vapor convergence and the ascending motion were beneficial to the formation and the maintain of this process. The height and intensity of the inversion layer, the double inversion structure, the thickness of the intruding cold advection and the thickness of the humidity layer are closely related to the concentration of the fog. |
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