河南省一次大雾的数值模拟及生消机制分析 |
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引用本文: | 王金兰,寿绍文,刘泽军,王新红,田春娜. 河南省一次大雾的数值模拟及生消机制分析[J]. 河南气象, 2008, 31(1): 39-44 |
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作者姓名: | 王金兰 寿绍文 刘泽军 王新红 田春娜 |
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作者单位: | [1]南京信息工程大学江苏省气象灾害重点实验室,南京210044 [2]新乡市气象局,河南新乡453003 [3]广西自治区气象减灾研究所,南宁530022 |
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基金项目: | 国家自然科学基金项目(40775033、40405009、40575022、40205008);江苏省自然科学基金项目(BK2005141);江苏省气象灾害重点实验室基金项目(KLME050201)资助 |
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摘 要: | 应用非静力平衡中尺度模式MM5及NCEP资料和高空地面资料,模拟分析了2006年1月28日发生在河南省的一次大雾天气过程,结果发现:这次雾体最强的时段在日出后1~2h内,相对湿度下降的拐点滞后于气温回升的拐点2h左右;先出现贴地逆温再出现大雾,逆温最强的时段也是雾体最强的时段,逆温层顶始终覆盖在雾体上方;近地面的微风和风向的转变,有利于雾体的形成和向上发展,风向转变的时间也是雾体形成的时间;增温、减湿和逆温层的破坏是大雾消散的主要原因。
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关 键 词: | 大雾 数值模拟 生消机制 |
Numerical Simulation and Development Mechanism Analysis of Heavy Fog Process in Henan Province |
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Affiliation: | Wang Jinlan, Shou Shaowen , Liu Zejun , Wang Xinhong,Tian Chunna( 1. Nanjing University of Information Science and Technology, Jiangsu Key Laboratory of Meteorological Disaster, Nanjing 210044, China ; 2. Xinxiang Meteorological Office, Xinxiang 453003, China; 3. Guangxi Institute of Meteorology and Disaster -reducing Research, Nanning 530022, China) |
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Abstract: | This paper presents simulated results of heavy fog process that occurred on January 28, 2007 in Henan province using the non-static equilibrium mesoscale model MM5, the NCEP data, and the upper air and surface data. The results show the period of strongest fog time was behind sunrise 1 - 2 h, and the flex point of relative humidity decline was behind temperature uptrend about 2 h. It was earlier that ground-hugging inversion appeared than heavy fog, and the most inversion was consistent with the strongest fog, and the inversion layer was above the fog; the breeze and the wind shift of surface layer was favorable the heavy fog appearing and growing upwards ; the major reason of heavy fog vanishing was elevated temperature, dehumidification and destroyed inversion layer. |
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Keywords: | heavy fog numerical simulation appear and vanish mechanism |
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