| 基于探空资料的江西典型冻雨天气过程垂直结构分析 |
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| 引用本文： | 王华军,刘熙明,吴琼,马中元.基于探空资料的江西典型冻雨天气过程垂直结构分析[J].气象与减灾研究,2010,33(1):40-45. |
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| 作者姓名： | 王华军 刘熙明 吴琼 马中元 |
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| 作者单位： | 1. 吉安市气象台,江西,吉安,343000
2. 江西省气象科学研究所,江西,南昌,330046 |
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| 基金项目： | 国家自然科学基金，江西省科技厅科技支撑项目，江西省自然科学基金，江西省气象局重点科研项目，中国气象科学研究院灾害天气国家重点实验室基金 |
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| 摘 要： | 利用探空资料和地面观测资料,对1959—2008年发生在江西的典型冻雨天气过程的大气垂直结构进行了分析。结果表明:冻雨的形成与大气饱和层、冰晶层、暖层、逆温层、冷层及特征物理量等因素的关系密切。对流层中下层的大气呈饱和或准饱和的逆温状态,饱和层顶位于暖层之上是冻雨发生的主要层结特征。冰晶层底部的平均高度为675hPa,平均厚度为2309m;暖层底部的平均高度为834hPa,平均温度为4.1℃,平均厚度为1765m;逆温层的平均温差为7.5℃;冷层的平均厚度为1668m,平均最低温度为-3.9℃;平均地面最低温度为-1.2℃;冻雨发生时大气整层比湿积分指数须增大为1000以上,干暖盖强度指数须降到-5℃以下。
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| 关 键 词： | 冻雨 温湿层结 逆温 垂直结构 |
ANALYSIS OF VERTICAL STRUCTURE OF JIANGXI TYPICAL FREEZING RAIN PROCESSES BASED ON SOUNDING DATA |
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| Wang Huajun,Liu Ximing,Wu Qiong,Ma Zhongyuan.ANALYSIS OF VERTICAL STRUCTURE OF JIANGXI TYPICAL FREEZING RAIN PROCESSES BASED ON SOUNDING DATA[J].Meteorology and Disaster Reduction Research,2010,33(1):40-45. |
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| Authors: | Wang Huajun Liu Ximing Wu Qiong Ma Zhongyuan |
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| Institution: | 1.Jian Municipal Meteorological Bureau,Jian 343000,China 2.Meteorological Sciences Institute of Jiangxi Province,Nanchang 330046,China |
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| Abstract: | The atmospheric vertical structures of typical freezing rain weather processes occurred in Jiangxi during 1959—2008 are analyzed.The results show that the formation of freezing rain is closely related to the atmospheric saturated layer,ice layer,warm layer,inversion layer,cold layer and the characteristic physical quantities.The main stratification structures for freezing rain occurrence are that the atmosphere at mid-lower troposphere is saturated or quasi-saturated,and the top of saturated layer lies above the warm layer.For the ice layer,the average thickness is 2 309 m,the average height of bottom is 675 hPa.For warm layer,the average temperature is 4.1 ℃,the average thickness is 1 765 m,and average height of bottom is 834 hPa.For the inversion layer,the average temperature difference is 7.5 ℃.The average thickness of cold layer is 1 668 m,with the average minimum temperature being-3.9 ℃.And the surface mean minimum temperature is-1.2 ℃.Freezing rain occurs when index of the specific humidity of whole atmosphere layer integration increases to more than 1 000 and the dry warm-lid strength index decreases below-5 ℃. |
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| Keywords: | Freezing rain Temperature and humidity stratification Temperature inversion Vertical structure |
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