doi:  10.3878/j.issn.1006-9895.1709.17116
三种温湿参数下昆明准静止锋锋面位置及锋生函数诊断的对比分析

Comparative Analysis of Kunming Quasi-Stationary Front Position and the Frontogenesis Function Diagnosis of Three Kinds of temperature humidity index
摘要点击 464  全文点击 75  投稿时间:2017-01-25  修订日期:2017-09-18
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基金:  41365006和41205067
中文关键词:  位温,相当位温,广义位温,昆明准静止锋,锋生函数
英文关键词:  Potential  temperature,Equivalent  potential temperature,Generalized  potential temperature,Kunming  quasi-stationary  front
        
作者中文名作者英文名单位
段旭Duan Xu云南省气象科学研究所
张亚男Zhang Yanan云南大学大气科学系
梁红丽Liang Hongli云南省气象台;云南省气象台
引用:段旭,张亚男,梁红丽.2018.三种温湿参数下昆明准静止锋锋面位置及锋生函数诊断的对比分析[J].大气科学
Citation:Duan Xu,Zhang Yanan,Liang Hongli.2018.Comparative Analysis of Kunming Quasi-Stationary Front Position and the Frontogenesis Function Diagnosis of Three Kinds of temperature humidity index[J].Chinese Journal of Atmospheric Sciences (in Chinese)
中文摘要:
      针对2008年1-2月昆明准静止锋天气过程,讨论了位温、相当位温和广义位温等三个温湿参数及其对应的锋生函数,对比分析结果表明:(1)广义位温因其湿度因子权重过大,不适用于分析以温度梯度定义的昆明准静止锋锋面位置和强度;(2)理想状态下的干大气位温和饱和大气相当位温仅与气压和温度有关,均能较好地反映大气温度场特征,适用于昆明准静止锋的分析,比较而言相当位温对温度锋区的描述更为显著;(3)用位温或相当位温计算锋生函数所得结果直接表达了因温度场变化导致的锋面生消状况,而用广义位温计算锋生函数所得结果同时包含温度锋生(消)和湿度锋生(消)两种情况,不能简洁明了地判断昆明准静止锋锋面生消状况。
Abstract:
      Aimed at the weather process of Kunming quasi-stationary front(KQSF) in early 2008,this paper discusses the temperature humidity index and the corresponding frontogenesis function of potential temperature(PT),equivalent potential temperature(EPT)and generalized potential temperature(GPT), of which the results demonstrate that: (1) Due to the humidity factor large weight of the GPT,it is not suitable for the analysis of the positions and intensity of the KQSF in the definition of temperature gradient;(2) In the ideal state, the dry atmospheric PT and the saturated atmospheric EPT are only related to temperature and pressure, which can better describe the characteristics of the atmospheric temperature field and apply to the analysis of the KQSF, so in comparison, the EPT can describe the temperature frontal zone more significantly;(3) Calculation results of frontogenesis function used by the PT or the EPT can directly present the situation of frontogenesis and frontolysis caused by the change of temperature field, while the result of the GPT is able to indicate the temperature frontogenesis (frontolysis) and humidity frontogenesis (frontolysis) at the same time, yet it cannot be simply adopted to judge the front frontogenesis or frontolysis situation of the KQSF.
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