“回南天”的客观分析方法研究

Objective Analysis Method For “Huinan Weather”

通过理论假设推导出建筑物内壁温度与气温及15CM地温的关系式,利用历史"回南天"过程记录确定了关系式的相关系数,建立了建筑物内壁温度的拟合公式,有效的解决了长期以来困扰"回南天"观测资料缺少的难题;通过聚类分析,研究"回南天"主要天气影响系统及特征,结果表明南宁市"回南天"过程是在冷高压和暖低压的交替影响下产生,分为冷性结束和暖性结束两类过程,并总结两类过程的单站内壁温度、气温、露点、24小时日平均变压等要素变化特征和天气形势场特征,分析它们与"回南"影响时间及强度的关系,得出冷性结束"回南天"过程,"回南"持续时间长,强度强,出现频率高的结论。

we define the strength and standards of the humid weather by building the relationsip between the wall temperature, the air temperature and the 15CM ground temperature based on theoretical assumptions. Then based on historical records, we fixed the correlation coefficient of the relationship and establishmented a fitting formula of Nanning wall temperature and effective to solve the long troubled of the lack of observational. By cluster analysis to analyze the humid weather systems and the main weather feature, the resuhs show that the process of ＂Huinan Weather＂ is generated by alternating of cold high pressure and warm low pressure, and can be divided into two types of processes character as the ending of cold and warm. We also summarize the single-station wall temperature, surface air temperature, dew point, 24 hours daily average swing and the field characteristics of the two types, and get the relationship between impact time and intensity. The final result show that the ＂ Huinan Weather＂ character by the end of cold process has a longer time, higher intensity and higher frequency.