冀中廊坊市局地暴雨的温湿能量特征分析

The Analysis of Temperature-Humidity En-ergy Characteristics of Local Rainstorm in Langfang City of Central Hebei Province

摘要: 利用2010~2018年廊坊市暴雨资料，应用数理统计、能量天气学等方法对廊坊市局地暴雨的时空分布、环流形势、温湿能量特征等进行了深入分析，结果表明：1) 局地暴雨具有明显的分散性分布、较大强度差异，年际分布不均匀以及多发时段长、强度偏强等天气气候特征；2) 局地暴雨的大气环流形势主要有四类，其中有两类不属于暴雨的典型天气学概念模型，约77.5%的局地暴雨产生在与暴雨环流形势不相似的条件下；3) 局地暴雨产生前，温湿能距平较常年明显偏高，无短时强降水的局地暴雨较短时强降水超过50 mm/h的局地暴雨其各种能量明显偏小；4) 60%以上的局地暴雨，温湿能量较暴雨日前一天有不同程度下降。上述这些信息可为局地暴雨预报提供参考思路。

Abstract: Using the rainstorm data of Langfang city from 2010 to 2018, the spatial and temporal distribution, circulation situation and the characteristics of temperature-humidity energy of local rainstorm in Langfang were analyzed by mathematical statistics and the energy synoptic method. The results show that: 1) The obvious dispersed distribution, larger rainfall intensity difference, uneven interannual distribution, the longer frequent occurrence periods, and the stronger rainfall intensity were the weather and climate characteristics of local rainstorm in Langfang city. 2) There were four types of atmospheric circulation situation of local rainstorm, among which two types were not belong to the typical synoptic conceptual model of rainstorm. About 77.5% of local rainstorm occurred under the conditions which were not similar to the circulation situation of rainstorm. 3) Before the occurrence of local rainstorm, the temperature-humidity energy anomalies were obviously higher than that of the normal year and the energies of the local rainstorm without short-term heavy rainfall were lower than that of local rainstorm with short-term heavy rainfall more than 50 mm/h. 4) More than 60% of local rainstorm, the energies of temperature-humidity decreased to some extent compared with that of the day before heavy rainfall. The information above mentioned can be used as a reference for local rainstorm forecast.