玉林夏季高温天气气候特征与环流形势分析  

Analysis on Climatic Characteristics and Weather Patterns of Summer High Temperature Weather in Yulin City

作　　者：刘金裕 林确略 陆丽安 孙素琴[3] 

机构地区：[1]玉林市气象局,广西玉林537000 [2]南宁市气象局,广西南宁530022 [3]江西省气象局,江西南昌310000

出　　处：《气象研究与应用》2011年第4期6-12,I0001,共8页Journal of Meteorological Research and Application

摘　　要：利用近50年(1961～2010年)广西玉林站的气温、风、相对湿度、日照等地面观测资料及历史天气图、NCEP/NCAR再分析资料,统计分析了玉林夏季高温天气的气候特征并探讨出现高温天气的大气环流形势。结果表明:(1)玉林高温天气主要出现在6～9月,3d以上的持续高温主要出现在7～8月,且高温日数的年际差异很大。玉林高温天气过程期间的日平均风速小、日平均相对湿度大、平均气温高和月平均日照时数偏多。(2)玉林出现高温天气的大气环流形势主要有副热带高压(以下简称副高)控制型、热带气旋外围型和副高与热带气旋共同影响型三类;高温持续时间与副高强度密切相关,当副高强,范围大,位置偏西,控制整个华南地区时,玉林容易出现持续高温;热带气旋外围下沉气流影响易出现极端最高气温;副高和热带气旋联合影响能使高温持续时间加长,强度加剧。Based on the observation data of surface temperature, wind, relative humidity and solar radiation of Yulin station in recent 50 years （1961-2010） , the historical weather maps and NCEP/ NCAR reanalysis data, the climatic characteristics of high temperature summer weather were statistically analyzed and its general circulation features are discussed. The results showes that 1） the hot days usually occurred in June to September and the cases, which last at least 3 hot days, mainly happened in July to August. The days of hot varied greatly between years. There are small daily mean wind speed, high daily mean relative humidity and temperature, as well as greater monthly mean sunlight hours during hot weather process. 2） There are three types of large-scale circulation, which would cause the hot weather： the subtropical high controlling type, tropical cyclone periphery type and the subtropical high coinciding with tropical cyclone type. The lasting time of high temperature weather was closely related to the intensity of subtropical high. While the subtropical high was strong, expanded more wests and covered the South China, there were usually appearing the hot weather; when the downward flow of tropical cyclone affected Yulin, the extreme heat days often happened; when the subtropical high affected Yulin associated with the tropical cyclone, the heat days persist and the temperature would be higher.

关 键 词：玉林 夏季高温 气候特征 平均风速 相对湿度 副高 环流形势 

分 类 号：P466[天文地球—大气科学及气象学]