[1]古明悦.南宁市2～4月“回南天”天气气象要素变化特征分析[J].气象研究与应用,2015,36(02):21-25,30.
　Gu Ming-yue.Analysis of High-humidity Weather during February to April in Nanning[J].Journal of Meteorological Research and Application,2015,36(02):21-25,30.
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南宁市2～4月“回南天”天气气象要素变化特征分析()
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气象研究与应用[ISSN:1673-8411/CN:45-1356/P]

卷:
第36卷
期数:
2015年02期
页码:
21-25,30
栏目:
天气气候
出版日期:
2015-12-21

文章信息/Info

Title:
Analysis of High-humidity Weather during February to April in Nanning
作者:
古明悦
南宁市气象局, 南宁 530029
Author(s):
Gu Ming-yue
Nanning Municipal Meteorological Service, Nanning 530029
关键词:
2~4月; “回南天”天气; 气象要素
Keywords:
high-humidity weather; meteorological elements; statistical characteristic
分类号:
P448
摘要:
利用南宁市气温、海平面气压、露点温度、水气压等气象要素资料与探空分析资料,ECMWF分析资料,对2006~2014年南宁市2~4月"回南天"天气过程进行了气象条件特征分析,结果表明:(1)南宁市"回南天"天气主要出现在2~3月,年平均出现3次,出现次数最多年6次,出现次数最少年1次,最长持续天数6天;(2)当2月份月平均气温出现异常偏低或异常偏高,3月份月平均气温出现异常偏高时,当月不易出现"回南天"天气,当4月份月平均气温出现异常偏低时,易出现"回南天"天气;(3)近9年2~4月南宁市出现5次明显"回南天"天气过程,各次过程发生前12小时南宁锋面逆温层顶已降到≤925hPa,925hPa有≥10m·s-1的偏南风,近地层大气接近或达到饱和状态;(4)5次明显"回南天"天气过程发生前后出现了明显的降压、升温和增湿现象,过程前一日20时开始温度露点差呈持续下降趋势,在过程当日08时左右到达最低值,表明空气达到或接近饱和,"回南天"天气在此阶段开始。
Abstract:
Based on temperature,sea level pressure,dew point temperature,water pressure data,air sounding data and ECMWF reanalysis data,the characteristics of climate and weather conditions of highhumidity weather from February and March during 2006 to 2014 were analyzed.The results show that:(1) The special high-humidity weather in Nanning mainly appears in February and March (3 times a year on average with the maximum being 6,minimum being 1,and the longest duration being 6 days); (2) when the average temperature of February shows abnormal lower or higher,or the average temperature of March shows abnormal higher,then the special high-humidity weather may not occur event,but when the average temperature of April shows abnormal lower,the special high-humidity weather may occur. (3) Nanning occurred 5 times serious special high-humidity weather during February to April in recent 9 years,with the frontal inversion layer roof having dropped to 925 or less hpa and the speed of S-SSW ≥ 10m·s-1 and surface layer atmosphere closing to or reaching saturation state before 12 hours of all the process appearing;(4) There are obvious atmospheric pressure reducing,temperature rising and humidity increasing,before or after the occurring these 5 serious special high-humidity weather,the depression of the dew point was persistent decreasing since 20:00 in the day which previous high-humidity weather event started,and it came to its’minimum value near 8:00 in the second day,this phenomenon indicates that the air closed to or reached saturated and this is the start of high-humidity weather.

备注/Memo

备注/Memo:
收稿日期:2015-01-15。
作者简介:古明悦(1987-),男,助理工程师,主要从事短期天气预报工作。
更新日期/Last Update: 1900-01-01