茂名地区极端降水时空分布特征分析  

Temporal and Spatial Distributions of Extreme Precipitation in Maoming Area

作　　者：陈冰[1] 陆卫华 宋祖钦 陈蔚烨 李英[1] Chen Bing;Lu Wei-hua;Song Zu-qin;Chen Wei-ye;Li Ying(Meteorological Bureau of Huazhou City, Guangdong Prouinoe, Huazhou Guangdong 525100;Meteorological Bureau of Gaozhou City, Guangdong Prouinoe, Gaozhou Guangdong 525200)

机构地区：[1]广东省化州市气象局,广东化州525100 [2]广东省高州市气象局,广东高州525200

出　　处：《气象研究与应用》2018年第1期6-10,共5页Journal of Meteorological Research and Application

基　　金：茂名市气象局课题"茂名极端降水天气天气触发机制及预报预警技术研究"

摘　　要：利用茂名地区近45a气象站逐日雨量资料,分析茂名极端降水事件的时空分布特征。结果表明,茂名地区各站极端降水的阈值与强度由南向北递减,平均年极端降水总量由西向东递减,极端降水频次的由西北向东南递减;极端降水事件发生的高峰月为6月,极端降水总量峰值月为8月;茂名地区极端降水总量、频数以及强度均呈增加趋势,年际变化明显;各极端降水指标突变特征不明显;年极端降水总量以及频次存在准3a短周期、12a长周期。Based on the daily rainfall data of 45 meteorological stations in Maoming area, this paper analyzed the temporal and spatial distribution characteristics of the extreme precipitation events in Maoming. The analysis showed that the threshold and intensity of extreme precipitation decreased from south to north, the average annual total precipitation decreased from west to east, and the frequency of extreme precipitation decreased from northwest to southeast. The occurrence of extreme precipitation events peaked in June and the total precipitation peaked in August. The total precipitation, frequency,and intensity of extreme precipitation in Maoming area tended to increase, and the inter-annual variation was distinct. The characteristics of sudden change of extreme precipitation index were not obvious. The annual total precipitation and frequency exist quasi-3 a short cycle, 12 a long cycle.

关 键 词：茂名地区 极端降水 极端降水指数 变化特征 

分 类 号：P46[天文地球—大气科学及气象学]