雷州半岛热带气旋降水的时空分布及变化特征  

Spatial and Temporal Distribution and Variation Characteristics of Tropical Cyclone Precipitation in Leizhou Peninsula

作　　者：符靖茹 沈碧辉 于洲 韩冬 毛海波 文彬 劳汉琼 FU Jingru;SHEN Bihui;YU Zhou;HAN Dong;MAO Haibo;WEN Bin;LAO Hanqiong(Zhanjiang Meteorological Bureau of Guangdong Province,Zhanjiang,Guangdong 524001,China;Sihui Meteorological Bureau of Guangdong Province,Zhaoqing,Guangdong 526200,China;Jilin Meteorological Service Center,Changchun,Jilin 130000,China)

机构地区：[1]广东省湛江市气象局,广东湛江524001 [2]广东省四会市气象局,广东肇庆526200 [3]吉林省气象局,吉林长春130000

出　　处：《热带农业科学》2020年第6期71-76,共6页Chinese Journal of Tropical Agriculture

基　　金：广东省湛江市重点项目雷州半岛台风风雨影响研究(No.2018A03);鹤地水库上游集雨区的台风降水分析和预测(No.2019A01);湛江精细化网格降水预报能力提升研究(No.2016A01);雷州半岛台风、暴雨分析及气象要素统计查询系统(No.2017A01)。

摘　　要：利用1963~2018年中国《热带气旋年鉴》和雷州半岛6个国家观测站降水资料,分析雷州半岛热带气旋及其降水的变化特征。结果表明:影响雷州半岛的热带气旋频数具有明显的年际变化,最多的年份有8个,最少年份无热带气旋影响,年平均为4.4个;7~9月是热带气旋影响高峰期,7~10月是强热带气旋出现最多的时期;每年平均有368 mm的降水由热带气旋引起,约占雷州半岛年总降水的22%,但呈现0.9/10 a的下降趋势;热带气旋降水变化的空间特征表现为明显的一致性,具体表现为高值区分布在中南部,北部为低值区,最大特征值位于雷州市。时间特征表现为明显的周期性,具有8 a的主周期,主要出现在20世纪80年代至21世纪初。第二主周期为2~3 a,主要出现在80年代前。The tropical cyclones data and the daily precipitation data of 6 stations from 1963 to 2018 were used for analysis of the characteristics of the tropical cyclones and the resultant precipitation in Leizhou Peninsula.The results showed that the annual number of tropical cyclones changed significantly with an average of 4.4 each year,maximum 8 and minimum 0.The most active period of tropical cyclones was from July to September and the stronger intensive tropical cyclones almost occurred from July to October.Commonly,the tropical cyclones brought precipitation with an average of 368 mm/year in Leizhou Peninsula,which accounted for about 22 percent of the total precipitation in Leizhou Peninsula and tended to decrease linearly by 0.9 percent every 10 years.The spatial distribution of tropical cyclone precipitation had a significant consistency in that the high precipitation value was distributed in the central and southern regions and that the low precipitation value fell in the north regions in Leizhou Peninsula.The highest characteristic value was distributed in Leizhou City.The temporal distribution of tropical cyclone precipitation showed an obvious periodical change with 8 years as a main period,which mainly occurred in the 1980s to the early 21st century,and with 2-3 years as the second main period,which mainly occurred before the 1980s.

关 键 词：雷州半岛 热带气旋降水 EOF MORLET小波分析 

分 类 号：S567.239[农业科学—中草药栽培]