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气象:2014,40(7):827-834
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近52年广东开汛期特征及与前汛期降水的关系分析
(1.广东省气候中心,广州 510080;2.广州地理研究所,广州 510070;3.中国科学院广州地球化学研究所,广州 510640;4.中国科学院研究生院,北京 100049)
Characteristics of Rain Season Onset Date and Its Relationship with First Rainy Season Precipitation of Guangdong in Recent 52 Years
(1.Guangdong Climate Centre, Guangzhou 510080;2.Guangzhou Institute of Geography, Guangzhou 510070;3.Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640;4.Graduate University of Chinese Academy of Sciences, Beijing 100049)
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投稿时间:2013-04-22    修订日期:2013-10-19
中文摘要: 利用广东省86个气象台站近52年(1962—2013年)逐日降水量资料,统计了逐年各台站及全省开汛期(rain season onset date/RSOD),并对广东省开汛特征及其与前汛期降水的关系进行了分析。分析结果表明:(1)广东省开汛期多集中在3月下旬至4月中旬,最早和最迟开汛期相差94 d;(2)广东省东南大部、北部大部较中部大部和西南部开汛早,雷州半岛开汛最迟;(3)广东省开汛可分为突发型开汛和渐进型开汛两种类型;(4)广东省开汛期年(代)际变化特征明显,存在15~16 a的年代际振荡周期,1986年为年代振荡周期变化的转折点,前后分别存在8 a和5~6 a的年代振荡周期;(5)各台站开汛期与3月下旬及4月降水相关性最好,与5、6月及前汛期降水的相关性差;(6)广东开汛异常偏早(晚)年,其前冬500 hPa高度场存在明显差异。
Abstract:Based on recent 52 years (1962-2013) daily precipitation data of 86 weather stations in Guangdong, the annual rainy season onset dates (RSOD) of each station were counted, and the characteristics of the rainy season onset and its relationship with the first rainy season precipitation were analyzed. The results indicate that: (1) The RSOD is mainly concentrated in the last dekad of March to the mid dekad of April, and there is a 94 d gap between the earliest and the latest dates; (2) The rainy season begins earlier in southeast and north of Guangdong than in the southwestern part, and the latest in Leizhou Peninsula; (3) The rainy season begins in the two types of abrupt onset and gradual onset; (4) The RSOD has an inter decadal oscillation period of 15-16 years, and respective inter annual oscillation period of 8 years and 5-6 years pre and post 1986; (5) The RSOD has good correlations with late March and April precipitation but is poor with precipitation in May, June and the first rainy season; (6) The 500 hPa circulation differs greatly between the RSOD earlier years and the later years.
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基金项目:华南区域气象中心科技攻关重点项目(GRMC2012Z04和GRMC2014Z01)共同资助
引用文本:
刘尉,罗晓玲,陈慧华,黄珍珠,2014.近52年广东开汛期特征及与前汛期降水的关系分析[J].气象,40(7):827-834.
LIU Wei,LUO Xiaoling,CHEN Huihua,HUANG Zhenzhu,2014.Characteristics of Rain Season Onset Date and Its Relationship with First Rainy Season Precipitation of Guangdong in Recent 52 Years[J].Meteor Mon,40(7):827-834.