文献类型：期刊文献

中文题名：1961—2023年福建前汛期开汛时间年际变化和成因

英文题名：Interannual Variations and Causes of the Pre-flood SeasonOnset Date in Fujian during 1961 to 2023

作者：江晓南[1];陈俊哲[2];邵颖斌[1];陈玉吉[3]

机构：[1]福建省气象台,福建福州350007;[2]广东海洋大学大气科学系,广东湛江524088;[3]福建省气象服务中心,福建福州350007

年份：2024

卷号：47

期号：2

起止页码：113

中文期刊名：气象与减灾研究

外文期刊名：Meteorology and Disaster Reduction Research

基金：中国气象局决策气象服务专项(编号:JCZX2023006).

语种：中文

中文关键词：前汛期开汛;年际变化;大气环流;海温

外文关键词：pre-flood season onset;interannual variation;atmospheric circulation;sea surface temperature

中文摘要：根据华南汛期监测业务规定,使用相关分析、小波分析、合成分析等统计方法分析了福建1961—2023年前汛期开汛时间的年际变化特征,同时研究了其与福建各地降水量的关系,分析了福建前汛期开汛异常与前冬海温和早春大气环流的关系。结果表明:福建前汛期开汛时间年际变化特征明显,存在25 a的主振荡周期。开汛最早出现在1973年和1979年的4月2日,最晚出现在1963年6月1日,平均开汛时间是4月27日。福建前汛期开汛时间与福建大部春季降水量、中部沿海地区的3月降水量以及福建4月降水量相关较好。福建前汛期开汛偏早年,前冬西北太平洋中部海温偏低,热带中东太平洋东部海温偏高,早春副热带西风急流偏强,副热带高压偏强偏西,南海到福建上空西南气流偏强;开汛偏迟年则完全相反。

外文摘要：According to the South China flood monitoring operation regulations,the interannual variation characteristics of the pre-flood season onset date in Fujian over the past 63 years were analyzed using statistical methods such as correlation analysis,wavelet analysis,and composite analysis.The relationship between the pre-flood season onset date and precipitation in various regions of Fujian was studied,and the anomalies in the pre-flood season onset date in Fujian were discussed in relation to sea surface temperatures in early winter and atmospheric circulation in early spring(March-April).The results showed that the interannual variation characteristics of the pre-flood season onset date in Fujian were significant,with a main oscillation period of 25 years.The earliest onset occurred on April 2 in 1973 and 1979,while the latest onset occurred on June 1 in 1963.The average onset date of the pre-flood season in Fujian from 1961 to 2023 was April 27.The onset date of the pre-flood season in Fujian was well correlated with the spring precipitation in most parts of Fujian,the March precipitation in the central coastal areas,and the April precipitation across the province.In years with early pre-flood season onsets,the sea surface temperature in the central northwest Pacific in the preceding winter was lower,while the sea surface temperature in the eastern tropical Pacific was higher.Additionally,in early spring,the subtropical westerly jet stream was stronger,the subtropical high was stronger and westward-shifted,and the southwest airflow over the South China Sea to Fujian was stronger.Conversely,in years with delayed pre-flood season onsets,the opposite conditions prevailed.