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气象:2018,44(8):1063-1072
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山东省汛期小时降水过程时空分布特征
董旭光,顾伟宗,邱粲,曹洁
(山东省气候中心, 济南 250031;山东省气象局大气探测技术保障中心,济南 250031)
Spatio Temporal Distribution Characteristics of Hourly Precipitation in Shandong Province in Flood Season
DONG Xuguang,GU Weizong,QIU Can,CAO Jie
(Shandong Climate Centre, Jinan 250031; Atmospheric Sounding and Technical Support Center of Shandong Meteorological Service, Jinan 250031)
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投稿时间:2017-02-07    修订日期:2017-09-19
中文摘要: 利用山东省74个气象站1961—2012年逐时降水观测数据,分析了山东省汛期(5—9月)短历时和持续性降水过程的时空分布特征。结果表明:(1)过程降水量和过程历时显著增大使得山东省汛期总降水量略有增加,持续性降水过程次数、过程降水量、过程历时的增加对总降水量增加的贡献最大。(2)短历时总降水量以鲁中山区、鲁东南地区最多,鲁东南沿海、半岛东部持续性总降水量最多;短历时过程降水量、平均雨强以鲁东南向西北方向经鲁中山区至德州一带最大,持续性过程降水量、平均雨强在半岛东部和鲁东南部分地区最大。(3)短历时峰值雨强以鲁中山区周边地区较大,持续性峰值雨强以鲁南、鲁东南、半岛东部较大。(4)鲁中山区、鲁南及半岛个别地区短历时降水一般开始于午后(13—18时),鲁中山区周边及半岛沿海一带多以夜雨为主,持续性降水过程开始时间多出现在夜间。
Abstract:Based on the hourly precipitation data in Shandong Province during 1961-2012 from 74 weather stations, spatio temporal distribution characteristics of short duration and long duration precipitation events in flood season (May-September) in Shandong are analyzed. The results show that: (1) the increase of process precipitation and process duration makes the total precipitation amount in Shandong in flood season increase slightly. The frequency of continuous precipitation processes, the increase of process precipitation, and the increase of process duration make the greatest contribution to the increase of total precipitation. (2) The total precipitation of short duration is the most in the mountain areas of the central and southeast parts of Shandong while the persistent total precipitation is the most in the southeast coast of Shandong and the eastern part of the peninsula. The short duration precipitation and the average rainfall intensity are the largest from southeast Shandong to Dezhou region, and, in contrast, the sustained rainfall and the average rainfall intensity are the largest in the eastern part of the peninsula and the southeast part of Shandong. (3) The short duration rain intensity peak is greater in the surrounding areas of the mountain area in central Shandong, and the sustained rain intensity peak is higher in the southern and southeastern parts of Shandong as well as the eastern part of the peninsula. (4) The short duration precipitation in the mountain area of central and southern parts of Shandong and some places of the peninsula generally occur from 13:00 BT to 18:00 BT in the afternoon. Around the mountain area in central Shandong and the coastal area of the peninsula, it rains mostly at night and also the beginning time of the continuous precipitation appears at night mostly.
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基金项目:国家自然科学基金项目(41275073)和山东省气象局科研项目(2015sdqxm05、2016sdqxz02)共同资助
引用文本:
董旭光,顾伟宗,邱粲,曹洁,2018.山东省汛期小时降水过程时空分布特征[J].气象,44(8):1063-1072.
DONG Xuguang,GU Weizong,QIU Can,CAO Jie,2018.Spatio Temporal Distribution Characteristics of Hourly Precipitation in Shandong Province in Flood Season[J].Meteor Mon,44(8):1063-1072.