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气象:2019,45(9):1238-1247
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2010—2016年江西省暖季短时强降水特征分析
付超,谌芸,朱克云,单九生,曾智琳
(成都信息工程大学大气科学学院,成都 610225; 国家气象中心,北京 100081; 江西省气象台,南昌 330096; 福建省气象台,福州 350000)
Characteristics of Flash Heavy Rain in Jiangxi Warm Season from 2010 to 2016
FU Chao,CHEN Yun,ZHU Keyun,SHAN Jiusheng,ZENG Zhilin
(Chengdu University of Information Technology, College of Atmospheric Sciences, Chengdu 610225; National Meteorological Centre, Beijing 100081; Jiangxi Meteorological Observatory, Nanchang 330096; Fujian Meteorological Observatory, Fuzhou 350000)
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投稿时间:2018-06-24    修订日期:2019-04-03
中文摘要: 利用江西省2010—2016年5—9月1597个观测站逐小时降水资料对江西省短时强降水进行统计分析。采用REOF将降水场划分为5个区域:赣北南部(Ⅰ区),抚州市及赣州中部(Ⅱ区),赣北北部(Ⅲ区),赣南南部、北部(Ⅳ区)以及赣中西部(Ⅴ区)。短时强降水高频区主要分布在山地及河谷附近,分别为湘赣交界罗霄山脉东侧、武夷山西侧、信江河谷、乐安河谷和昌江河谷。河谷附近短时强降水频次以昌江河谷最高(16.9次/a),山地附近最高在罗霄山脉东侧(12.6次/a),极端短时强降水分别位于上饶市东北部山区(3.7次/a)及九岭山南侧的锦江河谷(3.3次/a)。短时强降水主要发生在5月第3候,6、7月第3~4候以及8月第2~3候。Ⅳ、Ⅴ区具有单峰型的日变化特征;Ⅰ、Ⅱ、Ⅲ区具有双峰型的日变化特征。主峰基本集中在下午17时;次峰在上午08—10时。短时强降水对暴雨贡献率基本在40%以上,Ⅰ、Ⅱ区的暴雨天气过程将近一半是由短时强降水贡献的。信江河谷是暴雨雨量中心,但并不是短时强降水雨量中心;昌江河谷与武夷山西麓既是暴雨中心也是短时强降水中心。
Abstract:Statistical analysis of flash heavy rain in Jiangxi warm season from 2010 to 2016 is conducted based on hourly precipitation data from 1597 automatic weather stations. The precipitation field is divided into five regions by REOF: south part of northern Jiangxi (Region Ⅰ), Fuzhou and central Ganzhou (Region Ⅱ), northern Jiangxi (Region Ⅲ), southern and northern Ganzhou (Region Ⅳ), and western of central Jiangxi (Region Ⅴ). The high frequency areas of flash heavy rain are mainly distributed near mountains and river valleys. They are the eastern side of the Luoxiao Mountain, the western foot of Wuyi Mountain, the Xinjiang, the Le’an and the Changjiang River valleys. The frequency of flash heavy rain near the river valley is the highest in the Changjiang River valley (16.9 times one year), the highest near the mountains is the east side of the Luoxiao Mountain (12.6 times one year). The extreme flash heavy rain areas are located in the mountain areas of Northeast Shangrao (3.7 times one year) and the Jinjiang River valley (3.3 times one year). Flash heavy rain mainly occurred in the 3rd pentad of May, middle of June and July, and from 2nd to 3rd pentads of August. The diurnal variation characteristics of Regions Ⅳ and Ⅴ are single peak types, diurnal variation characteristics of Regions Ⅰ, Ⅱ and Ⅲ are bimodal patterns. The main peaks are concentrated at 17:00 BT in the afternoon; the second peak is during 08:00-10:00 BT in the morning. The contribution rate of flash heavy rain to rainstorm is basically above 40%, nearly half of the rainstorm weather processes in Regions Ⅰ and Ⅱ are contributed by flash heavy rain. The Xinjiang River valley is the center of rainstorm rainfall, but not the center of flash heavy rain rainfall. However, the Changjiang River valley and the western foot of Wuyi Mountain are both the centers of rainstorm rainfall and the flash heavy rain rainfall.
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基金项目:国家自然科学基金项目(41975001,41175048)和国家重点研发计划(2017YFC1502501)共同资助
引用文本:
付超,谌芸,朱克云,单九生,曾智琳,2019.2010—2016年江西省暖季短时强降水特征分析[J].气象,45(9):1238-1247.
FU Chao,CHEN Yun,ZHU Keyun,SHAN Jiusheng,ZENG Zhilin,2019.Characteristics of Flash Heavy Rain in Jiangxi Warm Season from 2010 to 2016[J].Meteor Mon,45(9):1238-1247.