热带地理 ›› 2020, Vol. 40 ›› Issue (4): 752-764.doi: 10.13284/j.cnki.rddl.003254
• 论文 • 上一篇
收稿日期:
2019-09-16
修回日期:
2020-05-20
出版日期:
2020-07-31
发布日期:
2020-08-11
通讯作者:
李江南
E-mail:dongxh7@mail2.sysu.edu.cn;essljn@mail.sysu.edu.cn
作者简介:
董雪晗(1996—),女,河南漯河人,硕士研究生,主要从事暴雨的研究,(E-mail)基金资助:
Xuehan Dong1(), Jiangnan Li1(
), Zixi Ruan1, Yerong Feng2
Received:
2019-09-16
Revised:
2020-05-20
Online:
2020-07-31
Published:
2020-08-11
Contact:
Jiangnan Li
E-mail:dongxh7@mail2.sysu.edu.cn;essljn@mail.sysu.edu.cn
摘要:
2018-08-27—09-01广东发生了一次持续性特大暴雨过程,被列为广东省2018年十大天气事件之一。文章综合利用欧洲中期天气预报中心(ECMWF)全球再分析资料ERA-Interim、广东省加密自动站观测资料、中国地面累年值日值数据集(1981—2010年)、NOAA日平均和长期平均向外长波辐射数据,采用小波分析、带通滤波、回归分析等方法,对此次暴雨过程进行分析,主要探讨低纬大气准双周振荡对此次持续性暴雨过程的影响。结果表明:此次暴雨持续时间长、影响范围大,影响此次暴雨天气过程的主要天气系统为季风低压,并伴随有切变线和低空急流;季风低压减弱西移后,与南海西北部高压共同作用,广东沿海极端降水达到最强。2018年7—9月广东省降水和向外长波辐射OLR有显著的6~13 d振荡特征,同时受低纬西北太平洋对流振荡和热带北印度洋对流振荡的影响。低频振荡自西太平洋地区,向西北方向传播,引起了华南沿海的低频对流与环流的发展;来自热带北印度洋上的气流经由孟加拉湾、中南半岛到达华南沿海地区,形成了低频振荡的垂直环流圈,有利于水汽输送及对流发展。两者叠加,影响了此次持续性暴雨的发生发展。
中图分类号:
董雪晗, 李江南, 阮子夕, 冯业荣. 低纬准双周振荡对2018年8月广东持续性特大暴雨过程的影响[J]. 热带地理, 2020, 40(4): 752-764.
Xuehan Dong, Jiangnan Li, Zixi Ruan, Yerong Feng. Influence of Low-Latitude Quasi-Biweekly Oscillation on a Persistent Heavy Rainfall Event in August 2018 in Guangdong Province[J]. Tropical Geography, 2020, 40(4): 752-764.
表1
近10年受大气振荡影响的持续性强降水过程个例
发生时间 | 发生地区 | 持续 时长/d | 参考文献 | 发生时间 | 发生地区 | 持续 时长/d | 参考文献 |
---|---|---|---|---|---|---|---|
2010-06-17—25 | 江淮流域 | 9 | 吴建金(2016) | 2011-10-04—08 | 海南 | 5 | Li Jiangnan(2017) |
2010-07-15—17 | 四川盆地 | 3 | 黄瑶(2019) | 2013-03-26—30 | 华南地区 | 5 | 胡娅敏(2014) |
2010-09-30—10-09 | 海南 | 10 | 简茂球(2013) | 2013-05-19—22 | 华南地区 | 4 | 胡娅敏(2014) |
2010-10-13—18 | 海南 | 6 | Li Jiangnan(2017) | 2013-06-19—21 | 四川盆地 | 3 | 黄瑶(2019) |
2011-06-27—30 | 广东 | 4 | 纪忠萍(2014) | 2013-07-08—11 | 四川盆地 | 4 | 黄瑶(2019) |
2011-07-11—19 | 广东 | 9 | 纪忠萍(2014) | 2014-08-07—09 | 四川盆地 | 3 | 黄瑶(2019) |
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