湖北农业科学 ›› 2020, Vol. 59 ›› Issue (15): 37-43.doi: 10.14088/j.cnki.issn0439-8114.2020.15.007

• 资源·环境 • 上一篇    下一篇

湖南省深秋一次罕见持续性暴雨过程诊断分析

刘红武1,2, 唐林3, 廖春花4, 王青霞1,2, 邓朝平1,2   

  1. 1.湖南省气象台,长沙 410118;
    2.气象防灾减灾湖南省重点实验室,长沙 410006;
    3.湖南省人工影响天气领导小组办公室,长沙 410118;
    4.湖南省气象服务中心,长沙 410118
  • 收稿日期:2020-05-26 出版日期:2020-08-10 发布日期:2020-09-24
  • 通讯作者: 唐 林(1977-),男,高级工程师,主要从事云雾物理与人工影响天气研究,(电子信箱)1420949@qq.com。
  • 作者简介:刘红武(1982-),女,湖南涟源人,高级工程师,主要从事暴雨机理研究,(电话)15084868986(电子信箱)45877780@qq.com。
  • 基金资助:
    中国气象局预报员专项(CMAYBY2020-089); 湖南省科技厅重点领域研发计划项目(2019SK2161); 湖南省业务能力建设项目(NLJS14)

Diagnostic analysis of a rare persistent rainstorm in late autumn in Hunan province

LIU Hong-wu1,2, TANG Lin3, LIAO CHUN-hua4, WANG Qing-xia1,2, DENG Zhao-ping1,2   

  1. 1. Hunan Meteorological Observatory, Changsha 410118, China;
    2. Meteorological Disaster Prevention and Reduction Key Laboratory of Hunan Province, Changsha 410006;
    3. Hunan Provincial Weather Modification Office, Changsha 410118, China;
    4. Hunan Meteorological Service Center, Changsha 410118, China
  • Received:2020-05-26 Online:2020-08-10 Published:2020-09-24

摘要: 利用常规气象观测资料和NCEP 1°×1°再分析资料,对2014年10月27日至11月1日发生在湖南省中北部的一次罕见持续性暴雨天气过程进行了综合分析。结果表明,副高强度及其位置、孟加拉湾低槽活动情况及东高西低形势是引起此次暴雨天气过程的大尺度环流背景;高层辐散、低层辐合及强烈的上升运动为暴雨的发生提供了有力的动力抬升条件;低空西南急流的建立和维持为暴雨的产生提供了充沛的水汽条件。整个强降水过程冷空气活动较弱,暴雨主要发生在西南急流左侧的水汽辐合区。此次深秋暴雨集中发生在2个阶段,第一个阶段发生在东路冷空气影响下的大气层结稳定状态下,持续时间长;第二个阶段则是西路冷空气入侵,是在对流不稳定状态下产生的持续时间短。

关键词: 深秋暴雨, 西南低涡, 高低空急流, 罕见, 湖南省

Abstract: Based on the conventional meteorological observation data and 1 °× 1 ° NCEP reanalysis data, a comprehensive analysis of a rare continuous heavy rain weather process occurred in the central and northern Hunan province from October 27 to November 1 was carried out, 2014. The results showed that the intensity and location of the subtropical high, the activity of the low trough in the Bay of Bengal, and the east-west high-low situation were the large-scale circulation backgrounds that caused the heavy rain process; The high-level divergence, low-level convergence and strong ascending motion provided powerful dynamic lifting conditions for the rainstorm; The establishment and maintenance of the low-level southwest jet provided abundant water vapor conditions for the rainstorm. During the whole heavy rainfall process, the cold air activity was weak, and the rainstorm mainly occured in the water vapor convergence area on the left side of the southwest jet. The heavy rain in late autumn mainly occured in two stages. The first stage was the stable atmospheric stratification under the influence of the cold air from the east road, with a long duration; The second stage was the invasion of the cold air from the west road, with a short duration under the convective instability.

Key words: heavy rain in late autumn, southwest low vortex, high and low jet, uncommon, Hunan province

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