论文

冷空气入侵台风“灿鸿”引发的东北暴雨分析

  • 王承伟 ,
  • 齐铎 ,
  • 徐玥 ,
  • 张礼宝 ,
  • 胡中明 ,
  • 周莹 ,
  • 王庆瑜
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  • 黑龙江省气象台, 哈尔滨 150030;吉林省气象台, 长春 132013;黑龙江省气象服务中心, 哈尔滨 150030

收稿日期: 2016-05-19

  网络出版日期: 2017-10-28

基金资助

科技部公益性行业(气象)科研专项(GYHY202006006)

Analysis of Rainstorm Induced by Interaction between Typhoon Chan-hom (2015) and Cold Air in Northeast China

  • WANG Chengwei ,
  • QI Duo ,
  • XU Yue ,
  • ZHANG Libao ,
  • HU Zhongming ,
  • ZHOU Ying ,
  • WANG Qingyu
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  • Heilongjiang Meteorological Observatory, Harbin 150030, China;Jilin Meteorological Observatory, Changchun 132013, China;Heilongjiang Meteorological Service Centre, Harbin 150030, China

Received date: 2016-05-19

  Online published: 2017-10-28

摘要

利用常规观测资料与NECP再分析资料,对2015年在朝鲜半岛登陆北上9号台风"灿鸿"导致东北东部出现较大范围的暴雨和大暴雨天气进行分析。结果表明,此次降水过程是由减弱变性的台风环流与中高纬度弱冷槽结合发展产生,冷空气从低层进入变性台风北部,在地面上表现为中高纬低压减弱合并到变性台风中,使台风登陆后强度减弱较慢,且北部有所加强,因此在其北部出现较大范围的暴雨、大暴雨;变性台风北侧的低层冷暖平流交汇,导致该区域出现低层辐合、高层辐散和较强的上升运动,是本次降水的动力因子;冷空气从低层进入台风环流,低层为冷平流,高层为暖平流,大气层结相对稳定,因此本次降水过程中对流较弱,以连续性降水为主;本次暴雨水汽来源分为两部分:台风本身携带的大量水汽和日本海的水汽输送,二者为本次暴雨提供充沛的水汽条件;另外,地形在动力作用和水汽输送过程中也起到了重要作用。

本文引用格式

王承伟 , 齐铎 , 徐玥 , 张礼宝 , 胡中明 , 周莹 , 王庆瑜 . 冷空气入侵台风“灿鸿”引发的东北暴雨分析[J]. 高原气象, 2017 , 36(5) : 1257 -1266 . DOI: 10.7522/j.issn.1000-0534.2016.00082

Abstract

Based on conventional observations and the NCEP reanalysis data, the heavy rainfall in eastern part of northeast China caused by typhoon Chan-hom (2015), which made landfall at Korean peninsula and moved northward and then encountered with cold air, was studied in the paper.The results suggested that the rainstorm occurred during the interaction with mid-latitude trough and the circulation of typhoon undergoing extratropical transition process as well as cold air.Meanwhile, the landfalling typhoon weakened slowly due to the merge with mid-latitude low on the surface.The cold air invaded low-level atmosphere in the north of the typhoon and enhanced low-level convergence and high-level divergence, which resulted in strong upward motion as an important heavy precipitation formation dynamical factor and so heavy rainfall therein.The evolution of precipitation indicated the event formed because of long time duration of moderate rainfall, which may related with low-level cold air intrusion, which only enhanced the lifting not the instability in the atmosphere.Water vapor provided for the rainstorm mainly came from the typhoon itself and those transfer from Japan Sea.In addition, the topography also played an important role on the vertical motion and water vapor transfer.

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