主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

气象与环境学报 ›› 2016, Vol. 32 ›› Issue (5): 40-46.doi: 10.3969/j.issn.1673-503X.2016.05.006

• 论文 • 上一篇    下一篇

辽宁地区大暴雨环境场和物理量场合成分析

孙欣, 陈传雷, 梁寒, 杨青, 贺慧, 陆井龙, 赵明   

  1. 沈阳中心气象台, 辽宁 沈阳 110166
  • 收稿日期:2015-12-25 修回日期:2016-06-02 出版日期:2016-10-31 发布日期:2016-10-31
  • 作者简介:孙欣,女,1961年生,正研级高级工程师,主要从事短期天气及暴雨预报研究,E-mail:sunxin7983@163.com。
  • 基金资助:
    中国气象局预报员专项(CMAYBY2015015)和中国气象局预报预测核心业务发展专项(CMAHX20160103)共同资助。

Composite analysis of environmental and physical quantity fields of heavy rainstorm in Liaoning province

SUN Xin, CHEN Chuan-lei, LIANG Han, YANG Qing, HE Hui, LU Jing-long, ZHAO Ming   

  1. Shenyang Central Meteorological Observatory, Shenyang 110166, China
  • Received:2015-12-25 Revised:2016-06-02 Online:2016-10-31 Published:2016-10-31

摘要: 利用1960-2013年辽宁省61个国家气象站地面降水观测资料和NCEP再分析资料,选取60次区域性大暴雨过程,采用天气学和物理诊断方法对暴雨发生过程中多个时次的环境场与物理量场进行了合成分析。结果表明:辽宁地区大暴雨天气是极地、西风带、副热带及热带系统相互作用的结果,低层冷式切变线带动极地冷空气从偏北路径入侵辽宁地区,西风带短波槽东移使低空急流加强,诱发地面辐合线锋生触发辽宁地区大暴雨。辽宁地区大暴雨的落区、强度与低空急流和冷暖空气的路径、强度密切相关;水汽条件和热力条件是产生强降水的基础,动力抬升条件是降水强度的决定因素。环境场和物理量场的合成分析揭示了辽宁地区大暴雨的共性,可为辽宁地区大暴雨预报提供参考。

关键词: 大暴雨, 环境场, 物理量场, 合成分析, 影响系统

Abstract: Based on data from 61 national observation stations from 1960 to 2013 and NCEP (National Centers for Environmental Prediction) reanalysis data,the environmental and physical quantity fields of a rainstorm at multiple time periods in Liaoning province were synthetically analyzed using synoptic meteorology and physical diagnosis methods.Sixty regional heavy rainstorm processes were selected in this study.The results show that the heavy rainstorms in Liaoning province are controlled by the interacting results among polar,westerlies,subtropic and tropic systems.The cold polar air that is entrained by cold shear lines at low layer invades Liaoning province from a more northerly path.A low-level jet is strengthened by the eastward movement of the westerly shortwave trough.It makes the ground convergence line form a front and at last triggers a heavy regional rainstorm.The falling area and strength of heavy rainstorm in Liaoning province are related to the paths and strengths of the low-level jet and cold and warm air.The moisture and thermal conditions are the bases for the generation of a heavy rainstorm.The dynamic uplifting condition is a determining factor for the intensity of precipitation.It proves that the composite analysis of environmental and physical quantity fields can reveal the common issue in the heavy rainstorm in Liaoning province.It expects that this work could provide a useful reference for forecasting heavy rainstorm in Liaoning province in the future.

Key words: Heavy rainstorm, Environmental field, Physical quantity field, Composite analysis, Influence System

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