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 (6): 19-26.doi: 10.3969/j.issn.1673-503X.2016.06.003

• 论文 • 上一篇    下一篇

非绝热加热对6月东北冷涡形成演变的影响及其可能机制

李永生1, 刘伯奇2, 王莹3, 李菲4   

  1. 1. 黑龙江省气候中心, 黑龙江 哈尔滨 150030;
    2. 中国气象科学研究院, 北京 100081;
    3. 黑龙江省气象服务中心, 黑龙江 哈尔滨 150036;
    4. 中国人民解放军空军97647部队气象台, 福建 福州 350026
  • 收稿日期:2015-09-18 修回日期:2016-01-28 出版日期:2016-12-31 发布日期:2016-12-31
  • 通讯作者: 刘伯奇,E-mail:bqliu@camscma.cn。 E-mail:bqliu@camscma.cn
  • 作者简介:李永生,男,1984年生,高级工程师,主要从事短期气候预测和气候诊断研究,E-mail:liyongsheng330@163.com。
  • 基金资助:
    国家重点基础研究发展计划项目(2015CB453202)、国家自然科学基金(41505049)、中国气象科学研究院基本科研业务费专项(2015z001)和黑龙江省气象局科技研究项目(HQ2015027)共同资助。

Effect and possible mechanism of diabatic heating on evolution of cold vortex over Northeast China in June

LI Yong-sheng1, LIU Bo-qi2, WANG Ying3, LI Fei4   

  1. 1. Heilongjiang Climate Center, Harbin 150030, China;
    2. Chinese Academy of Meteorological Sciences, Beijing 100081, China;
    3. Heilongjiang Public Meteorological Service Center, Harbin 150036, China;
    4 97647 Troops of People's Liberation Army, Fuzhou 350026, China
  • Received:2015-09-18 Revised:2016-01-28 Online:2016-12-31 Published:2016-12-31

摘要: 利用ERA-Interim再分析资料,基于等熵位涡理论,采用合成分析和动力诊断方法分析了6月东北冷涡演变过程的气候特征,探究非绝热加热对东北冷涡形成和演变的重要影响。结果表明:气候平均东北冷涡形成在中纬度对流层高层,其形成过程表现为等熵位涡“自上而下、自西向东”发展加强,其演变过程与大气非绝热加热的变化密切联系。在东北冷涡形成前,其上空的非绝热加热明显加强;而在东北冷涡形成后,局地对流层中下部非绝热加热迅速发展。可见,东亚中纬度地区的高空非绝热加热是东北冷涡形成和发展的重要因素,而东北地区对流层中部的非绝热加热则是东北冷涡减弱消亡的主要原因。

关键词: 东北冷涡, 气候特征, 非绝热加热, 等熵位涡

Abstract: Based on the ERA-Interim reanalysis data and the theory of isentropic potential vorticity (IPV) and using methods of composite technology and dynamical diagnosis,climatic characteristics of cold vortexes over Northeast China in June as well as the important effects of diabatic heating on their formation and evolution were analyzed.The results show that climatic mean cold vortex over Northeast China forms in the upper troposphere at the middle latitudes,characterized by IPV strengthening from upward to downward and from the west to the east,which is closely related to variation of the atmospheric diabatic heating.Before cold vortex forms,diabatic heating at the upper levels is evidently strengthened,while as it forms,the local diabatic heating in the middle and lower troposphere rapidly enhances.Consequently,diabatic heating in the upper troposphere greatly determines the formation and development of cold vortex over Northeast China,and diabatic heating in the middle troposphere is the major reason to the delay of cold vortex over Northeast China.

Key words: Cold vortex over Northeast China, Climatic characteristics, Diabatic heating, Isentropic potential vorticity

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