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

气象与环境学报 ›› 2013, Vol. 29 ›› Issue (3): 35-41.doi:

• 论文 • 上一篇    下一篇

中国东北地区中尺度对流复合体的时空分布特征

方丽娟1 于学泉1 王元2 王承伟3 王永波3 陈莉1   

  1. 1.哈尔滨市气象局，黑龙江 哈尔滨 150028；2.南京大学，江苏 南京 210093；3.黑龙江省公共气象服务中心，黑龙江 哈尔滨 150036
  • 出版日期:2013-06-29 发布日期:2013-06-29

Spatial and temporal distribution of mesoscale convective complex in Northeast China

FANG Li-juan1 YU Xue-quan1 WANG Yuan2 WANG Cheng-wei3 WANG Yong-bo1 CHEN li1
   

  1. 1. Harbin Meteorological Service, Harbin 150080, China; 2. Nanjing University, Nanjing 210006, China; 3. Service Center of Public Meteorology in Heilongjiang Province, Harbin 150036, China
  • Online:2013-06-29 Published:2013-06-29

PDF (PC)

471

被引次数

4

摘要： 普查2005年5月1日至2008年9月30日FY-2C每隔30 min一次的红外云图，根据修正的MCC（Mesoscale Convective Complexes）标准，统计分析中国东北地区出现的MCC变化。结果表明：4 a共出现了22个MCC，其中19个出现在7—8月；东北地区MCC生成源地有明显的地域特点，MCC的生成与大兴安岭的地形密切相关，而辽宁和吉林东部极少生成MCC。中国东北地区MCC平均生命史为9.3 h，比美洲及中国南方地区都短，而≤-52℃和≤-32℃冷云罩面积明显大于以上两个区域；东北地区具有明显的夜发性特征，近85 %的MCC生成于午后到傍晚，15—24时是MCC对流最旺盛的时段。

关键词: 东北地区, 中尺度对流复合体, 生命史, 生成源地, 夜发性

Abstract:  A census survey was done using the FY-2C infrared cloud imageries with once every 30 minutes interval from May 1, 2005 to September 30, 2008. The variations of the mesoscale convective complex (MCC) in Northeast China were analyzed based on the amended MCC standards. The results show that there are 22 MCCs during the census survey in Northeast China and 19 of them appear in July or August. The source region of MCCs is of the significantly regional characters, and the generation of MCC is related to the terrains of Daxinganling mountain, while few MCCs are found in Liaoning province and the east of Jilin province. The average life time is 9.3 hours in the Northeast China which is shorter than that in America and the South China, while the scales under -52 ℃ or under -32 ℃ in the Northeast China are all greater than that in the above two regions. The nocturnalism of MCCs is significant in the Northeast China. Among them, 85 % of MCCs generates during afternoon to evening, and its convective frequent period is from 15:00 to 24:00.

Key words: Northeast China, Mesoscale convective complex (MCC), Life cycle, Source region, Nocturnalism