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中国夏季东北冷涡强度的定量化分析

杨涵洧 封国林 沈柏竹 支蓉

杨涵洧, 封国林, 沈柏竹, 支蓉. 中国夏季东北冷涡强度的定量化分析[J]. 大气科学, 2012, 36(3): 487-494. doi: 10.3878/j.issn.1006-9895.2011.11071
引用本文: 杨涵洧, 封国林, 沈柏竹, 支蓉. 中国夏季东北冷涡强度的定量化分析[J]. 大气科学, 2012, 36(3): 487-494. doi: 10.3878/j.issn.1006-9895.2011.11071
YANG Hanwei, FENG Guolin, SHEN Baizhu, ZHI Rong. The Quantitative Research on Cold Vortex in Summer over Northeast China[J]. Chinese Journal of Atmospheric Sciences, 2012, 36(3): 487-494. doi: 10.3878/j.issn.1006-9895.2011.11071
Citation: YANG Hanwei, FENG Guolin, SHEN Baizhu, ZHI Rong. The Quantitative Research on Cold Vortex in Summer over Northeast China[J]. Chinese Journal of Atmospheric Sciences, 2012, 36(3): 487-494. doi: 10.3878/j.issn.1006-9895.2011.11071

中国夏季东北冷涡强度的定量化分析

doi: 10.3878/j.issn.1006-9895.2011.11071
基金项目: 国家自然科学基金资助项目40930952、41105055, 公益性行业科研专项GYHY201106016、GYHY201106015, 国家科技支撑计划项目2007BAC29B01、2009BAC51B04

The Quantitative Research on Cold Vortex in Summer over Northeast China

  • 摘要: 本文利用NCEP/NCAR发布的1981~2010年全球日平均再分析位势高度场资料对东北冷涡进行检索并提取其平均态, 在此基础上定义东北冷涡的偏离指数, 并探讨其对东北冷涡强度特征的描述。结果表明: (1) 东北冷涡500 hPa闭合中心位势高度的概率分布近似为高斯分布, 以其期望值提取的东北冷涡平均态具有东北冷涡的共性, 表现出明显的大气斜压性及有利于系统维持和发展的温压配置关系特征; (2) 基于东北冷涡平均态定义的东北冷涡偏离指数不仅能够表征东北冷涡偏离平均态的程度, 还包含了低压面积的信息, 即能够直观地显示东北冷涡的强弱特征。
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出版历程
  • 收稿日期:  2011-04-10
  • 修回日期:  2012-02-06

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