大气科学2012，Vol.36Issue(3)：487-494,8.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
The Quantitative Research on Cold Vortex in Summer over Northeast China
摘要
Abstract
Using daily reanalysis data, released by NCEP/NCAR, about geopotential height from 1981 to 2010 (30 years in total) to retrieve and analyze the cold vortex over Northeast China (CVONC), to extract and analyze the average state of CVONC, the authors define a deviation index on CVONC and discuss its rationality to depict the intensity of CVONC. It shows that: (1) the probability distribution of CVONC's geopotential height of occlusive center at 500 hPa is similar to the Gaussian normal distribution, and the average state of CVONC extracted by the expected value of Gaussian normal distribution hold general characters of CVONC; (2) the definition of deviation index on CVONC based on its average state could represent not only the deflected degree from the average state of CVONC, but also some information about the areas of low pressure, which means that it could indicate the intensity characteristics of CVONC directly.关键词
东北冷涡/平均态/强度/东北冷涡偏离指数Key words
cold vortex/average state/intensity/deviation index分类
天文与地球科学引用本文复制引用
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):487-494,8.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 （）
