| 冬季北半球大气低频环流型的年际变化特征 |
| |
| 引用本文： | 赵晓栋,孙照渤,倪东鸿,李忠贤.冬季北半球大气低频环流型的年际变化特征[J].气象与减灾研究,2011,34(1):6-15. |
| |
| 作者姓名： | 赵晓栋 孙照渤 倪东鸿 李忠贤 |
| |
| 作者单位： | 1. 南京信息工程大学,气象灾害省部共建教育部重点实验室,江苏,南京,210044;北京华风气象影视信息集团,北京,100081
2. 南京信息工程大学,气象灾害省部共建教育部重点实验室,江苏,南京,210044 |
| |
| 摘 要： | 采用NCEP/NCAR逐日再分析资料,利用31点数字滤波器提取了58个冬季(1951/1952-2008/2009年)的500 hPa高度场低频分量,通过经验正交函数分析方法定义了6种低频环流型.从逐年低频环流型的差异和低频环流型系数两个角度分析低频环流型的年际变化特征;给出了58个冬季的主要低频环流型并分析了逐年低频...
|
| 关 键 词： | 低频环流型 低频环流型系数 年际变化 |
INTERANNUAL AND INTERDECADAL VARIATIONS OF WINTER ATMOSPHERIC LOW FREQUENCY CIRCULATION PATTERNS IN THE NORTHERN HEMISPHERE |
| |
| Zhao Xiaodong,Sun Zhaobo,Ni Donghong,Li Zhongxian.INTERANNUAL AND INTERDECADAL VARIATIONS OF WINTER ATMOSPHERIC LOW FREQUENCY CIRCULATION PATTERNS IN THE NORTHERN HEMISPHERE[J].Meteorology and Disaster Reduction Research,2011,34(1):6-15. |
| |
| Authors: | Zhao Xiaodong Sun Zhaobo Ni Donghong Li Zhongxian |
| |
| Institution: | 1.Key Laboratory of Meteorological Disaster of Ministry of Education,NUIST,Nanjing 210044,China 2.Huafeng Group of Meteorological Audio ＆ Video Information,Beijing 100081,China |
| |
| Abstract: | Based on the daily NCEP/NCAR reanalysis data,the 31-point low-pass filter was used to investigate the variation of atmospheric low frequency of 500 hPa height in winter in the Northern Hemisphere.By using the EOF analysis method,six leading EOF modes are defined six low frequency circulation patterns（LFCP） of 500 hPa geopotential height field.The interannual variation characteristics of LFCP are studied in view of the difference of the annual low frequency circulation and the low frequency circulation pattern index（LFCPI）.The paper presents the main LFCP of 58 winters（1951/1952—2008/2009） and analyses the characteristics of annual LFCP.The results show that the oscillation of Pattern Ⅰ decreases after 1990s,Pattern Ⅱ shows strong positive（negative） 2-years phase,Pattern Ⅲ has obvious interdecadal variation,Pattern Ⅳ behaves strong interannual oscillation between 1970s to 1980s,Pattern Ⅴ turns into negative phase from positive phase in 1980s,and Pattern Ⅵ changes into positive phase from negative phase in the mid-1970s.And the significant periods of LFCP mostly appear before 1990s. |
| |
| Keywords: | Low frequency circulation pattern Low frequency circulation pattern index Interannual variation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
