欧亚秋季雪盖与北半球冬季大气环流的联系

doi:10.11821/xb200707006

地理学报 ›› 2007, Vol. 62 ›› Issue (7): 728-741.doi: 10.11821/xb200707006

欧亚秋季雪盖与北半球冬季大气环流的联系

张天宇^1,2, 陈海山², 孙照渤²

1. 重庆市气候中心, 重庆401147;
2. 南京信息工程大学江苏省气象灾害重点实验室, 南京210044

收稿日期:2007-04-10 修回日期:2007-05-20 出版日期:2007-07-25 发布日期:2007-07-25
作者简介:张天宇(1982-), 男, 贵州赤水人, 硕士。主要从事短期气候预测与海气相互作用研究。 E-mail: zhangtianyu821227@hotmail.com
基金资助:
江苏省气象灾害重点实验室项目(KLME050205); 国家自然科学基金项目（40405018） ; 国家自然科学基金项目(40331010)

The Relationship between Autumn- time Eur asian Snow Cover and Winter - time NH Cir culation

ZHANG Tianyu^1,2, CHEN Haishan², SUN Zhaobo²

1. Chongqing Climate Center, Chongqing 401147, China;
2. Jiangsu Key Laboratory of Meteorological Disaster, Nanjing University of Information Science & Technology, Nanjing 210044, China

Received:2007-04-10 Revised:2007-05-20 Online:2007-07-25 Published:2007-07-25
Supported by:
Project of Jiangsu Key Laboratory of Meteorological Disaster No.KLME050205; National Natural Science Foundation of China.No.40405018; No.40331010

摘要/Abstract

摘要：

利用NOAA 提供的1973-2004 年32 年欧亚雪盖面积资料和NCEP/NCAR 再分析资料, 采用相关和合成方法对比分析了欧亚秋、冬季雪盖与北半球冬季大气环流的关系,得到了一个观测事实: 欧亚秋季雪盖与后期冬季北半球中高纬大气环流存在显著的相关关系, 尤其是与北半球冬季大气环流的最主要模态北极涛动(AO) 或北大西洋涛动(NAO) 呈显著的负相关关系, 而且欧亚秋季雪盖面积与后期冬季北半球大气环流的关系比欧亚冬季雪盖与同期大气环流的关系更好。最后提出了一个联系欧亚秋季雪盖与冬季大气环流的可能原因: 欧亚秋季雪盖异常可能是导致后期冬季北半球大气环流变化的一个主要强迫因子。

关键词: 欧亚雪盖, 冬季大气环流, 北极涛动, 北大西洋涛动, 西伯利亚高压

Abstract:

The relationship between the autumn-time and winter-time Eurasian snow cover anomalies and the distributions of winter-time NH circulation has been investigated by using comparative analysis of the correlation and synthetic methods based on the data of the snow cover in Eurasia from NOAA and reanalyzed data from NCEP/NCAR for the period 1973 through 2004, and the results show an observational fact: there is a significant correlation between the Eurasian autumn snow cover and the high-latitude atmospheric circulation of late winter in Northern Hemisphere. Especially it shows an obvious negative correlation between the Eurasian autumn snow cover and the main model Arctic Oscillation (AO), or the North Atlantic Oscillation (NAO) of the winter-time NH circulation. The relationship between the autumn-time snow cover anomalies and the following winter-time circulation is closer than that between the winter-time snow cover anomalies and the winter-time circulation based on observational analysis. Finally, a link between the Eurasian autumn snow cover and the winter-time NH circulation is mentioned. The Eurasian autumn snow cover may be a major factor which forces the variability of the following winter-time NH circulation.

Key words: Eurasian snow cover, Northern Atmospheric Circulation, Arctic Oscillation

张天宇, 陈海山, 孙照渤. 欧亚秋季雪盖与北半球冬季大气环流的联系[J]. 地理学报, 2007, 62(7): 728-741.

ZHANG Tianyu, CHEN Haishan, SUN Zhaobo. The Relationship between Autumn- time Eur asian Snow Cover and Winter - time NH Cir culation[J]. Acta Geographica Sinica, 2007, 62(7): 728-741.

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欧亚秋季雪盖与北半球冬季大气环流的联系

The Relationship between Autumn- time Eur asian Snow Cover and Winter - time NH Cir culation

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