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大气科学  2000 

北半球冬季海平面气压场的气候基本态与气候变率特征及其影响的初步研究

DOI: 10.3878/j.issn.1006-9895.2000.06.07

Keywords: 气候基本态,气候变率,海平面气压场

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Abstract:

研究了近100多年冬季北半球海平面气压场的气候基本态、气候变率的特征及时间演变规律。指出北半球冬季海平面气压基本态的标准差的高值区在北太平洋的阿留申低压区、冰岛低压区的西北部及西伯利亚高压区。基本态的第一特征向量表现为弱西伯利亚高压、强北大西洋高压的强纬向环流的特征;第二特征向量表现为弱阿留申低压及强北太平洋高压。研究还指出,阿留申低压区及冰岛低压区在基本态改变的同时,标准差也有长期变化,而且主要表现为近百年中变率线性增大。此外,北半球冬季气温及我国冬季气温的长期变化都与北半球冬季海平面的基本态变化有关。

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