Zonal asymmetry of the Antarctic Oscillation
Zonal asymmetry of the Antarctic Oscillation
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DOI：
10.1029/2006gl028045
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发表时间：
2007-01
影响因子：
5.2
通讯作者：
K. Fan
中科院分区：
文献类型：
--
作者：
K. Fan
本文研究了南环模的纬向不对称性，即南极涛动。结果表明，北半球夏季中高纬度地区、不同经度地区，特别是东半球与西半球的标准化海平面气压差存在明显的纬向不对称性。结果表明，南方涛动（SO）是造成AAO纬向不对称的部分原因。除去南方涛动指数（SOI）线性回归前后，1959-1998年期间AAO西半球和东半球的相关系数分别为0.23和0.52。本文还讨论了去除SO指数（SOI）线性回归前后东亚降水与AAO的关系，表明东亚降水与AAO纬向对称分量之间存在稳定的关系。
In this research, the zonal asymmetry of the southern annular mode, or the Antarctic Oscillation (AAO), is studied. It is indicated that apparent zonal asymmetry exists in the normalized sea level pressure differences between the middle and high latitudes during the boreal summer, among different longitudes, especially between the Western and Eastern Hemispheres. Results show that the Southern Oscillation (SO) is responsible for part of the zonal asymmetry in AAO. The Western Hemisphere and the Eastern Hemisphere parts of AAO are correlated at 0.23 and 0.52 respectively for the period of 1959–1998 before and after the linear regressions on the Southern Oscillation Index (SOI) have been removed from the time series. The paper also discusses the relationship between the precipitation in the East Asia and the AAO before and after removing the linear regressions on SO index (SOI), indicating the stable relationship between the East Asian precipitation and the zonal symmetric component of AAO.