文章基本信息

标题：Interdecadal and Interannnual Variabilities of the Antarctic Oscillation Simulated by CAM3
本地全文：下载
作者：Xue Feng ; Sun Dan ; Zhou Tian-Jun 等
期刊名称：Atmospheric and Oceanic Science Letters
印刷版ISSN：1674-2834
电子版ISSN：2376-6123
出版年度：2014
卷号：7
期号：6
页码：515-520
DOI：10.3878/AOSL20140036
语种：English
出版社：Taylor and Francis Ltd
摘要：Based on four sets of numerical simulations prescribed with atmospheric radiative forcing and sea surface temperature (SST) forcing in the Community Atmospheric Model version 3 (CAM3), the interannual and interdecadal variabilities of the Antarctic oscillation (AAO) during austral summer were studied. It was found that the interannual variability is mainly driven by SST forcing. On the other hand, atmospheric radiative forcing plays a major role in the interdecadal variability. A cooling trend was found in the high latitudes of the Southern Hemisphere (SH) when atmospheric radiative forcing was specified in the model. This cooling trend tended to enhance the temperature gradient between the mid and high latitudes in the SH, inducing a transition of the AAO from a negative to a positive phase on the interdecadal timescale. The cooling trend was also partly weakened by the SST forcing, leading to a better simulation compared with the purely atmospheric radiative forcing run. Therefore, SST forcing cannot be ignored, although it is not as important as atmospheric radiative forcing.
关键词：Antarctic oscillation; interannual variability; interdecadal variability