Combined effects of QBO and 11‐year solar cycle on the winter hemisphere in a stratosphere‐troposphere coupled system
Combined effects of QBO and 11‐year solar cycle on the winter hemisphere in a stratosphere‐troposphere coupled system
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DOI：
10.1029/2008gl037117
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发表时间：
2009-06
影响因子：
5.2
通讯作者：
Kosuke Ito;Y. Naito;S. Yoden
中科院分区：
文献类型：
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作者：
Kosuke Ito;Y. Naito;S. Yoden
利用平流层-对流层耦合系统的理想化机械环流模型研究了准两年期振荡（QBO）和11年太阳周期（SC）对冬半球的综合影响。施加纬向动量强迫来模拟 QBO 的西风相或东风相，并在平流层顶周围引入与 SC 相关的加热异常。进行了 39,600 天的一系列长时间积分，以获得这些实验参数的 46 种组合的统计显着结果。所获得的极地平流层温度响应对 QBO 和 SC 组合的依赖性与观测到的响应定性一致。在 QBO 西风运行的许多情况下，冬季极地平流层太阳最大相位和最小相位之间的差异非常显着，超过 95% 的置信水平。然而，与 QBO 效应相比，SC 效应相对较小。
Combined effects of the quasi‐biennial oscillation (QBO) and the 11‐year solar cycle (SC) on the winter hemisphere are investigated with an idealized mechanistic circulation model of a stratosphere‐troposphere coupled system. A zonal momentum forcing is imposed to mimic a westerly or easterly phase of the QBO and a heating anomaly associated with the SC is introduced around the stratopause. A series of long time integrations of 39,600 days are performed to obtain statistically significant results for forty‐six combinations of these experimental parameters. The obtained dependence of the temperature response in the polar stratosphere on the combination of QBO and SC are qualitatively consistent with the observed responses. The difference in the winter polar stratosphere between the solar maximum and minimum phase is highly significant at above the 95% confidence level in many cases of the QBO westerly runs. The SC effect is, however, relatively small compared to the QBO effect.