Solar impact on the lower mesospheric subtropical jet: A comparative study with general circulation model simulations
Solar impact on the lower mesospheric subtropical jet: A comparative study with general circulation model simulations
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太阳对中层低层副热带急流的影响：与大气环流模型模拟的比较研究
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
Y. Kuroda
中科院分区：
文献类型：
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作者：
K. Kodera;K. Matthes;K. Shibata;U. Langematz;Y. Kuroda
通过对比观测资料和两个大气环流模式的模拟结果，研究了低层中层副热带急流（LMSJ）的季节和年际变化及其对11年太阳活动周期的依赖性。在模式模拟中，在冬季太阳活动极大期条件下，发现两个半球的LMSJ都有所加强，与观测结果相似。然而，除了南半球的一个案例外，模式响应要小得多。同时还发现，由于太阳强迫的增强，LMSJ的增强出现在年际变化增加的时期之后。分析观察到的季节性游行的LMSJ在每年显示两个不同的制度的行为。为了成功地模拟，模式应该真实地再现观测到的年际变率以及气候平均值。
The seasonal and interannual variation in the lower mesospheric subtropical jet (LMSJ) and their dependence on the 11‐year solar cycle are studied by comparing observational data with simulations by two general circulation models. In the model simulations, a strengthening of the LMSJs is found in both hemispheres during the winter under the solar maximum condition, similar to the observation. However the model responses are substantially smaller except for one case in the southern hemisphere. It is also found that the stronger LMSJ due to an enhanced solar forcing appears during the period which follows an increasing period of interannual variation. Analysis of the observed seasonal march of the LMSJ in each year shows two different regimes of behavior. For a successful simulation, the model should realistically reproduce the observed interannual variability as well as the climatological mean.