On the Coupling between Barotropic and Baroclinic Modes of Extratropical Atmospheric Variability
On the Coupling between Barotropic and Baroclinic Modes of Extratropical Atmospheric Variability
复制标题
温带大气变率的正压模式与斜压模式之间的耦合
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
M. Blackburn
中科院分区：
文献类型：
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作者：
Lina Boljka;T. Shepherd;M. Blackburn
大气动力学的斜压和正压分量通常被看作是通过斜压生命周期相互联系的，斜压涡旋增长与热通量有关，正压衰减与动量通量有关，两个涡旋通量通过Eliassen-Palm波活动联系在一起。然而，最近的观测研究表明，这两个组成部分的动力学在很大程度上是解耦的，在纬向平均流的变化主要与动量通量，斜压波活动的变化主要与热通量，基本上没有相关性两者之间。这些关系进行了检查，在不同的配置和南半球的观测，考虑到不同的频带，以考虑不同的时间尺度的大气变率的干动力学核心模式。结果表明，在大于10天的中间周期，斜压和气压的解耦是不稳定的。
AbstractThe baroclinic and barotropic components of atmospheric dynamics are usually viewed as interlinked through the baroclinic life cycle, with baroclinic growth of eddies connected to heat fluxes, barotropic decay connected to momentum fluxes, and the two eddy fluxes connected through the Eliassen-Palm wave activity. However, recent observational studies have suggested that these two components of the dynamics are largely decoupled in their variability, with variations in the zonal mean flow associated mainly with the momentum fluxes, variations in the baroclinic wave activity associated mainly with the heat fluxes, and essentially no correlation between the two. These relationships are examined in a dry dynamical core model under different configurations and in Southern Hemisphere observations, considering different frequency bands to account for the different timescales of atmospheric variability. It is shown that at intermediate periods longer than 10 days the decoupling of the baroclinic and barot...
区域空间尺度上南半球环流的季节内周期性
影响因子：
3.1
作者：
Thompson, David W.;Crow, Brian R.;Barnes, Elizabeth A.
通讯作者：
Barnes, Elizabeth A.