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Stratospheric “wave hole” and interannual variations of the stratospheric circulation in late winter


Using the monthly mean NCEP dataset, the analysis of the upward and downward propagation of planetary waves was conducted by means of the three-dimensional Eliassen-Palm (EP) fluxes in the stratosphere. It is shown that the upward/downward EP fluxes are observed in different regions of the atmosphere: their well- known upward propagation takes place over North Eurasia, while the downward one revealed over North Atlantic and Canada in a region of the so-called stratospheric “wave hole”. Generation of the downward wave signal may be associated with a reflection of planetary waves in the upper stratosphere. It is shown that the downward EP flux responsible for the sink of eddy energy from the stratosphere to the troposphere is important in late winter (January-February) for an understanding of the stra- tosphere-troposphere coupling on the interannual and decadal timescales, in particular the 11-year solar cycle influence on the stratosphere. Results presented can explain the unusual beha......

【作者名称】: Evgeny A. Jadin
【关 键 词】: Stratosphere, Planetary Wave Fluxes
【网站名称】: 美国科学研究出版社
【期刊论文数据库】: [DBS_Articles_01]
【期刊论文编号】: 103,355,163
【摘要长度】: 1,000
【栏目名称】: 论文
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