The stratosphere: a review of the dynamics and variability

被引:31
作者
Butchart, Neal [1 ]
机构
[1] Met Off Hadley Ctr MOHC, Exeter EX1 3PB, England
来源
WEATHER AND CLIMATE DYNAMICS | 2022年 / 3卷 / 04期
关键词
QUASI-BIENNIAL OSCILLATION; GENERAL-CIRCULATION MODEL; WELL-RESOLVED STRATOSPHERE; MADDEN-JULIAN OSCILLATION; CONVECTIVE GRAVITY-WAVES; QBO-LIKE OSCILLATION; POLAR-NIGHT VORTEX; MIDDLE ATMOSPHERE; INTERANNUAL VARIABILITY; NORTHERN-HEMISPHERE;
D O I
10.5194/wcd-3-1237-2022
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
Large-scale, intra-seasonal to inter-annual variability of the stratosphere is reviewed. Much of the variability is dynamical and induced by waves emanating from the troposphere. It is largely characterized by fluctuations in the strength of the polar vortex in winter and a quasi-biennial oscillation in the equatorial winds. Existing theories for the variability are generally formulated in terms of wave-mean-flow interactions, with refinements due, in part, to teleconnections between the tropics and extratropics. Climate and seasonal forecast models are able to reproduce much of the observed polar stratospheric variability and are increasingly successful in the tropics too. Compared to the troposphere the models display longer predictability timescales for variations within the stratosphere. Despite containing just similar to 17 % of the atmosphere's mass, the stratosphere's variability exerts a powerful downward influence on the troposphere that can affect surface extremes. The stratosphere is therefore a useful source of additional skill for surface predictions. However, a complete dynamical explanation for the downward coupling is yet to be established.
引用
收藏
页码:1237 / 1272
页数:36
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