Rossby wave propagation into the tropical stratosphere observed by the High Resolution Doppler Imager

被引:20
作者
Ortland, DA
机构
[1] Space Physics Research Laboratory, Dept. Atmosph., Oceanic/Space Sci., University of Michigan, Ann Arbor, MI
[2] Space Physics Research Laboratory, University of Michigan, Ann Arbor, MI 48109-2143
关键词
D O I
10.1029/97GL02001
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Stratospheric wind observations by the High Resolution Doppler Imager on the Upper Atmosphere Research Satellite show that quasi-stationary Rossby waves propagate into the tropics. Rossby wave breaking and dissipation causes meridional transport and direct deposition of momentum, and has a significant influence on the evolution of the mean tropical winds in the upper stratosphere. Deeper penetration into the tropics occurs when the quasi-biennial oscillation is in its westerly phase above 30 km. During northern winter, subtropical momentum deposition by Rossby waves occurs only in late November through December, while during southern winter this occurs primarily in August and September.
引用
收藏
页码:1999 / 2002
页数:4
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