کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1777177 | 1523659 | 2011 | 8 صفحه PDF | دانلود رایگان |
Stratospheric warmings are attributed to an enhanced planetary wave activity, occurring nearly each winter – at least in the northern hemisphere – with different strengths. The generation of stratospheric warmings is not totally understood. One of the most promising explanations is the interaction of planetary waves: in many cases, the amplitude of the quasi-stationary planetary wave 1 builds up, until it transmits its momentum and energy to the background wind field. The role of wave 2 is usually considered to be less important.Based on ERA-40 and DYANA temperature data (January–February 1990), we found evidence that a resonant wave–wave interaction between a travelling and a stationary wave 2 was responsible for a minor stratospheric warming in February 1990. The interaction being observed during four weeks can eventually be used as an indication for an upcoming stratospheric warming.
Research highlights
► Resonant wave–wave interaction (planetary wave no. 2) probably responsible for a minor stratwarm.
► Usage of ERA-40 and DYANA temperature data (January–February 1990).
► Interaction observable during four weeks before the stratospheric warming.
► Eventually usable as an indication for an upcoming event.
Journal: Journal of Atmospheric and Solar-Terrestrial Physics - Volume 73, Issues 7–8, May 2011, Pages 771–778