On the Identification of the Downward Propagation of Arctic Stratospheric Climate Change over Recent Decades

摘要: AbstractDynamical coupling between the stratospheric and tropospheric circumpolar circulations in Arctic has been widely documented on month-to-month interannual time scales, but not longer scales. In Antarctic, both short- long-term extending from stratosphere to surface identified. this study, changes temperature, geopotential height, ozone observed since satellite era began 1979 are examined, comparing dynamically quiescent years which major sudden warmings did occur all years. It is shown that approach clarifies behavior for without marked by a strengthening of polar vortex over past 30 The associated declines temperatures, qualitatively similar those obtained Antarctic (albeit weaker), propagate downward into lowermost durin...