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SUMMARY:Stratosphere-troposphere coupling - Steven Hardiman\, DAMTP
DTSTART:20060206T130000Z
DTEND:20060206T140000Z
UID:TALK4646@talks.cam.ac.uk
CONTACT:Paul Metcalfe
DESCRIPTION:Earth's atmosphere is divided in the vertical.  People are awa
 re that the troposphere (0-10km) affects the stratosphere (10-50km) but ha
 ve only recently begun to accept that the stratosphere also influences the
  troposphere. Although there is now lots of evidence that the stratosphere
  affects the troposphere\, the mechanisms for this influence are not well 
 understood. I suggest one mechanism for the downward propagation of a dist
 urbance from the stratosphere to the troposphere noting the sensitivity of
  the amount of downward propagation seen to the magnitude of the applied d
 isturbance and the stratospheric response to tropospheric wave forcing.  I
 f this mechanism is important then I argue that a well resolved stratosphe
 re is crucial to accurately simulate the affect that wave breaking or sola
 r heating in the stratosphere will have on the troposphere.\n\nI will also
  briefly discuss the effect that ENSO (sea surface temperatures in the tro
 pics) has on the variability of the tropical lower stratosphere\, arguing 
 that the mechanism is via remote forcing rather than simply a vertical ext
 ension of forcing on the tropical troposphere.
LOCATION:MR4\, DAMTP
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