BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Phase-synchronization of tropical variability in global climate mo
 del simulations of the recent past - Scott Osprey (University of Oxford)
DTSTART:20121015T130000Z
DTEND:20121015T140000Z
UID:TALK40058@talks.cam.ac.uk
CONTACT:Dr Scott Hosking
DESCRIPTION:The quasibiennial oscillation (QBO) and semiannual oscillation
  (SAO) are the dominant modes of variability occuring in the tropical stra
 tosphere. Previous studies have shown that the onset of the westerly phase
  of the QBO is seeded by the descending phase of the SAO. A recent study b
 y Read and Castrejon-Pita (2012) showed evidence for phase-synchronisation
  of the QBO with the SAO. \n\nTimeseries of monthly-mean zonal mean zonal 
 wind are examined in model simulations submitted to the Coupled Model Inte
 rcomparison Project Phase 5 (CMIP5). Twenty-two models were examined for t
 he presence of a\nQBO in the equatorial stratosphere\, of these only 3 dis
 played this behaviour. These models were then tested for phase synchronisa
 tion\; only one model (MPI-ESM-MR) showed behaviour consistent with observ
 ations.
LOCATION:British Antarctic Survey\, conference room
END:VEVENT
END:VCALENDAR