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SUMMARY:Tropical Western Pacific Currents and the Origin of Intraseasonal 
 Variability Below the Thermocline - Pierre Dutrieux\, BAS
DTSTART:20091014T100000Z
DTEND:20091014T110000Z
UID:TALK19748@talks.cam.ac.uk
CONTACT:Zhaomin Wang
DESCRIPTION:The tropical western Pacific has been the subject of increasin
 g attention during the past two decades. Tropical western Pacific currents
  influence the heat budget of the warm pool\, and thereby play a role in t
 he El Nino-Southern Oscillation (ENSO) phenomenon. They also provide water
 s for the Indonesian Throughflow\, a component of the global thermohaline 
 circulation. Despite these motivations\, direct current observations have 
 been limited to a few quasi-synoptic shipboard acoustic Doppler current pr
 ofiler (SADCP) surveys and moorings concentrated in localized areas along 
 the western boundary. These snapshots and point measurements do not provid
 e a reliable\, comprehensive description and quantification of the mean fl
 ows and their seasonal variability\, let alone their year-to-year fluctuat
 ions. \nThe numerical simulations of this domain are therefore poorly cons
 trained. Our state of knowledge is especially reduced below 300 m\, which 
 until recently was the typical depth range of most SADCPs.\nThe few observ
 ations we have indicate the presence of intense intraseasonal variability 
 at intermediate depth in the western Pacific in general\, and along the we
 stern boundary in particular. But these observations are inadequate to exp
 lore the dynamics of the variability.\nThe present work uses a combination
  of direct current observations and high resolution state of the art ocean
  simulations to provide a detailed description of the currents and to iden
 tify the sources of intraseasonal variability at the western boundary.\n
LOCATION:British Antarctic Survey\, Room 330B
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