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The Vasco-Cirene experiment

The Vasco-Cirene experiment. J.Ph. Duvel J. Vialard and R. Molcard LMD-ENS Paris, France LODYC, UPMC, Paris, France Support from CNES, CNRS/INSU, CORIOLIS. Intraseasonal Variation SST-OLR. OLR/NOAA. SST/TMI. Coherent variations of the TMI-SST and the NOAA-OLR

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The Vasco-Cirene experiment

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  1. The Vasco-Cirene experiment J.Ph. Duvel J. Vialard and R. Molcard LMD-ENS Paris, France LODYC, UPMC, Paris, France Support from CNES, CNRS/INSU, CORIOLIS

  2. Intraseasonal Variation SST-OLR OLR/NOAA SST/TMI Coherent variations of the TMI-SST and the NOAA-OLR SST more reactive south of the equator

  3. Argo floats deployment campaigns Argo floats February 2006 Atalante campaign Ocean measurements (CTD, ADCP…) Flux measurements Radiosondes Mooring deployment at 76°E + Sagar Kanya campaign in the east ? Vasco-Cirene calendar 2004 2005 2006 IOP IX06 SOOP line (TSG + XBT) February 2005 First Vasco campaign from Seychelles Islands 5 PBs & 5 Aeroclippers JFM 2006 Intensive Vasco campaign ~ 20 PBs & 20 Aeroclippers Subsurface mooring (ADCP) at 76°E

  4. Argo Floats Deployment Plans Sagar Kanya (August 2004) : 14 floats Marion Dufresne (September - October 2004) : 12 floats For all floats : One profile (0-2000m) of T and S every 10 days At 6°S : High frequency profiles given by three floats lagged by 3 days.

  5. Atalante Cruise Feb 2006 Simultaneous cruise of the Sagar Kanya ? Ocean measurements (XBT, CTD, ADCP) Flux measurements Radiosondes Mooring deployment at 76°E

  6. The Aeroclipper Measurent of surface atmospheric and oceanic parameters Surface turbulent fluxes using bulk formulas

  7. INDOEX-type balloons Example trajectories for balloons 1 and 6 during the INDOEX experiment • Quasi-Lagrangian Measurements of: • Pressure • Temperature • Humidity • In or above the atmospheric boundary layer Comparison with ECMWF Zonal Wind: Large differences !

  8. U Average Wind for January-March NCEP - 1990-1999 Aeroclipper trajectories simulated using ECMWF wind for JFM 1999. Aeroclippers deployed from Seychelles Islands

  9. Summary • Role of air-sea interaction in the ISO • New experimental concept (Lagrangian and Eulerian measurements at the interface) in a region with very few in situ observations. • Experiment open to other international cooperations: • Additional in situ measurements • Satellite data processing • … • Support from CLIVAR expected

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