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The Vasco Experiment
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The Vasco field experiment is part of the Vasco-Cirene field campaign of January-February 2007 in the Indian Ocean south of the equator.  The Vasco measurements are based on two quasi-Lagrangian instruments:
  • Aeroclippers measuring parameters at the air sea interface 
    • wind, temperature, pressure and humidity in the atmosphere surface layer
    • temperature and salinity at the ocean surface
  • Pressurized balloons measuring atmospheric parameters near the top of the atmospheric boundary layer
    • wind, temperature, pressure and humidity
large scale dynamics
(left) Average circulation, SST and OLR (green) during January over the Indian Ocean
(right) Latitude-Height section of the January zonal wind in the Indian Ocean showing the westerly jet

Pressurized balloons and aeroclipper measurements will serve as a base of validation for the meteorological fields given by ECMWF and that will be used to describe the large-scale environment for the Cirene measurements. The Aeroclipper measurements will be typically used to do the link between the precise Eulerian measurements of Cirene and the large-scale fields given by satellites and by meteorological analyses of ECMWF. These measurements will also give a statistics on the spatial homogeneity of the surface parameters and on their short time and space variability related to the diurnal cycle and to the convective precipitation events, in particular on the surface salinity and temperature and on the turbulent flux perturbations.