Christine ProvostLODYC, UPMC,
T14 2E, 4 place Jussieu,
75252 Paris Cedex 05
Phone: 33-1-44274555, fax: 33-1-44273805,
Experienced Marine Scientist with particular interest in studies on physical oceanography analysing in situ observations, satellite observations and model produced data. C. Provost is responsible of the Confluence project of the WOCE program (World Ocean Circulation Experiment) and has considerable experience in the collection of sea-truth data. C. Provost is a TOPEX-POSEIDON PI. She is experienced with the use of satellite data, mainly altimetric and infrared imagery (new methods for satellite data analysis). She also works in the field of instrumentation development and presently coordinates an EC funded MAST-3 technological project: YOYO 2001 ocean odyssey (April 1998 - March 2001).
Maamaatuaiahutaipu K., Garçon V., Provost C., Mercier H.,1998: Transports of the Brazil and Malvinas Currents at their Confluence., J. Geophys. Res., 56, 2, pp. 417-438
Escoffier C. and C. Provost, 1998: Surface forcing over the Southwest Atlantic from NCEP and ECMWF reanalyses on the period 1979-1990. Phys. and Chem. of the Earth, 23, pp. 7-8 .
Provost C., C. Escoffier, K. Maamaatuaiahutaipu, A. Kartavsteff and V. Garçon: The Subtropical Mode Waters in the South Atlantic Ocean. en révison.
Provost C. and M. du Chaffaut, 1998: Moored yoyo profiler: an autonomous multisensor. Oceanology 98. Proceedings of the Brighton meeting. Vol.1, pp 243-250
Vigan X., C. Provost, and R. Bleck: Sea surface velocities from SST sequences: part 1: method and validation using MICOM outputs. J. Geophys. Res. (en révision)
Vigan X., C. Provost and G. Podesta: Sea surface velocities from SST sequences. Part II: application to the Brazil-Malvinas Confluence region. J. Geophys. Res. (en revision).
Vivier F. et C. Provost: Volume Transport of the Malvinas Current: Can the flow be monitored by TOPEX/Poseidon? JGR-Oceans, (en révision).
Role in the SMOS mission:
She will participate to CAL VAL activities and be an end-user of the system. The main objectives are: CAL-VAL of SSS in 2 regions of high SSS contrasts and variability.
The in situ measurements will provide high frequency measurements in real time, and, besides calval activities will permit to estimate the aliasing due to SMOS time sampling.
- Influence of sea roughness on SSS retrieval.
- Representiveness of retrieved satellite SSS with respect to the water column
Two sites of opportunity are proposed for CALVAL : one in the Brazil-Malvinas Confluence region and one in the Agulhas-Benguela convergence region (those sites will also be used for ENVISAT and JASON CALVAL).A surface mooring will be deployed at each site. This surface mooring comprises a surface buoy equipped with meteorological sensors, accelerometers, pressure sensors and real time transmission to land. Below the buoy is a taut cable on which an autonomous vehicle the yoyo profiler " makes repeated high accuracy CTD profiles from 1000m up to the surface ( CTD = temperature + conductivity + depth). At the end of a profile the yoyo transmits all the data acquired to the surface buoy which sends it to shore. (All this equipment is being developed and tested within a european MAST programme called "yoyo 2001 ocean odyssey").
Therefore we shall obtain in real time CTD thus salinity (surface and subsurface from yoyo profiler), wind and wave height (from the buoy).
The ship cruises to be used for the deployments are:
- for the Brazil-Malvinas Area : the Bristish Antarctic Survey ship which performs the Atlantic Meridional Transect (AMT from the PML, UK) twice a year. Cooperation with J. Aiken & D. Robbins from PML.
- for the Benguela/Agulhas region: a regular cruise from Cape Town to Prince Edwards Islands once a year in April. Cooperation with Lutjeharms, M. Rouault from Cape Town University.