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Ocean Surface Topography from Space
SCIENCE
Comparison of multi-mission altimeter products to in-situ data, Computation of MDT, MSS and Global Ocean Observed Products


Author:

Marie-Hélène Rio - (CLS)

Co-Investigator(s):
  Philippe Schaeffer
Stéphanie Guinehut
Claire Dufau
Sandrine Mulet
Gilles Larnicol
Yannice Faugere
Sylvie Labroue
(CLS)
(CLS)
(CLS)
(CLS)
(CLS)
(CLS)
(CLS)
  Marie-Isabelle Pujol
Nicolas Picot
Laurent Bessieres
Ananda Pascual
Yann Drillet
John Wilkin
(CNES)
(AS+)
(AS+)
(IMEDEA)
(Mercator-Océan)
(IMCS)

Abstract:


Comparison of multi-mission altimeter products to in-situ data, Computation of MDT, MSS and Global Ocean Observed Products
Combination of satellite and in-situ data to observe, monitor and analyze the 3D ocean state
The central objective of this proposition is to quantify the contribution of multiple altimeter data sets and its combination with in-situ for an improved understanding of the variability of the general circulation and climate changes. This includes:
  • The calculation of altimeter Mean Sea Surface
  • The calculation of Mean Dynamic Topography currently used to reference the Sea Level Anomalies. GRACE and GOCE data and additional in-situ observations (temperature and salinity profiles, drifters) will be used to improve previous estimations of MDT both for the global ocean and for specific regions as the Mediterranean Sea
  • The development of a new Absolute Dynamic Topography mapping approach from along-track measurements of altimeter Sea Surface Height (above ellipsoid) minus geoid. The development of along-track altimeter products tailored for assimilation into operational forecasting systems.
  • The development of Global Observed Ocean Products (GOOP) that combine altimeter and in-situ data to produce 3D thermohalin and currents fields.
  • Mesoscale and its role in the ocean circulation variability and climate changes studies will be led from the analysis of merged altimeter data sets and from GOOP. This work will include the comparison with high resolution primitive equation models and the development of ocean indicators.



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