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Validation of high and super resolution ocean dynamics products

J. Sudre 1, 2 Hussein Yahia 3 Oriol Pont 3 Claire Pottier 4 C. Maes 1 Veronique Garcon 1, 2 
LEGOS - Laboratoire d'études en Géophysique et océanographie spatiales
CNES - Centre National d'Études Spatiales [Toulouse]
Abstract : In this work we present the validation of two products showing ocean dynamics at high resolution. The first one is calculated from a combination of geostrophic currents derived from satellite absolute dynamic topography, and blended wind driven currents following the methodology proposed by Sudre et al. (2013) [1]. The second ocean dynamics product at super resolution (1/24°) is established on an approximation of the energy cascade, expressed in a microcanonical formulation, and associated to turbulent signal provided by SST MODIS-Aqua product at 1/24° [2]. The basic idea is to use optimal cascading to decrease the spatial resolution of SST MODIS-Aqua product at 1/24°, then use the motion information available at lower resolution coming from the first product just described , transmit that information along the scales back to higher spatial resolution using the cascade to obtain a 1/24° resolution motion field [3]. These two products are validated with drifters drogued at 15-m depth from the Global Drifter Program at AOML and other in-situ currents products. [1]J. Sudre, C. Maes, and V. Garçon, 2013, On the global estimates of geostrophic and Ekman surface currents, Limnology and Oceanography: Fluids and Environments, vol. 3, pp. 1-20, DOI 10.1215/21573689-2071927. [2]H. Yahia, J. Sudre, C. Pottier and V. Garçon, 2010, Motion analysis in oceanographic satellite images using multiscale methods and the energy cascade, Pattern Recognition, DOI: 10.1016/J.patcog.2010.04.011. [3]J. Sudre, H. Yahia, V. Garçon, O. Pont, and C. Pottier, Ocean turbulent dynamics at super resolution: A true picture, in prep.
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Submitted on : Friday, April 12, 2013 - 7:16:05 PM
Last modification on : Wednesday, November 16, 2022 - 11:46:08 AM


  • HAL Id : hal-00812833, version 1


J. Sudre, Hussein Yahia, Oriol Pont, Claire Pottier, C. Maes, et al.. Validation of high and super resolution ocean dynamics products. Ocean Surface Currents: Towards Future Mission Concepts, European Spatial Agency, Apr 2013, Space Research and Technology Centre of the European Space Agency (ESA/ESTEC), located 35km south-we, Netherlands. ⟨hal-00812833⟩



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