Experimental altimetry products ocean (M)SLA, (M)ADT with finer resolution - Sea Surface Heights and Currents - delayed-time - (multimissions - levels 3-4)

Multimission altimeter products "Experimental" with a finer resolution in preparation to the SWOT Era with sea surface heights computed with respect to a twenty-year mean and Geostrophic velocities, resulting from specific processes, available in delayed time. Use: regional studies, ocean variability (mesoscale circulation,...), Regional products are :

• along-track Sea Level Anomalies (SLA, level-3), for the North Atlantic, Agulhas current areas from Jason-3, Jason-2, Saral/AltiKa, Cryosat-2 and Sentinel-3A measurements and between 2014/12 and 2017/04, depends on the mission. This Level-3 along-track product is delivered with a 5Hz (i.e. nearly 1km) sampling.
• gridded Sea Level Heights dedicated to Arctic Ocean (EASE2 grid definition),
• gridded Sea Level Heights (MSLA, MADT, level-4) and geostrophic velocities computed with Dynamic Interpolation (1/8°x1/8° and 1/4°x1/4° on cartesian grid), over the Gulf Stream, Udinstev
• gridded Sea Level Anomalies (MSLA, level-4) and geostrophic velocities combining altimetry and drifters (1/4°x1/4° on a cartesian grid), over the Gulf of Mexico

The global product contents:

• the gridded optimally merged velocities (level-4) combining altimetry and SST (1/4°x1/4° on a cartesian grid). Note that this gridded products combining altimetry and SST have been calculated in the framework of three different projects: 1/ a Marie-Curie Fellowship cofunded by the European Union under the FP7-PEOPLE-Cofunding of Regional, National and International Programmes Grant Agreement 600407 and the RITMARE FLAG project (2014-2016), 2/ the ESA Globcurrent project (2014-2018), 3/ the DUACS-MR CNES project (2016-2018).

References for gridded computed with Dynamic Interpolation:

• Ubelmann, C., P. Klein, and L.-L. Fu, 2015: Dynamic interpolation of sea surface height and potential applications for future high-resolution altimetry mapping. J. Atmos. Oceanic Technol., 32, 177–184, doi:10.1175/JTECH-D-14-00152.1.
• Ubelmann C., B. Cornuelle and L-L Fu, 2016: Dynamic Mapping of Along-Track Ocean Altimetry: Method and Performance from Observing System Simulation Experiments. J. Atmos. Oceanic Technol., doi:10.1175/JTECH-D-15-0163.1
• Rogé, M., Morrow R., Ubelmann C. and G. Dibarboure, 2017 : Using a dynamical advection to reconstruct a part of the SSH evolution in the context of SWOT, application to the Mediterranean Sea. Ocean Dynamics, 67-8, 1047–1066
• Ubelmann C., M. Ballarotta, Y. Faugere, M. Rogé, R. Morrow, G. Dibarboure, Upcoming high-resolution regional products of Sea Level Anomaly from Dynamic Interpolation, OSTS 2017

References for gridded combining altimetry and drifters:

• Synergetic use of surface drifters and altimetry to increase resolution and accuracy of maps of sea level anomaly in the Gulf of Mexico, Mulet et al, OSTST 2017

References for gridded combining altimetry and SST:

• Rio, M-H, R. Santoleri, R. Bourdalle-Badie, A. Griffa, L. Piterbarg, G. Taburet, 2016: Improving the altimeter derived surface currents using high-resolution Sea Surface Temperature data: A feasibility study based on model outputs. Journal of Atmospheric and Oceanic Technology, Vol. 33, DOI: 10.1175/JTECH-D-16-0017.1.