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Title

Reconstruction of ocean currents at scales shorter than 30 km from existing satellite observations

AuthorsIsern-Fontanet, Jordi ; Martín-Puig, Cristina; Turiel, Antonio ; González-Haro, Cristina ; Turiel, Antonio ; García-Ladona, Emilio
Issue Date10-May-2016
PublisherEuropean Space Agency
CitationLiving Planet Symposium 2016
AbstractAlong-track altimetric measurements of Sea Surface Heights (SSH) are very well suited to quantify across-track currents, but the spatial resolution of the derived 2D velocities from conventional altimeters is restricted to scales above 100-150 km with the added limitation that some regions have limited number of available altimeters which lead to errors in the location of currents. Infrared measurements of Sea Surface Temperature (SST) are well suited to locate flow patterns, but the extraction of quantitative estimations of ocean currents from SSH data is complex. To overcome these constrains we have developed a methodology to exploit the synergy between SST and SSH measurements to provide enhanced 2D surface currents. Our approach combines the usage of advanced signal processing techniques, such as wavelet analysis, with dynamical approaches like the Surface Quasi-Geostrophic (SQG) equations. This approach allows for the derivation of the velocity field associated to structures smaller than 30 km, not accesible through the standard SSH maps. Here we will show some examples of the capabilities of our technique for the better characterization of small scale dynamics by comparing the performance of existing satellite information with in situ experiments. Moreover, we will compare the results achieved from conventional altimetry versus those derived from SAR altimetry as offered by the CryoSat-2 mission and the forthcoming Sentinel-3A
Description2016 European Space Agency (ESA) Living Planet Symposium, 9-13 May 2016, Prague, Czech Republic
Publisher version (URL)http://lps16.esa.int/page_paper0823.php
URIhttp://hdl.handle.net/10261/161926
Appears in Collections:(ICM) Comunicaciones congresos
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