Show simple item record

dc.contributor.authorBarth, Alexander
dc.contributor.authorTroupin, Charles
dc.contributor.authorReyes, Emma
dc.contributor.authorAlvera-Azcarate, Aida
dc.contributor.authorBeckers, Jean-Marie
dc.contributor.authorTintore, Joaquın
dc.coverage.spatialIbiza Channelen_US
dc.identifier.citationBarth, A., Troupin, C., Reyes, E., et al. (2021) Variational interpolation of high-frequency radar surface currents using DIVAnd. Ocean Dynamics 71, pp.293–308. DOI:
dc.description.abstractDIVAnd (Data-Interpolating Variational Analysis, in n-dimensions) is a tool to interpolate observations on a regular grid using the variational inverse method. We have extended DIVAnd to include additional dynamic constraints relevant to surface currents, including imposing a zero normal velocity at the coastline, imposing a low horizontal divergence of the surface currents, temporal coherence and simplified dynamics based on the Coriolis force, and the possibility of including a surface pressure gradient. The impact of these constraints is evaluated by cross-validation using the HF (high-frequency) radar surface current observations in the Ibiza Channel from the Balearic Islands Coastal Ocean Observing and Forecasting System (SOCIB). A small fraction of the radial current observations are set aside to validate the velocity reconstruction. The remaining radial currents from the two radar sites are combined to derive total surface currents using DIVAnd and then compared to the cross-validation dataset and to drifter observations. The benefit of the dynamic constraints is shown relative to a variational interpolation without these dynamical constraints. The best results were obtained using the Coriolis force and the surface pressure gradient as a constraint which are able to improve the reconstruction from the Open-boundary Modal Analysis, a quite commonly used method to interpolate HF radar observations, once multiple time instances are considered together.en_US
dc.rightsAttribution 4.0 International*
dc.subject.otherHF radaren_US
dc.subject.otherDynamic constraintsen_US
dc.subject.otherData-interpolating variational analysisen_US
dc.titleVariational interpolation of high-frequency radar surface currents using DIVAnd.en_US
dc.typeJournal Contributionen_US
dc.subject.dmProcessesData analysisen_US
dc.bibliographicCitation.titleOcean Dynamicsen_US
dc.description.eovSurface currentsen_US
dc.description.adoptionValidated (tested by third parties)en_US
dc.description.methodologyTypeReports with methodological relevanceen_US Barth

Files in this item


This item appears in the following Collection(s)

Show simple item record

Attribution 4.0 International
Except where otherwise noted, this item's license is described as Attribution 4.0 International