09 Oct 2023
 | 09 Oct 2023
Status: this preprint is currently under review for the journal ESSD.

3D reconstruction of horizontal and vertical quasi-geostrophic currents in the North Atlantic Ocean

Sarah Asdar, Daniele Ciani, and Bruno Buongiorno Nardelli

Abstract. In this paper we introduce a new high-resolution (1/10°) data-driven dataset of 3D ocean currents developed by the National Research Council of Italy in the framework of the European Space Agency World Ocean Circulation project: the WOC-NATL3D dataset. The product domain extends over a wide portion of the North Atlantic Ocean from the surface down to 1500 m depth, and the dataset covers the period between 2010 and 2019. To generate this product, a diabatic quasi-geostrophic diagnostic model is applied to data-driven 3D temperature and salinity fields obtained through a deep learning technique, along with ERA5 fluxes and empirical estimates of the horizontal Ekman currents based on input provided by the European Copernicus Marine Service. The assessment of WOC-NATL3D currents is performed by direct validation of the total horizontal velocities with independent drifter estimates at various depths (0, 15 and 1000 m) and by comparing them with existing reanalyses that are obtained through the assimilation of observations into ocean general circulation numerical models. Our estimates of the ageostrophic components of the flow improve the total horizontal velocity reconstruction, being more accurate and closer-to-observations than model reanalyses in the upper layers, also providing an indirect proof of the reliability of the resulting vertical velocities. The reconstructed WOC-NATL3D currents are freely available at (Buongiorno Nardelli, 2022).

Sarah Asdar et al.

Status: open (until 16 Dec 2023)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'General comment on essd-2023-388', Anonymous Referee #1, 16 Nov 2023 reply

Sarah Asdar et al.

Data sets

North Atlantic Data-Driven 3D Currents, Temperature and Salinity from ESA WOC project. Ver. 2.0 B. Buongiorno Nardelli

Sarah Asdar et al.


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Short summary
Estimating 3D currents is crucial for the understanding of ocean dynamics and a precise knowledge of ocean circulation is essential to ensure a sustainable ocean. In this context, a new high-resolution (1/10°) data-driven dataset of 3D ocean currents has been developed within the European Space Agency World Ocean Circulation project, providing 10 years (2010–2019) of horizontal and vertical quasi-geostrophic currents at daily resolution over the North Atlantic Ocean, down to 1500 m depth.