What is the role of finescale processes in the vertical exchange in the upper ocean?
The western Mediterranean Sea is a natural reduced-scale laboratory basin for the examination of processes of global importance.
The VERSO (Fine scale [VER]tical exchange in the upper ocean – [S]W[O]T) campaign will take place during the SWOT fast-sampling phase. The general objective of the campaign is to improve the characterization of oceanic mesoscale and submesoscale features (e.g fronts, meanders, eddies and filaments) through the combined use of in-situ multi-platform and satellite data in synergy with numerical models and innovative computational techniques. Gathering a unique multidisciplinary expertise in physical oceanography, satellite remote sensing, in situ monitoring and computational science, we will assess our actual capability to map SSH variability over a range of scales (30-100 km) traditionally not resolved by conventional altimeters.
The approach chosen to achieve the VERSO objective presents several original and innovative elements, related to the methodologies proposed to collect and analyze the physical and biological data. A unique aspect of VERSO is the combination of concurrent multi-scale ship-based, autonomous platform, and satellite observations with ad hoc modeling simulations, enabling the evaluation of underlying mechanisms.
This proposal represents the continuation of the previous SWOT project (MULTI-SUB, PI: Ananda Pascual), but includes several innovative aspects: (1) innovative analysis of in situ data (variational method of interpolation); (2) OSSEs to analyse the sensitivity to synopticity and impacts on vertical velocity; (3) analysis of temporal scales derived from HF radar; (4) estimation of vertical velocities using the semi-geostrophic approximation.
Principal investigators: Ananda Pascual, Evan Mason, Antonio Sánchez-Román, Bàrbara Barceló-Llull (IMEDEA, CSIC-UIB, Spain); Ronan Fablet (IMT-Atlantique, France).
Contact point for the study site: Ananda Pascual (firstname.lastname@example.org).