NARVAL FOR EUROSEA

This NARVAL (North Atlantic Regional VALidation) web tool has been developed within the frame of EuroSea project

In particular, under the umbrella of task 3.6 (High Frequency -HF- radars) in the Work Package 3: Network Integration and Improvement

The main aim of this website is to showcase a 6-month (January-June 2023) proof-of-concept demostration of how HF radars can be useful for the skill assessment of operational ocean models

To this purpose, modelled surface currents are validated (on a monthly basis) against remote-sensed currents provided by 7 HF radar systems deployed around the Iberian Peninsula and the Canary islands
The regional ocean models here employed are:
- In the Western Mediterranean Sea: WMOP and MED, the latter run within the context of the Copernicus Marine Service
- In the North-Eastern Atlantic Ocean: GLOBAL and IBI, both operationally run within the context of the Copernicus Marine Service

The main goal of this 6-month (January-June 2023) pilot study is to qualitatively identify, from an Eulerian perspective, the strengths and shortcomings of diverse ocean forecast models running operationally in overlapping regions of the NE Atlantic Ocean and the westernmost Mediterranean Sea

In order to conduct monthly comparisons of model versus HFR datasets, model outputs were bilinearly interpolated on the finer resolution HF radar grid mesh

Additionally, WMOP model surface outputs were temporaly interpolated from 3-hourly to hourly data to ensure the consistency of this comparison exercise

Since HFR remote-sensed estimations are commonly affected by inherent uncertainties (inteferences, etc.), only those HFR grid points with GDOP (Geometric Dilution of Precision) values below 3 and temporal coverage above the 50% (for the selected time period) were analysed

The approach described by GODAE initiative has been adopted: CLASS-4 (maps) and CLASS-2 (timeseries at selected locations) metrics were computed, encompassing mean absolute differences (MAD), correlacion coefficients and currents roses

Seccion destinada a la validacion de la prediccion de oleaje de Puertos del Estado

Las predicciones son comparadas con observaciones in situ proporcionados por boyas

Variables analizadas: altura significante, periodo (medio y de pico) y direccion del oleaje

Validacion de los ultimos 30 dias de prediccion

Validacion a escala mensual, estacional y anual