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VANIMEDAT Project: Decadal and Interdecadal Sea-Level Variability in the Mediterranean Sea and Northeastern Atlantic Ocean

Ananda Pascual(1), Simon Ruiz(2), Marta Marcos(3), Damià Gomis(1), Sebastià Monserrat(1), Enrique Alvarez-Fanjul(4), Begoña Pérez(4), Marcos García Sotillo(4), Gilles Larnicol(5) and Mikis Tsimplis(3)

(1) IMEDEA (CSIC-UIB), Universitat de les Illes Balears, 07122 Palma de Mallorca, Spain
(2) IMEDEA (CSIC-UIB), C/Miquel Marquès, 21, 07190 Esporles, Spain
(3) NOCS, Empress Dock, SO14 3ZH Southhampton, United Kingdom
(4) Puertos del Estado, Avda. del Partenón, 10, 28042 Madrid, Spain
(5) CLS Space Oceanography Division, Parc technologique du canal, 31520 Ramonville St-Agne, France

Abstract

VANIMEDAT is a 3 year project funded in the last Call for R+D projects of the Spanish National Program. The general objective of the VANIMEDAT project is to study the decadal and interdecadal sea-level variability in the seas surrounding the Iberian peninsula. The project will make use of long tide gauge records, improved altimetric data sets and 44 years (1958-2001) of data derived from the HIPOCAS project (a downscaled re-analysis of meteorological and oceanographic fields). The project has several specific objectives. The first one is to determine the spatial and temporal sea-level variability, devoting special attention to the consistency between coastal and open sea observations. To do this, we take advantage of the complementariness of the data sets: while the altimetry reports the open sea variability with a convenient spatial resolution, tide gauge records mainly correspond to coastal sites and provide the time length requested to study the variability at decadal and interdecadal scales. The second objective is to quantify the contribution, at a regional level, of the different mechanisms that drive sea-level variability. This will be achieved basing mainly on the results of numerical modelling. Namely, we aim at: i) quantifying the effect of atmospheric pressure and wind forcing on sea level from the analysis of sea-level residuals produced by the model HAMSOM. ii) Quantifying the contribution of the steric component from the results produced by a 3D baroclinic model forced by HIPOCAS heat fluxes. The third objective iii) will be to estimate the ocean mass increase as the difference between total sea level and the two contributions previously determined. Results will be compared with data from the GRACE and, hopefully, GOCE gravimetric mission.

 

Workshop poster

Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry