GEOMED2: High-Resolution Geoid of the Mediterranean

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedings – Annual report year: 2019Researchpeer-review

DOI

  • Author: Barzaghi, R

    Politecnico di Milano, Italy

  • Author: Carrion, Daniela

    Politecnico di Milano, Italy

  • Author: Vergos, George S.

    Aristotle University of Thessaloniki, Greece

  • Author: Tziavos, Ilias N.

    Aristotle University of Thessaloniki, Greece

  • Author: Grigoriadis, V. N.

    Aristotle University of Thessaloniki, Greece

  • Author: Natsiopoulos, D. A.

    Aristotle University of Thessaloniki, Greece

  • Author: Bruinsma, Sean

    CNES Centre National d'Etudes Spatiales, France

  • Author: Reinquin, F.

    CNES Centre National d'Etudes Spatiales, France

  • Author: Seoane, L.

    Géosciences Environnement Toulouse, France

  • Author: Bonvalot, Sylvain

    Géosciences Environnement Toulouse, France

  • Author: Lequentrec-Lalancette, Marie-Françoise

    French Hydrographic Office, France

  • Author: Salaun , C.

    French Hydrographic Office, France

  • Author: Andersen, O.

    Geodesy, National Space Institute, Technical University of Denmark, Elektrovej, 2800, Kgs. Lyngby, Denmark

  • Author: Knudsen, P.

    Geodesy, National Space Institute, Technical University of Denmark, Elektrovej, 2800, Kgs. Lyngby, Denmark

  • Author: Abulaitijiang, A.

    Geodesy, National Space Institute, Technical University of Denmark, Elektrovej, 2800, Kgs. Lyngby, Denmark

  • Author: Rio, M. -H.

    CNES Centre National d'Etudes Spatiales, France

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Geoid models for the Mediterranean were computed using the remove-compute-restore method and Stokes-FFT, using shipborne gravity or altimetry inferred gravity data over sea and land gravity data. The remove step over sea does not include residual terrain correction (bathymetry), which leads to slightly worse results. The models were compared to an independent geoid constructed by subtracting the Mean Dynamic Topography from the Mean Sea Surface, and secondly to drifter-observed current speeds. Results revealed significant errors in the gravimetric geoid at smallest scales, and analysis of the results of this intermediate model showed that improvement is required in the gravity data preprocessing, specifically the de-biasing of marine data, as well as the gridding (interpolation) procedure. These issues will be addressed before the release of the final geoid model early 2018. Based on the drifter comparisons, the geoid based on altimeter data is the most accurate, more accurate than EIGEN6C4, and notably so at scales less than 50 km.

Original languageEnglish
Title of host publicationInternational Symposium on Advancing Geodesy in a Changing World - Proceedings of the IAG Scientific Assembly, 2017
EditorsLaura Sánchez, Jeffrey T. Freymueller
PublisherSpringer
Publication date2019
Pages43-49
ISBN (Print)9783030129149
DOIs
Publication statusPublished - 2019
EventInternational Symposium on Advancing Geodesy in a Changing World - Kobe, Japan
Duration: 30 Jul 20174 Aug 2017

Conference

ConferenceInternational Symposium on Advancing Geodesy in a Changing World
CountryJapan
CityKobe
Period30/07/201704/08/2017
SeriesInternational Association of Geodesy Symposia
Volume149
ISSN0939-9585
CitationsWeb of Science® Times Cited: No match on DOI

    Research areas

  • Altimetry, Geoid, Mean Dynamic Topography, Mediterranean Sea

ID: 184219764