GEOMED2: High-Resolution Geoid of the Mediterranean

R. Barzaghi*, D. Carrion, G. S. Vergos, I. N. Tziavos, V. N. Grigoriadis, D. A. Natsiopoulos, S. Bruinsma, F. Reinquin, L. Seoane, S. Bonvalot, M. F. Lequentrec-Lalancette, C. Salaün, O. Andersen, P. Knudsen, A. Abulaitijiang, M. H. Rio

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

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

Keywords

  • Altimetry
  • Geoid
  • Mean Dynamic Topography
  • Mediterranean Sea

Cite this

Barzaghi, R., Carrion, D., Vergos, G. S., Tziavos, I. N., Grigoriadis, V. N., Natsiopoulos, D. A., ... Rio, M. H. (2019). GEOMED2: High-Resolution Geoid of the Mediterranean. In L. Sánchez, & J. T. Freymueller (Eds.), International Symposium on Advancing Geodesy in a Changing World - Proceedings of the IAG Scientific Assembly, 2017 (pp. 43-49). Springer. International Association of Geodesy Symposia, Vol.. 149 https://doi.org/10.1007/1345_2018_33
Barzaghi, R. ; Carrion, D. ; Vergos, G. S. ; Tziavos, I. N. ; Grigoriadis, V. N. ; Natsiopoulos, D. A. ; Bruinsma, S. ; Reinquin, F. ; Seoane, L. ; Bonvalot, S. ; Lequentrec-Lalancette, M. F. ; Salaün, C. ; Andersen, O. ; Knudsen, P. ; Abulaitijiang, A. ; Rio, M. H. / GEOMED2: High-Resolution Geoid of the Mediterranean. International Symposium on Advancing Geodesy in a Changing World - Proceedings of the IAG Scientific Assembly, 2017. editor / Laura Sánchez ; Jeffrey T. Freymueller. Springer, 2019. pp. 43-49 (International Association of Geodesy Symposia, Vol. 149).
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title = "GEOMED2: High-Resolution Geoid of the Mediterranean",
abstract = "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.",
keywords = "Altimetry, Geoid, Mean Dynamic Topography, Mediterranean Sea",
author = "R. Barzaghi and D. Carrion and Vergos, {G. S.} and Tziavos, {I. N.} and Grigoriadis, {V. N.} and Natsiopoulos, {D. A.} and S. Bruinsma and F. Reinquin and L. Seoane and S. Bonvalot and Lequentrec-Lalancette, {M. F.} and C. Sala{\"u}n and O. Andersen and P. Knudsen and A. Abulaitijiang and Rio, {M. H.}",
year = "2019",
doi = "10.1007/1345_2018_33",
language = "English",
isbn = "9783030129149",
series = "International Association of Geodesy Symposia",
publisher = "Springer",
pages = "43--49",
editor = "Laura S{\'a}nchez and Freymueller, {Jeffrey T.}",
booktitle = "International Symposium on Advancing Geodesy in a Changing World - Proceedings of the IAG Scientific Assembly, 2017",

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Barzaghi, R, Carrion, D, Vergos, GS, Tziavos, IN, Grigoriadis, VN, Natsiopoulos, DA, Bruinsma, S, Reinquin, F, Seoane, L, Bonvalot, S, Lequentrec-Lalancette, MF, Salaün, C, Andersen, O, Knudsen, P, Abulaitijiang, A & Rio, MH 2019, GEOMED2: High-Resolution Geoid of the Mediterranean. in L Sánchez & JT Freymueller (eds), International Symposium on Advancing Geodesy in a Changing World - Proceedings of the IAG Scientific Assembly, 2017. Springer, International Association of Geodesy Symposia, vol. 149, pp. 43-49, International Symposium on Advancing Geodesy in a Changing World, Kobe, Japan, 30/07/2017. https://doi.org/10.1007/1345_2018_33

GEOMED2: High-Resolution Geoid of the Mediterranean. / Barzaghi, R.; Carrion, D.; Vergos, G. S.; Tziavos, I. N.; Grigoriadis, V. N.; Natsiopoulos, D. A.; Bruinsma, S.; Reinquin, F.; Seoane, L.; Bonvalot, S.; Lequentrec-Lalancette, M. F.; Salaün, C.; Andersen, O.; Knudsen, P.; Abulaitijiang, A.; Rio, M. H.

International Symposium on Advancing Geodesy in a Changing World - Proceedings of the IAG Scientific Assembly, 2017. ed. / Laura Sánchez; Jeffrey T. Freymueller. Springer, 2019. p. 43-49 (International Association of Geodesy Symposia, Vol. 149).

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

TY - GEN

T1 - GEOMED2: High-Resolution Geoid of the Mediterranean

AU - Barzaghi, R.

AU - Carrion, D.

AU - Vergos, G. S.

AU - Tziavos, I. N.

AU - Grigoriadis, V. N.

AU - Natsiopoulos, D. A.

AU - Bruinsma, S.

AU - Reinquin, F.

AU - Seoane, L.

AU - Bonvalot, S.

AU - Lequentrec-Lalancette, M. F.

AU - Salaün, C.

AU - Andersen, O.

AU - Knudsen, P.

AU - Abulaitijiang, A.

AU - Rio, M. H.

PY - 2019

Y1 - 2019

N2 - 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.

AB - 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.

KW - Altimetry

KW - Geoid

KW - Mean Dynamic Topography

KW - Mediterranean Sea

U2 - 10.1007/1345_2018_33

DO - 10.1007/1345_2018_33

M3 - Article in proceedings

AN - SCOPUS:85061428537

SN - 9783030129149

T3 - International Association of Geodesy Symposia

SP - 43

EP - 49

BT - International Symposium on Advancing Geodesy in a Changing World - Proceedings of the IAG Scientific Assembly, 2017

A2 - Sánchez, Laura

A2 - Freymueller, Jeffrey T.

PB - Springer

ER -

Barzaghi R, Carrion D, Vergos GS, Tziavos IN, Grigoriadis VN, Natsiopoulos DA et al. GEOMED2: High-Resolution Geoid of the Mediterranean. In Sánchez L, Freymueller JT, editors, International Symposium on Advancing Geodesy in a Changing World - Proceedings of the IAG Scientific Assembly, 2017. Springer. 2019. p. 43-49. (International Association of Geodesy Symposia, Vol. 149). https://doi.org/10.1007/1345_2018_33