Electronic Resource
Correlation between sea surface topography and bathymetry in shallow shelf waters in the Western Mediterranean
| العنوان: | Correlation between sea surface topography and bathymetry in shallow shelf waters in the Western Mediterranean |
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| المؤلفون: | Rodríguez Velasco, Gema, Sevilla de Lerma, Miguel Jesús |
| بيانات النشر: | Blackwell 2023-06-20T17:11:26Z 2023-06-20T17:11:26Z 2002 |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | In this paper, gravimetric and altimetric data are used to assess an estimation of the sea surface topography in the Western Mediterranean Sea. This is a complex area from different points of view, due to the presence of several islands, coastal lines, shallow waters and a peculiar hydrologic equilibrium due to its proximity to the Atlantic water exchange area. First, a gravimetric geoid was computed using the least-squares collocation (LSC) procedure with the classical remove-restore technique. We also present a local mean sea surface generated from repeat ERS-1 altimeter data fitted to TOPEX. We chose this satellite because it offers a better spatial resolution than the TOPEX data. The time span used in the computations is one year. This is a useful interval for averaging out the regular seasonal variations, which are very large in this area. We present the comparisons between the gravimetric geoidal heights and the adjusted sea surface. This is a way to obtain a rough estimation of the sea surface topography (SST) since we also include the errors in the two surfaces and other oceanic signals. The differences obtained are physically reasonable with a mean of 17 cm and standard deviation (s.d.) of 39 cm. A significant similarity is observed between the features reproduced by these differences and the bathymetry in the area, suggesting some sort of correlation between both magnitudes for the studied region. If we accept such correlation, the SST may be described as a function of depth. This procedure lets us filter out the short wavelength part of the geoid from the first SST estimation. CLS Space Oceanography Division, Toulouse ERS-1, ERS-2 TOPEX/Poseidon altimetry data for oceanic circulation studies Unidad Deptal. de Astronomía y Geodesia Fac. de Ciencias Matemáticas TRUE pub |
| مصطلحات الفهرس: | 531.51, Circulation, altimetry, ERS-1, geoid, LSC, satellite geodesy, sea surface topography, Geofísica, 2507 Geofísica, journal article |
| URL: | Project AMB99-1015-C02-01 of CICYT |
| الاتاحة: | Open access content. Open access content open access |
| ملاحظة: | application/pdf 0956-540X English |
| Other Numbers: | ESRCM oai:docta.ucm.es:20.500.14352/57916 Arabelos, D. & Tziavos, I.N., 1996. Combination of ERS-1 and TOPEX altimetry for precise geoid and gravity recovery in the Mediterranean Sea, Geophys. J. Int., 125, 285–302. Astraldi, M. & Gasparini, G.P., 1992. The seasonal characteristics of the circulation in the North Mediterranean basin and their relationship with the atmospheric climatic conditions, J. geophys. Res., 97, 9531–9540. AVISO/Altimetry, 1996. Aviso User Handbook for Corrected Sea Surface Heights Altimeter Products, 2nd ed, AVI-NT-011-311-CN. Basu, S., Gairola, R.M. & Pandey, P.C., 1990. Collinear track analysis of Geosat Altimeter Data fort detecting seamounts in the Arabian Sea, Marine Geodesy, 14, 121–135. Beckers, J.M., Brasseur, P.&Nihoul, J.C.J., 1997. Circulation of theWestern Mediterranean: from global to regional scales, Deep Sea Research II, Vol. 44, 3– 4, 531–549. Canals, M. et al., 1997. Transfer of matter and energy in European continental margins, in Interdisciplinary research in the Mediterranean Sea, pp. 31–68, ed. Lipiatou, E., A synthesis of scientific results from the Mediterranean targeted project (MTP) Phase T (1993–96). EUR. 17787 EN. ISSN:1018-5593. Eanes, R.J. & Bettadpur, S.V., 1994. Ocean tides from two years of TOPEX/Poseidon altimetry, EOS, Trans, AGU, 75, 61. Fosberg, R., 1984. A study of terrain reductions, density anomalies and geophysical inversion methods in gravity field modelling, Dept. of Geodetic Science and Surveying Report, no. 355, OSU, Columbus, Ohio. García Asensio, L., Lumbreras, J.J., Martín, G. & Heras, C., 1992. La Altimetría en el SIG del IGN.Modelos digitales de Terreno, Nota Técnica de Geodesia, NIG5. IGN. Madrid. Heck, B. & Rummel, R., 1989. Strategies for solving the vertical datum problem using terrestrial and satellite geodetic data, in Sea Surface Topography and the Geoid. International Association of Geodesy Symposia, 104, 116–128, Springer-Verlag. Hipkin, R., 2000. Modelling the geoid and sea-surface topography in coastal areas, Phys. Chem. Ear 0956-540X 1413950294 |
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| رقم الانضمام: | edsoai.on1413950294 |
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