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A preliminary discussion on tidal gravity anomalies and terrestrial heat flow in Lanzarote (Canary Islands)

AuthorsArnoso, José ; Fernández Torres, José ; Vieira, Ricardo ; Van Ruymbeke, M.
KeywordsMareas terrestres
Earth tides
Issue Date2000
PublisherInternational Association of Geodesy
CitationMarées terrestres, Bulletin d'informations, 132: 10271-10282 (2000)
AbstractSince 1987, gravity tide observations have been conducted on the island of Lanzarote, with different gravimeters at different locations. Very anomalous values of heat flow data have also been collected in what is known as the Timanfaya National Park, in the southwestern part of the island. Results for gravity tide anomalies, after correction of the indirect oceanic effect using different global ocean models, complemented with regional and local charts, reveals that cosine component of the final residue vector depends on the ocean model considered. For station CV, if we take into account the porosity effects of the lava rock, the final residue goes to values close to or greater than zero. For station T, the values of the cosine component are equally large for 0 1 and M2 tidal waves and of negative sign. Nevertheless, although our result reveals important differences between stations, it cannot be extended for a global gravity residue-heat flow correlation.
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