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| Sanchez, Bv; Ray, Rd; Cartwright, De. |
| An empirical model has been derived for the semidiurnal principal lunar tide M2 in the Mediterranean Sea, excluding the Aegean Sea. The work is primarily an exercise in combining satellite altimeter data with tide-gauge data, through the use of specially constructed spatial basis functions. The tide-gauge data consist of M2 harmonic constants previously derived at 43 chosen coastal locations. The altimeter data consist of approximately two years of Geosat data in the form of collinear differences of sea-surface heights, corrected for orbit error by adjusting long sequences of global data. The tide is expressed as an expansion in Proudman functions - numerically constructed, orthogonal eigenfunctions of the velocity potential. The most important mode is... |
| Tipo: Text |
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| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/00100/21166/18785.pdf |
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| Cartwright, De; Ray, Rd. |
| The increasing precision of satellite altimetry in relation to tides justifies making a distinction between the gravitationally generated S-2 tide and its observed values in the ocean, which are affected indirectly by solar radiation. In view of the relatively high noise background, we propose a simplified form of response analysis in which the purely solar semidiurnal harmonics of the gravitational potential are modified by an arbitrary amplitude-factor R* and a phase lag r*. Analysis of a globally representative set of 80 tide-recording stations shows that the observed S-2 constituent is strongly coherent with its gravitational part deduced from lunar tides, with regression constants R* = 0.97, r* = 5.9 degrees. The corresponding 'radiational anomaly has... |
| Tipo: Text |
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| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/00099/21006/18632.pdf |
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