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    Global oceanic tides, was: Navigating Around Hills and Dips in the Ocean
    From: Trevor Kenchington
    Date: 2003 Aug 15, 22:49 -0300

    George Huxtable wrote, after much snipping:
    > Because of the inertia of the immense water-masses involved, together with
    > the obstruction caused by the continents (which restrict free flow from one
    > ocean basin to another) the ocean surface can't, anywhere near, respond to
    > these forces in the necessary time. Instead, the water swirls and surges
    > around the ocean basins, in a pattern that's so complex that it defies
    > calculation.
    While computationally daunting, in the last ten years, cotidal charts
    for the world ocean have been calculated from the astronomic tide
    generating forces and the shapes of the ocean basins -- charts that seem
    to match quite well with empirical observations.
    Back when I was an oceanography student (nearly 30 years now) it was
    quite impossible. The first realistic tidal model I encountered (for
    part of the Tasman Sea) dated from the mid-1980s. By the mid- to
    late-1990s, it was possible to do the whole ocean.
    Trevor Kenchington
    Trevor J. Kenchington PhD                         Gadus@iStar.ca
    Gadus Associates,                                 Office(902) 889-9250
    R.R.#1, Musquodoboit Harbour,                     Fax   (902) 889-9251
    Nova Scotia  B0J 2L0, CANADA                      Home  (902) 889-3555
                         Science Serving the Fisheries

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