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Subject:
Oceanography
Category: Science > Earth Sciences Asked by: want2learn-ga List Price: $5.00 |
Posted:
30 Mar 2004 11:57 PST
Expires: 29 Apr 2004 12:57 PDT Question ID: 322516 |
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There is no answer at this time. |
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Subject:
Re: Oceanography
From: pugwashjw-ga on 02 Apr 2004 07:00 PST |
As a retired skipper, but not university trained, my experience is that wind generated waves are a surface action only and only extend from trough to crest. But such waves, as in a storm, can accumulate and build to a swell whjich can become independent of wind and be effective right to the bottom. I have experienced swells crossing waters sixty feet deep and breaking like surf on days when there was no wind. These swells were on the Australian west coast, direct from Africa and outside the reef line. B....Awsome. |
Subject:
Re: Oceanography
From: racecar-ga on 03 Apr 2004 00:16 PST |
If the current is geostrophic, meaning it flows perpendicular to the pressure gradient force, which is balanced by the Coriolis force, then you can determine the velocity as a function of depth if you know the velocity at some reference depth, and you know the density of the water as a function of depth and horizontal position. But you need to measure salinity as well as temperature to get density. Currents deep in the ocean are generally geostrophic, but currents which are directly driven by the wind are not. The region in which wind stress is important is known as the Ekman layer, and its depth depends, among other things, on latitude and eddy diffusivity. |
Subject:
Re: Oceanography
From: want2learn-ga on 14 Apr 2004 11:24 PDT |
Thank you racecar. Your comment was very helpful. |
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