Re: pinhole tides

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From: pauld@exploratorium.edu
Date: Sun Feb 29 2004 - 22:43:26 PST 

Message-ID: <1952.209.239.173.234.1078123406.squirrel@www.exo.net>
Date: Sun, 29 Feb 2004 22:43:26 -0800 (PST)
Subject: Re: pinhole tides
From: pauld@exploratorium.edu

Hi Treena

The earth does bulge about a meter due to the moon and a hal a meter due
to the sun.

The water can flow, exactly as John Lahr says, and so makes a larger pile
on top of the bulge of the "solid" earth.

Paul D

> Both the solid Earth and the water bulge due to the interaction between
> the Moon and the Earth. The solid Earth tides are much smaller in
> amplitude
> than those of the ocean water because they must overcome the elastic
> rigidity of the Earth. The ocean tides are higher because the water can
> flow laterally and thus respond to the changing gravitational forces.
>
> Cheers,
> John
>
> At 08:54 AM 2/24/2004, you wrote:
>>Hi gang
>>
>>I was wondering if I am correct in my understanding that the tides are
>>caused by the Earth itself bulging in response to the Moon's
>>gravitational pull, rather than the water. My understanding is that the
>>bulging Earth causes the relative water levels to change. confirmation
>>anyone?
>>
>>
>>Treena Joiful
>>
>>
>>____________________________________________________________________
>>
>>
>>
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