Received: from opus.hpl.hp.com (opus-fddi.hpl.hp.com) by jr.hpl.hp.com with ESMTP (1.37.109.24/15.5+ECS 3.3+HPL1.1) id AA053454422; Thu, 24 Sep 1998 15:00:26 -0700 Return-Path: <bbense@telemark.stanford.edu-DeleteThis> Received: from hplms26.hpl.hp.com by opus.hpl.hp.com with ESMTP (1.37.109.24/15.5+ECS 3.3+HPL1.1) id AA035664412; Thu, 24 Sep 1998 15:00:12 -0700 Received: from telemark.stanford.edu (telemark.Stanford.EDU [171.64.12.100]) by hplms26.hpl.hp.com (8.8.6/8.8.6 HPLabs Relay) with ESMTP id PAA25646 for <wind_talk@opus.hpl.hp.com-DeleteThis>; Thu, 24 Sep 1998 15:00:11 -0700 (PDT) Received: by telemark.stanford.edu (8.9.1/8.7.3) id OAA06030; Thu, 24 Sep 1998 14:50:17 -0700 (PDT) Date: Thu, 24 Sep 1998 14:50:17 -0700 (PDT) From: Booker Bense <bbense@networking.stanford.edu-DeleteThis> To: Multiple recipients of list <wind_talk@opus.hpl.hp.com-DeleteThis> Subject: Re: question about tides In-Reply-To: <2.2.32.19980924200337.009b3f84@interval.com-DeleteThis> Message-Id: <Pine.GSO.3.96.980924142623.5155B-100000@telemark.stanford.edu-DeleteThis> Content-Type: TEXT/PLAIN; charset=US-ASCII
On Thu, 24 Sep 1998, Chris Kogelnik wrote:
> http://www.universe.digex.net/~dave/xtide/
>
> Is a good source. This is site of the author of the Xtide program.
>
> Just to clear up something else, the SF Bay has 4 tides per day, not 2.
> There are 2 highs and 2 lows.
- Not according to websters:
tide
2a (1): the alternate rising and falling of the surface of the ocean
and of water bodies (as gulfs and bays) connected with the ocean that
occurs usu. twice a day and is caused by the gravitational attraction
of the sun and moon occurring unequally on different parts of the
earth.
- If you're going to split hairs, a tide contains four parts
an ebb ( low tide ), a slack ( no current ), a flood ( high tide)
and another slack ( no current the other way ), so by your lights
there are 7 tides a day on average.
- Booker C. Bense
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