Received: from hplms26.hpl.hp.com by opus.hpl.hp.com with ESMTP (1.37.109.18/15.5+ECS 3.3+HPL1.1) id AA169726259; Thu, 7 Aug 1997 13:37:40 -0700 Return-Path: <bbense@telemark.stanford.edu-DeleteThis> Received: from telemark.stanford.edu by hplms26.hpl.hp.com with ESMTP (1.37.109.16/15.5+ECS 3.3+HPL1.1S) id AA057476260; Thu, 7 Aug 1997 13:37:40 -0700 Received: (from bbense@localhost) by telemark.stanford.edu (8.8.7.Beta3/8.7.3) id NAA10693; Thu, 7 Aug 1997 13:27:45 -0700 (PDT) Date: Thu, 7 Aug 1997 13:27:45 -0700 (PDT) From: Booker Bense <bbense@networking.stanford.edu-DeleteThis> To: Multiple recipients of list <wind_talk@opus.hpl.hp.com-DeleteThis> Subject: Re: Pressure Gradient's? In-Reply-To: <199708072004.NAA26148@apple.com-DeleteThis> Message-Id: <Pine.GSO.3.96.970807131746.10273C-100000@telemark.stanford.edu-DeleteThis> Content-Type: TEXT/PLAIN; charset=US-ASCII
On Thu, 7 Aug 1997, Edward W. Scott wrote:
> Thank you! I was wondering the same thing, and whether anyone would put
> the current converted reports for the offshore (or onshore) data in an
> e-mail or on their website?
millibars = (1013.2/29.92)* inches of mecury
or you can use
http://nwselp.epcc.edu/elp/wxcalc.html
> Btw - I don't care whether it's the onshore or offshore data that's
> converted, I just wish they were all in the same units. Is that too much
> to ask?
- Yes, just look at the latest flame war in rec.windsurfing about
feet & inches.
>
> General Q - Is there a reason why the buoys are in mB and the onshore
> stations are in inches?
- Yes, bouys are used mostly by scientists, the onshore stations are
used by boaters...
> Does this have to do with New World Order or
> some other commie plot? :).
>
"ATMOSPHERIC PRESSURE"
Normal atmospheric pressure (barometric pressure) at sea level (U.S.
Standard Air Pressure) is 1013 millibars (or 29.92 inches). The JTWC
states its atmospheric pressure readings in millibars. Storm systems
relate to areas in the Upper and Lower Troposphere where atmospheric
pressure is more than 1013 millibars or less than 1013 millibars.
High pressure areas can be as high as 1045 millibars. Low pressure
areas (which are the focus of tropical storm systems) can fall to 950
millibars or lower, depending on the severity of the storm system.
The measurement of barometric pressure using mercury in a glass vacuum
tube results in a gauged reading of +/- 29.92 inches of mercury. The
alternative statement of atmospheric pressure is in "newtons",
"pascals" and "millibars". One newton of pressure is the amount of
force required to accelerate 1 kilogram 1 meter per second. One
pascal equals 1 newton of force per square meter (1 pascal = 1
newton/M2). One millibar equals 100 pascals (1 millibar = 100
newtons/M2). Therefore, standard pressure of 1013 millibars at sea
level is actually 101,300 pascals. In the future, under the metric
system, it is expected that daily atmospheric readings will be
expressed in pascals rather than in millibars.
- Alta Vista is your friend...
- Booker C. Bense : bbense@stanford.edu-DeleteThis
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