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Note 44.327 MOUNT-L 327 of 517 CUPIDO::STRITAR "Andrej Stritar,IJS,(61)-371-321" 51 lines 31-JAN-1994 12:38
CUPIDO::STRITAR "Andrej Stritar,IJS,(61)-371-321" 51 lines 31-JAN-1994 12:38
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From: STENAR::STENAR::MRGATE::"X400::1=de::2=d400::3=tr::5=edu::4=metu::4=cc::4=vm::6=MOUNT-L" 31-JA
To: CUPIDO::STRITAR
CC:
Subj: Re: Elevation above sea level

From: NAME: Mountaineering Discussion List MOUNT-L
FUNC: edu <6=MOUNT-L@4=VM@4=CC@4=METU@5=EDU@3=TR@2=D400@1=DE@X400@STENAR>
To: NAME: Multiple Recipients of
FUNC: edu <6=MOUNT-L@4=VM@4=CC@4=METU@5=EDU@3=TR@2=D400@1=DE@X400@STENAR>

RFC-822-HEADERS:
Comments: To: "Mountaineering Discussion List MOUNT-L"
Comments: cc: Multiple Recipients of

Date: 31-Jan-1994
Posted-date: 31-Jan-1994

You're right, Willie; I thought I had mentioned this. The variation
between Denali and a similar elevation on the equator is about 2000 feet;
I don't know of any table showing gradiatioins by latitutde. Then there's
a seasonal change, documented by West, showing that between winter and
summer there's a variation of several torr on the top of Everest. And
none of this considers the effect of the moon in creating lunar air tides
- a real affair, or of the jet stream wanderings. Too complecated.
Let's just talk about feet and torr. But it's interesting. Cheers.

On Sun, 30 Jan 1994, william hunt wrote:

>
> > The question is what does "Elevation above sea level" mean?
>
> Let us make the question even more complicated. Since the earth is
> not a sphere, it's more like a slightly pear shaped ellipsoid. This
> implies that even if the oceans mean sea level are the same, the actual
> distance to the center or the earth is not the same. Of course, even
> the "center" needs a good definition too.
>
> Also along the same lines, the air pressure gradiant isn't the same
> for polar vs equatorial air. So the average pressure at the same
> measured distance above sea level isn't the same for Denali as
> Cotopaxi. I have found accurate tables for standard air pressure at
> 100 foot intervals to 300,000 feet, but I have found one stating the
> difference from the poles to the equator. Anyone know how much
> variation there is?
>
> Willie Hunt
>

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