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Note 44.325 MOUNT-L 325 of 517 CUPIDO::STRITAR "Andrej Stritar,IJS,(61)-371-321" 63 lines 31-JAN-1994 08:29
CUPIDO::STRITAR "Andrej Stritar,IJS,(61)-371-321" 63 lines 31-JAN-1994 08:29
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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" 29-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: 29-Jan-1994
Posted-date: 29-Jan-1994

Your question is a good one. Briefly answered it is as follows.

ELEVATION is usually used to define linear distance (feet or meters)
above MSL (mean Sea Level) and does not take account of the changes in
tide or the differences between different parets of the world. It is a
geographic term.

ALTITUDE is commonly used the same way, but physiologists prefer mmHg or
torr which measure barometric pressure and are thus precise and relevant
to lung gases etc etc. Altitude and elevation may be comparable, but the
PHYSIOLOGICAL altitude varies with weather and with temperature and is
different at the same ELEVATION near the North Pole and at the Equator.
So for mountain climbers ELEVATION is good enough, usually, but in
medical and physiological studies we need to talk TORR or MMHG. I can
explain more if you wish. It's a good point.

Charles Houston (I'm looking for an appropriate 'signature'

On Fri, 28 Jan 1994, Reka Gabor wrote:

>
> I have a question which has plagued me for years, and I have
> asked many people in different fields about it - to no avail.
> Perhaps one of you has some insight...
>
> The question is what does "Elevation above sea level" mean?
> Let me explain why the question is not frivolous.
> The level of seas is different. For example, the Atlantic
> and Pacific Ocean differ by over 10 meters at the Panama
> Canal.
> So, is it the case that sea levels are actually
> not at "sea level". Or is the sea level (the average
> of the tides?) really 0 at the seashore everywhere. If
> so, at some point inland, will there not be a conflict
> reconciling opposite seashores?
>
> coming to you from ? feet above sea level,
>
> Csaba
>

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