Understanding the Concept of Sea Level in Relation to Mountain Height

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Sea level is defined as the baseline for measuring the height of mountains, arbitrarily set to zero, and is determined by averaging tidal levels over time. It is not a universal constant but varies locally, with measurements taken from different locations contributing to a global model. The height of mountains like Mt. Everest is measured from this sea level, but other mountains, such as Mauna Kea, can be taller when measured from their base to peak. Modern techniques like GPS and radar improve the accuracy of these measurements, while tidal influences are averaged out to establish mean sea level. Understanding sea level is crucial for accurate altitude measurements and geographical modeling.
  • #31
Amazing GRACE

Nereid

Amazing GRACE :wink: and GOZE and breath taking results:

GOCE_S_C2_geoid_bg_L.jpg


Notice that the deep red areas are more or less -very roughly- antipode. That reminds me of another World map in relation to sea levels:

http://home.wanadoo.nl/bijkerk/palaeogeography.GIF

With a little imagination you could draw an oblique geographic world from that, the poles being in the centre of the blue spots, the equator following the big orange wave. Aint it curious?

This is the origine of that second pic: http://www.sciencemag.org/cgi/content/full/295/5564/2438
 
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  • #32
Andre said:
some usefull links for Dutch sea level history:

http://www.ncg.knaw.nl/SubBZ/BeginSubBZ.htm
http://hanserren.cwhoutwijk.nl/co2/denhelder.html
That second link is very interesting. Actually I just remember now.. a few weeks ago there was a very stormy western wind. I was at the west of the IJsselmeer (a lake) and the water level was SO low! that you could actually go down and walk on the bottom of the lake for a considerable length from the bank.. reminded me of that tale where the water parted and Jesus walked across a lake.. sounds very possible in such a scenario :biggrin:
 
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