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Posted on 12/10/2010 1:18:44 PM PST by 2ndDivisionVet
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The effect of glaciers on the compression/decompression is measurable and is done by using fixed base receivers to collect GPS data that indicate changes in elevation. About 1/4th inch per year in some cases. The sea levels will lower with massive glaciation because of the cycle of water, evaporation, rain. When huge glaciers that covered half of the northern hemisphere formed ocean water evaporated and fell as snow on those glaciers thus locking up water that would otherwise fall back as rain into oceans and their feeder rivers. This also took many millenia but the last ice age from start to finish covered many millenia.
So... how much has the ‘mean’ sea level fallen or risen over the past few millenia?
Not much. They have been at or near their current levels since the end of the last Ice Age; you know, when the massive North American glaciers withdrew (melted) and released all of that water into the river and ocean systems. About 10 to 20 thousand years ago the earth ended a warming period in in which the ice sheet that covered about a third of the globe melted and receded. It’s only been less than a couple of hundred years since anyone has thought about or cared about the ocean levels so in that short amount of time there have been miniscule changes and no reglaciation.
Looking for Atlantis
Posted by Matthew Battles on December 29, 2010, 5:12 PM
http://www.gearfuse.com/looking-for-atlantis/
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