Monday, March 23, 2009

The Antarctic Ice Shelf collapsed 5000 years ago

In my March 19th post, which is long, I pointed out that the world was much warmer than it is now between aroune 8000-5000 years ago. I also pointed out that the seas were higher by 2 meters (6.6 feet). Clearly some of the world's ice had melted back then and caused the seas to rise. Global warming hysteriacs never look back to any geologic event prior to the invention of the sacred thermometer. I have labeled the climatologists who don't look back before the invention of the thermometer as young-earth climatologists. Nothing of importance to them happened prior to about 200 years ago. Because they don't look back, the climatologists neither know of, nor tell you about this previous sea-level and temperature rise during historical times. They all say sea level and temperature rise is unprecedented. It isn't of course.

And neither is the collapse of the Antarctic ice shelves. Five thousand years ago, the 479 meter thick Amery Ice shelf was at least 80 km south of its present position. That means it had melted that much! Consider this:

The stability of floating ice shelves is an important indicator of ocean circulation and ice-shelf mass balance. A sub–ice-shelf sediment core collected during the Austral summer of 2000–2001 from site AM02 (69842.89S, 72838.49E) on the Amery Ice Shelf, East Antarctica, contains a full and continuous record of glacial retreat. The AM02 core site is ;80 km south of the floating ice shelf edge and contains a 0.5-m-thick Holocene surface layer of siliceous mud and diatom ooze of marine origin. Core data are supportive of sub– ice-shelf circulation models that predict the landward flow of oceanic water, and prove that the landward transport of hemipelagic sediments occurs beneath floating ice shelves over distances of at least ~80 km. An increase in sea-ice–associated diatom deposition in the upper part of the Holocene suggests that a major retreat of the Amery Ice Shelf to at least 80 km landward of its present location may have occurred during the mid-Holocene climatic optimum." Mark A. Hemer and Peter T. Harris, " Sediment core from beneath the Amery Ice Shelf, East Antarctica,"Geology; February 2003; v. 31; no. 2; p. 127–130, p. 127

The fact that 5000 years ago the ice shelf was melted by 80 km, about 50 miles, shows that the current supposed melting of the Antarctic ice shelves is certainly not an unprecedented event. Almost nothing these young-earth climatologists say is true. For more information on the Holocene Climate Optimum see the post just below this one.

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