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Originally posted by Sinter Klaas
Only I thought they still thought Antarctica has not been Ice free for at least 250.000 years.
Originally posted by Sinter Klaas
reply to post by queenannie38
Ice core samples are collected by scientists for a reason. I thought that reason was, to get a glimpse of the history of the Earth's climate as far back as possible. Right ?
Obviously this makes them get their samples from places where the Ice sheet is as thick as possible. Don't you think ?
Originally posted by Sinter Klaas
reply to post by queenannie38
Well that map rules out future use of the ice core drillings as proof Antarctica was covered in Ice completely. It does proof that we simply don't know.
Thank you.
Airborne radar survey above Vostok region, east-central Antarctica: ice thickness and Lake Vostok geometry
During the 1999-2000 Italian Expedition, an airborne radar survey was performed along 12 transects across Lake Vostok, Antarctica, and its western and eastern margins. Ice thickness, subglacial elevation and the precise location of lake boundaries were determined. Radar data confirm the geometry derived from previous surveys, but with some slight differences. We measured a length of up to 260 km, a maximum width of 81km and an area of roughly 14 000 km2. Along the major axis, from north to south, the ice thickness varies from 3800 to 4250 m, with a decreasing gradient.
From west to east the ice thickness is fairly constant, except for two narrow strips located on the western and eastern margins, where it increases with high thickening rate.