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Copy of Antarctica
Transcript of Copy of Antarctica
Mountain range extending north from Antarctica.
Contains 0.24 m of sea-level equivalent
Ice shelves fringe much of the Antarctic Peninsula's coastline.
Many of these ice shelves are rapidly disintegrating.
West Antarctic Ice Sheet
Could raise global sea levels by 3.3 m on full melting
West Antarctic Ice Sheet is largely grounded below sea level. This makes it vulnerable to melting at its base by warm ocean currents
West Antarctica is drained by fast-flowing ice streams, such as Pine Island Glacier, which ends in a large ice shelf.
Elevations are up to 3000 m above sea level, and the ice is over 2000 m thick.
Ice thickness is up to 2000 m West Antarctica
The Transantarctic Mountains
Ross Ice Shelf
Divide East and West Antarctica
The largest of the three ice sheets, with 53 m sea-level equivalent of ice.
East Antarctica is high, dry, cold, and currently gaining mass. It largely rests on rocks above sea level.
Snow accumulation in East Antarctica partly, but not fully, offsets loss in West Antarctica and the Antarctic Peninsula.
87% of glaciers around the Antarctic Peninsula are currently receding, and most are accelerating and thinning in response to warmer air temperatures.
Pine Island Glacier is currently thinning and accelerating. It is the 'Weak Underbelly' of the Antarctic Ice Sheet, and it is vulnerable to very rapid recession into ever deeper waters.
The South Pole
The South Pole is in East Antarctica at about 2,800 m above sea level. The ice sheet is over 2000 m thick here.