The Antarctic Peninsula sea ice expanse is nearly 200% greater now than usual.

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She had travelled to the Arctic and the Antarctic to study the sea ice.

BBC: Katharine Giles

The extent of sea ice in the Antarctic has been relatively stable in recent years (unlike in the Arctic), although this picture hides some fairly large regional variations.

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Cryosat-2 will measure very precisely the rates of change of sea and land ice in the Arctic and the Antarctic.

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During the Holocene, the Greenland and Antarctic ice sheets have been relatively stable, as reflected in the stability of the sea level.

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Mechanisms on the verge of being instigated include loss of Arctic sea ice, shrinkage of the Greenland ice sheet, loss of Antarctic ice shelves, and shrinkage of the Antarctic ice sheets.

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Satellite images have revealed that three massive icebergs have been calved from the Ronne Ice Shelf in the Weddell Sea on the Antarctic coast.

BBC: Three giant bergs calved in Antarctic

Even if wintertime Antarctic sea ice were to increase or decrease significantly in the future, it would not have a huge impact on the climate system, according to the Center.

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In reply, Dr Toepfer said analysis of whaling records and modelling studies showed that Antarctic sea ice had retreated south by 2.8 degrees of latitude between the mid 1950s and the early 1970s.

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