Arctic Sea Ice Extent.

北极海冰规模。

youdao

Sea-ice extent in August was also extremely low, second only to August 2007 (Fig. 1).

八月份的海冰范围也非常小，仅高于2007年八月的水平。

youdao

But in 2008, Arctic sea ice extent was the second-lowest on record, with losses particularly acute in the Beaufort sea.

但是2008年是北冰洋海冰面积有记录以来倒数第二小的年头，波弗特海地区海冰面积更是锐减得厉害。

youdao

The scientists say the average Arctic sea ice extent last month was about five million square kilometers.

VOA: special.2009.10.27

September is the month when the sea ice extent is at its lowest.

VOA: special.2009.10.27

The total of sea ice is known as the sea ice extent.

VOA: special.2009.10.27

Average monthly Arctic sea ice extent data shows a clear deceasing trend since 1979.

UNESCO: Social and Human Sciences

The extent of Arctic sea ice extent fell to 4.10 million square kilometers on August 26, 2012.

FORBES: As Arctic Ice Reaches Record Low, Meteorologists Name Humans 'Dominant' Cause Of Climate Change

Based on predictions of sea ice extent from climate change models, the penguins are likely to see their numbers plummet by 95% by 2100.

BBC: Emperor penguins face extinction