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On Global Warming, Denial, Ice, and The MV Akademik Shokalskiy

People who find it politically inconvenient to believe that global warming is real are taking glee at the suffering on board the MV Akademik Shokalskiy, a boat filled with climatologists that’s stuck in frozen waters near Antarctica. They’re writing articles suggesting that the existence of thick ice near Antarctica somehow suggests that global warming is [...]

Ice Continues Dramatic Melt In Arctic And Below

Ice cover on large bodies of water continues to decline across the north, in the Arctic, but also in the Great Lakes, according to a new report. [...]

Arctic Ice Reaches September Minimum Volume: Only 4000 Cubic Kilometers Left, 9500 Cubic Kilometers Below Average

Earlier this week, the University of Washington’s Polar Science Center released its latest Arctic sea ice measurements to make them current as of September 15, 2010. The Polar Science Center uses a satellite to measure the three-dimensional volume of the Arctic sea ice (a approach different than that of the National Snow and Ice Data [...]

Surprise Late-Season Melt: Arctic Sea Ice Extent Falls Below 2008 Level

The melting of the Arctic sea ice literally crossed another line yesterday, as the area of Arctic sea ice fell below the level of two years ago:

The collapse of the Arctic sea this year is only surpassed by the calamity of 2007. The four lowest years of Arctic sea ice extent are the [...]

Double Dip: Arctic Ice Resumes Late Season Melt

Last week, the National Snow and Ice Data Center reported:

Arctic sea ice appears to have reached its annual minimum extent on 10 September. The minimum ice extent was the third-lowest in the satellite record, after 2007 and 2008, and continues the trend of decreasing summer sea ice.

But appearances can occasionally be deceiving. After [...]

Arctic Sea Ice Extent, October 27 2009: 6 Standard Deviations Below the 1979-2000 Mean

The latest data on sea ice extent in the Arctic Ocean includes information up through October 27, 2009:

Source: National Snow and Ice Data Center

The National Snow and Ice Data Center’s standard for measuring a notable deviation from the 1979-2000 sea ice average is two standard deviations, which is a reasonably strong standard, [...]

Arctic Sea Ice Update: Less Ice Than 2008, Far Below 1979-2000 Average

Don’t fear the data.

The latest data on sea ice extent — updated on Thursday October 29, 2009 to reflect the most recently available data, up through Tuesday October 27, 2009 — in the arctic from the National Snow and Ice Data Center:

This updated data shows that as of October 27 2009, there’s [...]

Ribbon Seal Is On Its Own

Environmentalists need to consider the meaning of the ribbon seal ruling, which suggests that future conditions will often not provide a solid foundation for present-day action through the Endangered Species Act. [...]

Will 2008 Arctic Sea Ice Reach a Record Low Extent?

The National Ice and Snow Data Center has released its measurements of the extent of sea ice in the Arctic Ocean through the end of August. The area of the Arctic Ocean covered with ice is at its second-lowest point since measurements began (last year was the record):

The rate of sea ice loss [...]