Green Options

The Northwest Passage is opening up. As Arctic ice melts, the shipping season will grow, and with it, the pressures on the fragile Arctic ecosystem.

Friday the 13th just got a little scarier. Here are 13 facts about the realities of global warming.

The numbers speak for themselves — we must make 2009 the showdown year for global warming action. There is no time to lose.

35%

Increase in the global carbon dioxide emissions from the burning of fossil fuels since the Kyoto Protocol was signed in 1992.

388.57 ppm

Average concentration of carbon dioxide in the atmosphere in May 2008, a record high.

541 – 970 ppm

The projected concentration of carbon dioxide in the atmosphere by 2100 under a business as usual scenario where we don’t dramatically reduce global warming emissions.

260 – 280 ppm

Average concentration of carbon dioxide in the atmosphere before industrial emissions.

According to the National Snow and Ice Data Center (NSIDC),

Following a record rate of ice loss through the month of August, Arctic sea ice extent already stands as the second-lowest on record, further reinforcing conclusions that the Arctic sea ice cover is in a long-term state of decline. With approximately two weeks left in the melt season, the possibility of setting a new record annual minimum in September remains open.

A record was set for Arctic sea ice melt in 2007.  Much was made of the sea ice “recovery” over the ensuing winter of 2007/2008.  However, while the Arctic sea ice returned to an extent similar to that of the winter prior to the record melt, much of the new ice was very thin.  Thus even though 2008 has been a cooler year than 2007 (partially due to a strong La Nina cycle), the new, thinner ice has proven to be more susceptible to melting, as the graphic following the jump illustrates.