June 30, 2009

Worried about Slurpees

I wonder if anyone really thinks about what the world was like before this stuff froze? I mean if it thawing is going to wreak havoc on the world, what havoc did it wreak when it was not frozen? Are we to believe that the ice ages which froze this stuff caused the world to bloom into a vast biodiversified garden of Eden ? Now a slight warming will unleash this menace that was fortuitiously frozen for centuries. This scourge locked away, allowing the Earth to create vast tropical rain forest where most of life on our planet resides, but will now be exterminated by this unleashed toxin CO2

A Slurpee for the uninformed is a frozen carbonated drink, found at the local 7-11. Oh and yes it comes in Super Size

FROM-China View

Super-size deposits of frozen carbon threat to climate change: study

WASHINGTON, June 30 (Xinhua) -- The vast amount of carbon stored in the arctic and boreal regions of the world is more than double that previously estimated, according to a study published this week in Global Biogeochemical Cycles, a journal of American Geophysical Union.

The amount of carbon in frozen soils, sediments and river deltas (permafrost) raises new concerns over the role of the northern regions as future sources of greenhouse gases.

"We now estimate the deposits contain over 1.5 trillion tons of frozen carbon, about twice as much carbon as contained in the atmosphere," said Dr. Charles Tarnocai, Agriculture and Agri-Food Canada, Ottawa, and lead author.

Dr. Pep Canadell, Executive Director of the Global Carbon Project at CSIRO, Australia, and co-author of the study says that the existence of these super-sized deposits of frozen carbon means that any thawing of permafrost due to global warming may lead to significant emissions of the greenhouse gases carbon dioxide and methane.

Carbon deposits frozen thousands of years ago can easily break down when permafrost thaws releasing greenhouse gases to the atmosphere, according to another recent study by some of the same authors.

"Radioactive carbon dating shows that most of the carbon dioxide currently emitted by thawing soils in Alaska was formed and frozen thousands of years ago. The carbon dating demonstrates how easily carbon decomposes when soils thaw under warmer conditions," said Professor Ted Schuur, University of Florida and co-author of the paper.

The authors point out the large uncertainties surrounding the extent to which permafrost carbon thawing could further accelerate climate change.

"Permafrost carbon is a bit of a wildcard in the efforts to predict future climate change," said Dr. Canadell. "All evidence to date shows that carbon in permafrost is likely to play a significant role in the 21st century climate given the large carbon deposits, the readiness of its organic matter to release greenhouse gases when thawed, and the fact that high latitudes will experience the largest increase in air temperature of all regions."

Carbon in permafrost is found largely in northern regions including Canada, Greenland, Kazakhstan, Mongolia, Russia, Scandinavia and the United States.


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