Saturday, September 16, 2006

Bolt burger #3 is a FUD dud

3: Gore says ice cores from Antarctica, that go back 650,000 years, show the world got warmer each time there was more carbon dioxide in the air.

In fact, as the University of California's Professor Jeff Severinghaus and others note, at least three studies of ice cores show the earth first warmed and only then came more carbon dioxide, many hundreds of years later. So does extra carbon dioxide cause a warming world, or vice versa?

Both. One begets the other.

In a positive feeback loop, better termed a self-reinforcing feedback loop, extra carbon build-up produces a lagging warming in our shared atmosphere. This warms up the frozen permafrost of the Siberian tundra and thaws long dead organic matter from previous ages, plant and animal, releasing tonnes of safely trapped carbon dioxide back into the atmosphere to speed up the rate of warming again. See :::[Earth to climate model science: don't forget the permafrost!]

That is enough carbon to take us to a six degree increase on the globe's average temperature, if it was all released into the atmosphere:

If all the permafrost thawed and was released as heat-trapping carbon dioxide, it could nearly double the 730 billion tonnes of carbon now in the atmosphere, the scientists said.

It's not hard explain the lag observed by Professor Severinghaus:

Carbon stored over tens of thousands of years could bubble up from thawed soil in as little as 100 years.

If this is the worst thing (that I can find) that Severinghaus has to say about Al Gore's An Inconvenient Truth, "My wife fell asleep. Of course, I was on the edge of my chair.", I don't see what business Bolt has invoking him to for his uncertainty and doubt mongering. There are some pretty dodgy ingredients packed into this patty.

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