Saturday, June 20, 2009

Dave Mindeman: Climate Change: Who's Dispensing the "Bunk"?
Climate change happens over time and it can certainly occur naturally. But the current temperature averages are climbing at an unnatural rate... not in huge increments but larger increments than can be explained by natural phenomena. There is proof of that. If deniers would just take away the politics for a moment and look at the data realistically, they could help to work for solutions rather than frantically try to maintain a dangerous status quo.
Note to Dave Mindeman: Sorry, it's you who's "dispensing the bunk above"
Some information from a David Archibald paper (available here) puts the modest 20th century warming into perspective:
What is also interesting is the 2.2° temperature rise from 7.8° in 1696 to 10.0° in 1732. This is a 2.2° rise is 36 years [in Central England]. By comparison, the world has seen a 0.6° rise over the 100 years of the 20th century. That temperature rise in the early 18th century was four times as large and three times as fast as the rise in the 20th century.

The significance of this is that the world can experience very rapid temperature swings all due to natural causes. The temperature peak of 10° in 1732 wasn’t reached again until 1947.

3 comments:

Dave M. said...

Not exactly sound scientific theory to use the temperature of a single area in Central England and use that as a determination for global temperature variations. Typical denier factfinding.

papertiger said...

You work with what you got. Dave, if you have other thermometer readings from between 1696 and 1732, by all means show us.

Since you object to a 'single area' being used to determine global temperatures, I assume you'll be sending this critique right along to Real Climate, which is the website of Michael Mann.
Mann created a temperature history of the world using tree cores from just East of the Sierra Nevada, in the White Mountains of California.
It's the same one Al Gore uses in AIT...

papertiger said...

BTW Dave, Mann's reconstruction from high alpine tree cores says 1732 was bone shillingly cold.

Gee I wonder why?