Segundo o que entendi, uma mudança de alguns graus a cada 41.000 mil anos leva a uma alteração no clima terrestre, com verões mais quentes e invernos mais frios. Ainda há muita lingüiça para ser descoberta embaixo deste angu, como dizia minha avó...
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Sunday, May 21, 2006
BBC's 'Climate Chaos': mark the Series out of 50......
Somebody asked me recently to list the main factors that drive climate changes. I thought it might be useful to repeat the exercise here to demonstrate once and for all that, by trying to reduce climate change to carbon dioxide and temperature, the myth of 'global warming' illustrates to perfection the serious sin of monocausal explanation (a point so tellingly made by the famous meteorologist, Professor Richard Lindzen, in his video clips below [see Saturday blog]).
On Wednesday this week (24th May), the BBC (yet again!) launches a two-week television Series, 'Climate Chaos'. Readers of 'EnviroSpin' who are planning to watch (endure) this doom-laden odyssey of drowning polar bears, flooding islands, and the burning Bush (the published schedules, as you will see, are not encouraging with respect to any sense of balance) might like to take time to mark the BBC out of 50 by ticking off the number of the following climate factors from all scales which receive serious attention (nay, any attention) and balanced analysis during the Series.
I have deliberately compressed the list to only 32 composite climate drivers to enable such a couch-potato exercise (please note that, because of their overall importance, the final two factors carry 10 marks each). Feel free to print out the list. It may make the Series more endurable. And, by "serious attention", I mean as much balanced coverage as Item 28: "Human-induced emissions of 'greenhouse' gases". The image opposite [NASA, from Wikipedia] illustrates just one of the 32 climate drivers selected below, a medium-term driver, namely the Earth's spin wobble, which causes a slow 2.4° change in the tilt of the axis (obliquity) on a cycle of c. 41,000 years. Currently the Earth is tilted at 23.44 degrees from its orbital plane. The more the tilt moves away from 22.1 degrees, the colder the winters, the warmer the summers, and vice versa.
http://greenspin.blogspot.com/
.I have deliberately compressed the list to only 32 composite climate drivers to enable such a couch-potato exercise (please note that, because of their overall importance, the final two factors carry 10 marks each). Feel free to print out the list. It may make the Series more endurable. And, by "serious attention", I mean as much balanced coverage as Item 28: "Human-induced emissions of 'greenhouse' gases". The image opposite [NASA, from Wikipedia] illustrates just one of the 32 climate drivers selected below, a medium-term driver, namely the Earth's spin wobble, which causes a slow 2.4° change in the tilt of the axis (obliquity) on a cycle of c. 41,000 years. Currently the Earth is tilted at 23.44 degrees from its orbital plane. The more the tilt moves away from 22.1 degrees, the colder the winters, the warmer the summers, and vice versa.
http://greenspin.blogspot.com/
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