model predictions
illconsidered | October 3, 2007Arctic sea ice dropped to a record low in 2007, surpassing by a very striking margin (twenty four percent!) the previous record of two years ago.
Record Arctic Sea Ice Loss in 2007
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Large images
Arctic, September 16, 2007 (1.3 MB JPG)
Graph of Arctic Sea Ice Decline (200 KB PDF)
This record is about the sea ice extent, or the area of ocean surface covered by ice, and does not even reflect the ice loss due to thinning of the ice pack. Factoring this thinning (up to 40% by some estimates) makes a dramatic observation even more foreboding.
While the…
illconsidered | April 26, 2006This is just one of dozens of responses to common climate change denial arguments, which can all be found at How to Talk to a Climate Sceptic.
Objection:
In 1988 Hansen predicted dire warming over the next decade and he was off by 300%. Why in the world should we listen to the same doom and gloom from him today?
Answer:
While it may well be simply ignorant repetition of misinformation in some instances, at its source, this story is a plain and simple lie.
In 1988, James Hansen testified before the US Senate on the danger of Anthropogenic Global Warming. As part of that testimony he presented…
illconsidered | April 25, 2006This is just one of dozens of responses to common climate change denial arguments, which can all be found at How to Talk to a Climate Sceptic.
Objection:
Clouds are a very large negative feedback that will stop any drastic warming. The climate models don't even take cloud effects into account.
Answer:
All of the Atmospheric Global Climate Models used for the kind of climate projections reported on by the IPCC take the effects of clouds into account. You can read a discussion about cloud processes and feedbacks in the IPCC TAR.
It is true however that clouds are one of the largest sources of…