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When I began writing _A Nation of Farmers_ last year, one of the first sections I completed was the introduction to the agricultural impact of climate change. I finished it in early March, and felt that I'd produced a fairly cutting-edge synthesis of the implications of Global Warming for food and agriculture - and about the power of food and agriculture to mediate global warming. Pleased that I'd written something useful and that at least one chapter of the book was finished, I sent it off to my publisher for their perusal and turned to other things. I could have just saved myself time and shoved it in the recycling bin, deleted it from my hard drive and taken a nap.
It wasn't that wasn't carefully researched or written, just that the data on climate change is coming in so fast right now that what I wrote this spring is now largely outdated. There are now further refinements, subsequent studies and new models to deal with. I subscribe to a number of news feeds, and people send me additional studies and items of interest. My husband, an astrophysicist who teaches environmental physics also tracks the same material. And what, overwhelmingly I'm seeing, and most scientists seem to be seeing, is that global warming is progressing far faster than anyone would ever have expected.
For example, as recently as this spring, the IPCC report was estimating that arctic ice might disappear in the summers as early as 2050, but more likely towards the very end of this century. Research by James Hansen and other scientists at NASA projected an ice free arctic as early as 2023 this year, which stunned the scientific community. http://news.bbc.co.uk/2/hi/science/nature/7006640.stm In fact, however, this summer's ice retreat was so dramatic, that in, fact, the University of Colorado's National Snow and Ice Data Center is now suggesting that the arctic could be ice free as early as 2015, 8 years from now. In less than six months, we've jumped our predictions for a major tipping point factor up by a minimum of 30 years. That's astonishing - and terrifying.
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