Aside from his work on climate change, he looks like your standard doomer to me -- just more formal and more prolific but generally just as wrong about the doom predictions.
From the non-climate change articles in the sampling:
For "The End of Cheap Food" in 2007 for example, he was predicting the era of cheap food is over, and that the global middle class would be spending TWO AND A HALF times more of its earnings for food in ten years.
Well, first, looking at corn and wheat -- the two specific foods he mentioned as big problems, long term futures charts show these about as cheap now (9 years later) as they were in 2007, bumping along near the bottom of the price range since early 2007.
So he's COMPLETELY wrong on those two predictions.
With the peak oil doom meme, in 2007, he only says "perhaps" peak oil is here, and sites doomers like Kunstler. However, it's clear he's predicting significant decline in oil within a decade. And here we are nearly a decade later with a major glut and the biggest worry being producers being bankrupted due to the major oil price crash.
So that one looks COMPLETELY wrong also.
And in early 2008 he claims a "perfect storm" is coming that will create a "food catastrophe" within two years, with arable land devoted to bio-fuels being the straw that breaks the camel's back. In this article he cites rice as a big problem. Well, rice is under half of what it was at the time, and again, is near the bottom of the 2007-present range.
No food catastrpohe, only a spike in rice prices - no lasting problem with rice, and by 2010, instead of a disaster, rice is at the bottom of the price range.
So he's COMPLETELY wrong on this one also.
In "The Food Bubble" in 2011 he just talks generally about irrigaton and aquifers being a long term problem and doesn't make any specific predictions. Given BAU and AGW, I have no problem with a long term negative outlook, so this one is neutral as he's stating the obvious.
In discussing "The Future of Food Riots" in early 2011, citing rioting over food in Algeria, he also avoids making any specific predictions. He cites climate change and irigation as long term problems. So nothing unreasonable here, but again, he was only stating the obvious long term big issues. He did mention the liklihood of food refugees (and them having the same kind of problems we're having with real world political refugees).
So he's a prolific blogger spewing doomer porn. I realize that is very attractive to many on this site, but shouldn't the folks being praised be expected to have their predictions be SOMEWHAT accurate? Or is all it takes to be a guru of the doom club that you are proclaiming doom loudly and frequently?
Given the track record of the perma-doomer blogs, I wouldn't bet a fast crash doomer's money on their predictions.