Consider the case of wheat, whose price has almost doubled since the summer. The immediate cause of the wheat price spike is obvious: world production is down sharply. The bulk of that production decline, according to U.S. Department of Agriculture data, reflects a sharp plunge in the former Soviet Union. And we know what that’s about: a record heat wave and drought, which pushed Moscow temperatures above 100 degrees for the first time ever.
The Russian heat wave was only one of many recent extreme weather events, from dry weather in Brazil to biblical-proportion flooding in Australia, that have damaged world food production.
The question then becomes, what’s behind all this extreme weather?
To some extent we’re seeing the results of a natural phenomenon, La Niña — a periodic event in which water in the equatorial Pacific becomes cooler than normal. And La Niña events have historically been associated with global food crises, including the crisis of 2007-8.
But that’s not the whole story. Don’t let the snow fool you: globally, 2010 was tied with 2005 for warmest year on record, even though we were at a solar minimum and La Niña was a cooling factor in the second half of the year. Temperature records were set not just in Russia but in no fewer than 19 countries, covering a fifth of the world’s land area. And both droughts and floods are natural consequences of a warming world: droughts because it’s hotter, floods because warm oceans release more water vapor.
As always, you can’t attribute any one weather event to greenhouse gases. But the pattern we’re seeing, with extreme highs and extreme weather in general becoming much more common, is just what you’d expect from climate change.
The usual suspects will, of course, go wild over suggestions that global warming has something to do with the food crisis; those who insist that Ben Bernanke has blood on his hands tend to be more or less the same people who insist that the scientific consensus on climate reflects a vast leftist conspiracy.
But the evidence does, in fact, suggest that what we’re getting now is a first taste of the disruption, economic and political, that we’ll face in a warming world. And given our failure to act on greenhouse gases, there will be much more, and much worse, to come.
The theory that climate change leads to food production shortages leads to political instability is nothing new, the Pentagon has been pushing that for some time now.
Recent war games and intelligence studies conclude that over the next 20 to 30 years, vulnerable regions, particularly sub-Saharan Africa, the Middle East and South and Southeast Asia, will face the prospect of food shortages, water crises and catastrophic flooding driven by climate change that could demand an American humanitarian relief or military response.
Of course, the Pentagon may want to move up their timetable from 20-30 years to, you know, now. The combination of economic turmoil and climate change is already turning out to be pretty potent. Ask Tunisia, Sudan, Egypt, or Ivory Coast. Krugman is right however when he says more is coming, and coming soon.
My guess is very soon.
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