All,

A most interesting discussion about Sunstein's essay on Montreal and Kyoto protocols. One remark of David Downie's caught my eye: "there is an emerging consensus regarding a very real possibility that one or more tipping points exist in the global climate system. Going beyond these points could produce very large, very negative, and, for all practical purposes, nearly irreversible impacts."

This isn't a new observation, of course, but I was thinking about Katrina and New Orleans recently, and pondering all the science that warned of pretty nearly exactly what happened, science that did not succeed even in enabling intelligent hedging by, say, short-sellers in insurance stocks. Never mind saving people's lives and property.

One element of the Katrina story that has gotten no attention in the anniversary news coverage is the Atchafalaya and the vision it offers of a radical rethinking of how to rebuild New Orleans. The Mississippi River is an impressive stream, and on a time interval of a small number of centuries, the river switches its course. This is how the Mississippi managed build a delta from Memphis down to the Gulf of Mexico that is about 200 miles wide. In the 1950s hydrologists realized Ol' Man River was gonna switch again. The new channel is the Atachafalaya River, about 90 mi north of New Orleans, and it now carries about a third of the flow of the river. It is trying to capture the rest.

If it did, that would doom the port of New Orleans and force a costly relocation of the petrochemical facilities along the lower Mississippi. When such a threat appeared in the 1950s the logical answer was to call in the Army Corps of Engineers. They built an elaborate system of plumbing that has so far kept the river in its bed, mostly. And the cost of doing so helped to make Louisiana by far the largest recipient of Corps money in the country. (Sort of like Israel and Egypt for our foreign aid program. Holding back the Red Sea for a while is small change compared to denying the Atchafalaya.)

So if the people of the US were really alert to tipping points and irreversible change, we'd be talking about how to facilitate the opportunity for the poor people scattered by the four winds of Katrina to resettle peaceably, and how to move New Orleans over to Morgan City, where the Mississippi wants to be.

I won't say that Cass Sunstein's approach to climate looks as narrow to those who have posted here as Mayor Nagin and President Bush do to a hydrologist thinking about the Atchafalaya. But I have wondered if any of you have ideas about how ideas so far from conventional move into the main stream in time. The Times-Picayune warned of a big hurricane destroying New Orleans in a major series in 2004. That wasn't soon enough, or maybe nothing would have been. And climate change seems, like Katrina, an abundantly, even meticulously predicted catastrophe.

What do we social scientists have to offer in light of these developments? (Hint: that is a genuine question.)

Cheers,
Kai

Kai N. Lee, Rosenburg Professor of environmental studies, Center for Environmental Studies, Williams College, Kellogg House, 41 Mission Park Drive, Williamstown MA 01267 USA. Voice & voicemail: 01 +413-597-2358; fax: 01+413-597-3489.
http://www.williams.edu/ces/ces/people/klee/klee.htm



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