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Centuries of land-use practices profoundly impact earth system, UNH scientists report

ble to offset carbon emissions. "It is important to know if a carbon sink in an ecosystem today is simply the result of recovery from having been cut down in the past, or a net new storage for carbon over the long term," says Hurtt.

Moreover, he notes, without this historical analysis of land-use activities, even the most sophisticated models would be inaccurate. "Even if you didn't care about the past and wanted to focus on future global environmental changes, you would still have to first 'initialize' your model to the current state of the planet. Because the current state has been altered by a history of land-use activities over most of the planet, knowledge of historical activities increases the knowledge of the current conditions," Hurtt says of the work.

Late last year, Hurtt presented the land-use research, now published in Global Change Biology, in a "platform" presentation at the Seventh International Carbon Dioxide Conference held in Boulder, Colorado. Since that time, the presentation has been downloaded more than 1,000 times by individuals interested in the data.


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Contact: George Hurtt
george.hurtt@unh.edu
603-862-4185
University of New Hampshire
13-Jul-2006


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