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Tue Nov 13, 2012, 10:36 PM

Plants and soils could exacerbate climate change as global climate warms

http://www.eurekalert.org/pub_releases/2012-11/ams-pas111312.php
Public release date: 13-Nov-2012

Contact: Ellen Klicka
eklicka@ametsoc.org
202-355-9812
American Meteorological Society

Plants and soils could exacerbate climate change as global climate warms

WASHINGTON November 13, 2012 Scientists from the American Meteorological Society (AMS) and University of California, Berkeley have demonstrated that plants and soils could release large amounts of carbon dioxide as global climate warms. This finding contrasts with the expectation that plants and soils will absorb carbon dioxide and is important because that additional carbon release from land surface could be a potent positive feedback that exacerbates climate warming.

The study was published today in a Journal of Climate paper titled, "Carbon cycle uncertainty increases climate change risks and mitigation challenges." The full text is available at http://journals.ametsoc.org/doi/full/10.1175/JCLI-D-12-00089.1.

"We have been counting on plants and soils to soak up and store much of the carbon we're releasing when we burn fossil fuels," Paul Higgins, a study co-author and associate director of the AMS Policy Program, said. "However, our results suggest the opposite possibility. Plants and soils could react to warming by releasing additional carbon dioxide, increasing greenhouse gas concentrations and leading to even more climate warming."

The research team used a computer model of Earth's land surface to examine how carbon storage might react to a warmer planet with higher atmospheric carbon dioxide concentrations. The experimental design helps quantify the possible range in future terrestrial carbon storage.


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