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Press Release 13-123

Changing Atmosphere Affects How Much Water Trees Need

Increasing levels of atmospheric carbon dioxide alter how plants use water

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Image of forest canopy as seen from a Michigan eddy-covariance tower

Above the forest canopy: looking down at the trees from a Michigan eddy-covariance tower.

Credit: Chris Vogel


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Tree leaves changing color as seen from the eddy-covariance tower.

Summer turns to fall: another view over the forest from the eddy-covariance tower.

Credit: Chris Vogel


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Image of a sonic aerometer close to a forest

A sonic aerometer for monitoring gas exchange between the forest and the atmosphere.

Credit: Chris Vogel


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Trees as seen from the top of an eddy-covariance tower in Maine.

View from the top of an eddy-covariance tower of a boreal forest in Maine.

Credit: David Hollinger


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Fallen trees in the Harvard Forest

On the ground: looking into Harvard Forest's trees from a less lofty perch.

Credit: NSF Harvard Forest LTER Site


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