WARM springs cause trees to increase their take-up of carbon, complicating
efforts to determine the link between climate change and the carbon cycle. A new
study of a deciduous forest in Canada shows that it takes up more carbon in
years with warm springs, says Andy Black of the University of British Columbia.
The average annual temperature has little impact, but the earlier trees come
into leaf, and the warmer the weather, the more carbon they take up
(Geophysical Research Letters, vol 27, p 1271).
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