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Nature 440, 1120-1121 (27 April 2006) | doi:10.1038/4401120a; Published online 26 April 2006

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Palaeoclimatology: The woods fill up with snow

Michael N. Evans1

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Palaeoclimatological evidence covering the past millennium suggests that the global water cycle has changed in the past century. Agreement with climate models points to human activity as the main cause.

Two principal uncertainties in predicting climate change are the net effect of water in the climate system and the way in which water will be redistributed over the surface of the planet1. On page 1179 of this issue, Treydte et al.2 present a reconstruction of precipitation in central Asia for 826–1998 AD, developed from tree-ring data.

  1. Michael N. Evans is in the Laboratory of Tree-Ring Research, University of Arizona, 105 West Stadium, Tucson, Arizona 85721, USA.
    Email: mevans@ltrr.arizona.edu

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