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Comment
. 2011 Aug 26;333(6046):1093; author reply 1093.
doi: 10.1126/science.1199048.

Comment on "Drought-induced reduction in global terrestrial net primary production from 2000 through 2009"

Arindam Samanta  1 , Marcos H Costa, Edson L Nunes, Simone A Vieira, Liang Xu, Ranga B Myneni
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Comment

Comment on "Drought-induced reduction in global terrestrial net primary production from 2000 through 2009"

Arindam Samanta et al. Science. .

Abstract

Zhao and Running (Reports, 20 August 2010, p. 940) reported a reduction in global terrestrial net primary production (NPP) from 2000 through 2009. We argue that the small trends, regional patterns, and interannual variations that they describe are artifacts of their NPP model. Satellite observations of vegetation activity show no statistically significant changes in more than 85% of the vegetated lands south of 70°N during the same 2000 to 2009 period.

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