Title

Drought-Induced Reduction in Global Terrestrial Net Primary Production from 2000 Through 2009

Document Type

Article

Publication Title

Science

Publication Date

8-2010

Volume

329

Issue

5994

First Page

940

Last Page

943

Abstract

Terrestrial net primary production (NPP) quantifies the amount of atmospheric carbon fixed by plants and accumulated as biomass. Previous studies have shown that climate constraints were relaxing with increasing temperature and solar radiation, allowing an upward trend in NPP from 1982 through 1999. The past decade (2000 to 2009) has been the warmest since instrumental measurements began, which could imply continued increases in NPP; however, our estimates suggest a reduction in the global NPP of 0.55 petagrams of carbon. Large-scale droughts have reduced regional NPP, and a drying trend in the Southern Hemisphere has decreased NPP in that area, counteracting the increased NPP over the Northern Hemisphere. A continued decline in NPP would not only weaken the terrestrial carbon sink, but it would also intensify future competition between food demand and proposed biofuel production.

DOI

http://dx.doi.org/10.1126/science.1192666

Rights

© 2010 American Association for the Advancement of Science

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