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Nature 447, 781-782 (14 June 2007) | doi:10.1038/447781a; Published online 13 June 2007

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Environmental science: Nitrogen impacts on forest carbon

Peter Högberg1

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Does the extra nitrogen input from anthropogenic sources mean that more carbon from the atmosphere is being locked up in boreal and temperate forests? 'Yes' is the answer to emerge from the latest analysis.

Since the Industrial Revolution kicked into gear, at around the beginning of the nineteenth century, the atmospheric concentration of carbon dioxide has increased from 280 to 380 parts per million1. Starting a century later, there has been an even more dramatic increase in the industrial fixation of atmospheric nitrogen into agricultural fertilizers, and in the production of nitrogen oxides from combustion processes in vehicles and industry.

  1. Peter Högberg is in the Department of Forest Ecology and Management, SLU — Swedish University of Agricultural Sciences, SE-901 83 Umeå, Sweden.
    Email: peter.hogberg@sek.slu.se

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