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Nitrogen cycling drives a strong within-soil CO2-sink
Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Ecology and Environmental Science.
Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Ecology and Environmental Science.
2008 (English)In: Tellus. Series B, Chemical and physical meteorology, ISSN 0280-6509, E-ISSN 1600-0889, Vol. 60, no 5, 782-786 p.Article in journal (Refereed) Published
Abstract [en]

For about three decades, it has not been possible to completely balance global carbon emissions into known pools. A residual (or 'missing') sink remains. Here evidence is presented that part of soil respiration is allocated into an internal soil CO2-sink localized to the saprophytic subsystem (roots excluded). The process occurs in forest, agricultural and grassland soils and is favoured by high N-deposition. Chemoautotrophic nitrification has a key role, and the most efficient internal CO2-sequestration occurs concurrently with lowest soil nitrate (NO3-) concentrations, despite considerable N-loading. Not until drastic N-supply occurs, does the CO2-sink successively breakdown, and nitrate concentrations increase, leading to NO3--leaching. Within-soil CO2-uptake seems to be of the same magnitude as the missing carbon sink. It may be gradually enforced by the ongoing input of nitrogen to the biosphere.

Place, publisher, year, edition, pages
Oxford: Wiley-Blackwell , 2008. Vol. 60, no 5, 782-786 p.
Keyword [en]
agricultural soil, carbon emission, carbon sequestration, carbon sink, leaching, nitrification, nitrogen cycle, soil carbon, soil nitrogen, soil respiration
National Category
Environmental Sciences
Identifiers
URN: urn:nbn:se:hh:diva-2150DOI: 10.1111/j.1600-0889.2008.00374.xISI: 000260140600008Scopus ID: 2-s2.0-54449084998Local ID: 2082/2545OAI: oai:DiVA.org:hh-2150DiVA: diva2:239368
Available from: 2008-11-20 Created: 2008-11-20 Last updated: 2014-09-02Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
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More styles
Language
  • de-DE
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  • Other locale
More languages
Output format
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