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Carbon and nitrogen cycle dynamics in the O-CN land surface model: 2. Role of the nitrogen cycle in the historical terrestrial carbon balance.
- Source :
- Global Biogeochemical Cycles; Mar2010, Vol. 24 Issue 1, pGB1006-GB1006, 14p
- Publication Year :
- 2010
-
Abstract
- Global-scale results of the new O-CN terrestrial biosphere model coupling the carbon (C) and nitrogen (N) cycles show that the model produces realistic estimates of present- day C and N stocks and fluxes, despite some regional biases. N availability strongly affects high-latitude foliage area and foliage N, limiting vegetation productivity and present-day high-latitude net C uptake. Anthropogenic N deposition is predicted to have increased net primary productivity due to increases in foliage area and foliage N, contributing 0.2-0.5 Pg C yr<superscript>-1</superscript> to the I 990s global net C uptake. While O-CN's modeled global 1990s terrestrial net C uptake (2.4 Pg C yr<superscript>-1</superscript>) is similar to the estimate not accounting for anthropogenic N inputs and N dynamics (2.6 Pg C yr<superscript>-1</superscript>), its latitudinal distribution and the sensitivity of the terrestrial C balance to its driving factors are substantially altered by N dynamics, with important implications for future trajectories of the global carbon cycle. [ABSTRACT FROM AUTHOR]
- Subjects :
- BIOSPHERE
CARBON cycle
NITROGEN cycle
FOLIAGE plants
ANTHROPOGENIC soils
Subjects
Details
- Language :
- English
- ISSN :
- 08866236
- Volume :
- 24
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Global Biogeochemical Cycles
- Publication Type :
- Academic Journal
- Accession number :
- 50296291
- Full Text :
- https://doi.org/10.1029/2009GB003522