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|Title:||Carbon and Nitrogen Cycle Dynamics in the O-CN Land Surface Model, II: The Role of the Nitrogen Cycle in the Historic Terrestrial C Balance|
|Authors:||ZAEHLE Soehnke; FRIEND A.d; FRIEDLINGSTEIN P; DENTENER Franciscus; PEYLIN P; SCHULZ M.|
|Citation:||GLOBAL BIOGEOCHEMICAL CYCLES vol. 24 p. GB1006|
|Publisher:||AMER GEOPHYSICAL UNION|
|JRC Publication N°:||JRC51697|
|Type:||Articles in Journals|
|Abstract:||Global-scale results of the new O-CN terrestrial biosphere model coupling the carbon (C) and 3nitrogen (N) cycles show that the model produces realistic estimates of present-day terrestrial C and N stocks and fluxes. 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 small increases in foliage area and foliage N, contributing 0.2-0.5 Pg C a-1 to the 1990s global net C uptake. While O-CN¿s modelled global 1990s terrestrial net C uptake (2.4 Pg C a-1) is similar to the estimate not accounting for anthropogenic N inputs and N dynamics (2.6 Pg C a-1), its latitudinal distribution and the sensitivity of the terrestrial C balance to its driving factors are substantially altered by the N cycle, with important implications for future trajectories of the global carbon cycle.|
|JRC Institute:||Institute for Environment and Sustainability|
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