Comment to DOI:10.1029/2009GB003521.
Carbon and nitrogen cycle dynamics in the O-CN land surface model: 2. Role of the nitrogen cycle in the historical terrestrial carbon balance
Article first published online: 11 FEB 2010
Copyright 2010 by the American Geophysical Union.
Global Biogeochemical Cycles
Volume 24, Issue 1, March 2010
How to Cite
2010), Carbon and nitrogen cycle dynamics in the O-CN land surface model: 2. Role of the nitrogen cycle in the historical terrestrial carbon balance, Global Biogeochem. Cycles, 24, GB1006, doi:10.1029/2009GB003522., , , , , and (
- Issue published online: 11 FEB 2010
- Article first published online: 11 FEB 2010
- Manuscript Accepted: 24 AUG 2009
- Manuscript Revised: 12 AUG 2009
- Manuscript Received: 24 MAR 2009
- terrestrial carbon balance;
- terrestrial biosphere modeling;
- carbon cycle;
- nitrogen cycle;
- nitrogen deposition
 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−1 to the 1990s global net C uptake. While O-CN's modeled global 1990s terrestrial net C uptake (2.4 Pg C yr−1) is similar to the estimate not accounting for anthropogenic N inputs and N dynamics (2.6 Pg C yr−1), 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.