Comment to DOI:10.1029/2009GB003522.
Carbon and nitrogen cycle dynamics in the O-CN land surface model: 1. Model description, site-scale evaluation, and sensitivity to parameter estimates
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: 1. Model description, site-scale evaluation, and sensitivity to parameter estimates, Global Biogeochem. Cycles, 24, GB1005, doi:10.1029/2009GB003521., and (
- Issue published online: 11 FEB 2010
- Article first published online: 11 FEB 2010
- Manuscript Accepted: 5 OCT 2009
- Manuscript Revised: 3 JUL 2009
- Manuscript Received: 24 MAR 2009
- nitrogen balance;
- carbon balance;
- terrestrial biosphere modeling;
- nitrogen deposition;
- model sensitivity;
 Nitrogen (N) availability plays a key role in terrestrial biosphere dynamics. To understand and quantify the role of terrestrial N in the Earth system, we developed an advanced terrestrial biogeochemical model O-CN that mechanistically couples terrestrial energy, water, carbon, and nitrogen fluxes in terrestrial ecosystems. We evaluate this new model against observations from intensive forest monitoring plots at temperate and boreal locations in Europe. O-CN simulates realistic foliage N concentrations and N cycling rates and reproduces observed diurnal and seasonal cycles of C fluxes as well as observed gradients in vegetation productivity with N availability for the forest sites studied. A sensitivity test reveals that these results are reasonably robust against uncertainties in model parameter estimates. Using this model we quantify the likely contribution of anthropogenic N deposition to present ecosystem C sequestration as 36 (range: 2–79) g C g−1 N in agreement with ecosystem manipulation studies.