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Carbon and nitrogen cycle dynamics in the O‐CN land surface model: 1. Model description, site‐scale evaluation, and sensitivity to parameter estimates

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Zaehle, S., Friend, A. D.·2010·Global Biogeochemical Cycles

Abstract

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.

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Metadata

Authors
Zaehle, S., & Friend, A. D.
Venue
Global Biogeochemical Cycles
Published
2010-02-11
Volume
24
Issue
1
ISSN
  • 0886-6236 (ISSN-L)
  • 1944-9224
OpenAlex
W2105306246
Cited by
554
References
3
FWCI
36.94
Type
journal article
Language
en
Open access
bronze

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Zaehle, S., & Friend, A. D. (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 Biogeochemical Cycles. https://doi.org/10.1029/2009gb003521

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