Abstract
A terrestrial biogeochemical model (CASACNP) was coupled to a land surface model (the Common Land Model, CoLM) to simulate the dynamics of carbon substrate in soil and its limitation on soil respiration. The combined model, CoLM_CASACNP, was able to predict long-term carbon sources and sinks that CoLM alone could not. The coupled model was tested using measurements of belowground respiration and surface fluxes from two forest ecosystems. The combined model simulated reasonably well the diurnal and seasonal variations of net ecosystem carbon exchange, as well as seasonal variation in the soil respiration rate of both the forest sites chosen for this study. However, the agreement between model simulations and actual measurements was poorer under dry conditions. The model should be tested against more measurements before being applied globally to investigate the feedbacks between the carbon cycle and climate change.
| Original language | English |
|---|---|
| Pages (from-to) | 1129-1142 |
| Number of pages | 14 |
| Journal | Advances in Atmospheric Sciences |
| Volume | 28 |
| Issue number | 5 |
| DOIs | |
| State | Published - Sep 2011 |
Funding
Acknowledgements. This work was supported by R&D Special Fund for Nonprofit Industry (Meteorology, GYHY200706025), the U.S. Department of Energy, Office of Science, Biological and Environmental Research. Oak Ridge National Laboratory is managed by UT-Battelle, LLC for the U.S. Department of Energy under Contract No. DE-AC05-00OR22725. We would like to acknowledge the assistance and helpful discussions from Huilin GAO. We would also like to thank two anonymous reviewers for their thorough and constructive review.
Keywords
- CoLM_CASACNP model
- carbon flux
- terrestrial carbon cycle