Coupling a Terrestrial Biogeochemical Model to the Common Land Model |
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Authors: | SHI Xiaoying MAO Jiafu WANG Yingping DAI Yongjiu and TANG Xuli |
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Institution: | State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081, Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA,State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA,CSIRO Marine and Atmospheric Research, Aspendale, Victoria, Australia,Beijing Normal University,South China Botanical Garden, the Chinese Academy of Sciences, Guangzhou 510650 |
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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. |
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Keywords: | CoLM_CASACNP model terrestrial carbon cycle carbon flux |
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