Evaluation of terrestrial carbon cycle models with atmospheric CO2  measurements: Results from transient simulations considering increasing CO2, climate, and land-use effects

R.J. Dargaville; Martin Heimann; A. D. McGuire; I.C. Prentice; D. W. Kicklighter; F. Joos; Joy S. Clein; G. Esser; J. Foley; J. Kaplan; R.A. Meier; J. M. Melillo; B. Moore III; N. Ramankutty; T. Reichenau; A. Schloss; S. Sitch; H. Tian; L.J. Williams; U. Wittenberg

doi:10.1029/2001GB001426

Evaluation of terrestrial carbon cycle models with atmospheric CO2 measurements: Results from transient simulations considering increasing CO2, climate, and land-use effects

Global Biogeochemical Cycles

By: R.J. Dargaville, Martin Heimann, A. D. McGuire, I.C. Prentice, D. W. Kicklighter, F. Joos, Joy S. Clein, G. Esser, J. Foley, J. Kaplan, R.A. Meier, J. M. Melillo, B. Moore III, N. Ramankutty, T. Reichenau, A. Schloss, S. Sitch, H. Tian, L.J. Williams, and U. Wittenberg

https://doi.org/10.1029/2001GB001426

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Abstract

An atmospheric transport model and observations of atmospheric CO₂ are used to evaluate the performance of four Terrestrial Carbon Models (TCMs) in simulating the seasonal dynamics and interannual variability of atmospheric CO₂ between 1980 and 1991. The TCMs were forced with time varying atmospheric CO₂ concentrations, climate, and land use to simulate the net exchange of carbon between the terrestrial biosphere and the atmosphere. The monthly surface CO₂ fluxes from the TCMs were used to drive the Model of Atmospheric Transport and Chemistry and the simulated seasonal cycles and concentration anomalies are compared with observations from several stations in the CMDL network. The TCMs underestimate the amplitude of the seasonal cycle and tend to simulate too early an uptake of CO₂ during the spring by approximately one to two months. The model fluxes show an increase in amplitude as a result of land-use change, but that pattern is not so evident in the simulated atmospheric amplitudes, and the different models suggest different causes for the amplitude increase (i.e., CO₂ fertilization, climate variability or land use change). The comparison of the modeled concentration anomalies with the observed anomalies indicates that either the TCMs underestimate interannual variability in the exchange of CO₂ between the terrestrial biosphere and the atmosphere, or that either the variability in the ocean fluxes or the atmospheric transport may be key factors in the atmospheric interannual variability.

Additional publication details
Publication type	Article
Publication Subtype	Journal Article
Title	Evaluation of terrestrial carbon cycle models with atmospheric CO2 measurements: Results from transient simulations considering increasing CO2, climate, and land-use effects
Series title	Global Biogeochemical Cycles
DOI	10.1029/2001GB001426
Volume	16
Issue	4
Year Published	2002
Language	English
Publisher	Wiley
Contributing office(s)	Alaska Cooperative Fish and Wildlife Research Unit
Description	15 p.
First page	39-1
Last page	39-15
Google Analytic Metrics	Metrics page