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Simulating carbon exchange in Canadian Boreal forests

Author

Listed:
  • Zhou, Xiaolu
  • Peng, Changhui
  • Dang, Qing-Lai
  • Sun, Jianfeng
  • Wu, Haibin
  • Hua, Dong

Abstract

This paper will discuss TRIPLEX-Flux, a process-based model that estimates net ecosystem production (NEP) as well as analyzing the level of sensitivity of the model's response by simulating CO2 flux in an existing old black spruce BOREAS site in central Canada. The research objectives were: (1) to test the TRIPLEX-Flux model simulations against flux tower measurements; and (2) to examine parameter and input variable effects on model response via sensitivity analysis. Validation of NEP data at 30min intervals derived from tower and chamber measurements showed that the NEP data from the model corresponded well with the measured NEP from the BOREAS site (R2>0.65). Sensitivity analysis demonstrated different levels of sensitivity between morning and noon periods and from the current to doubled atmospheric CO2 concentrations. Additionally, the comparison of different algorithms to calculate stomatal conductance showed that the NEP predicted by the model using the iteration algorithm was consistent with the results using a constant Ci/Ca of 0.74 for current and 0.81 for doubled CO2 concentrations. Varying parameter and input variable values by ±10% resulted in a similar model response between morning and noon periods (less than or equal to 27.6% and 27.4%, respectively). Most parameters were more sensitive at noon than they were in the morning except for those that were correlated with air temperature, suggesting that air temperature has considerable influence over model sensitivity for these parameters/variables. Air temperature effect was greater under doubled than it was under current atmospheric CO2 concentrations. In contrast, model sensitivity to CO2 decreased under doubled CO2 concentrations.

Suggested Citation

  • Zhou, Xiaolu & Peng, Changhui & Dang, Qing-Lai & Sun, Jianfeng & Wu, Haibin & Hua, Dong, 2008. "Simulating carbon exchange in Canadian Boreal forests," Ecological Modelling, Elsevier, vol. 219(3), pages 287-299.
  • Handle: RePEc:eee:ecomod:v:219:y:2008:i:3:p:287-299
    DOI: 10.1016/j.ecolmodel.2008.07.011
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    Citations

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    Cited by:

    1. Liu, Qiuyu & Peng, Changhui & Schneider, Robert & Cyr, Dominic & Liu, Zelin & Zhou, Xiaolu & Kneeshaw, Daniel, 2021. "TRIPLEX-Mortality model for simulating drought-induced tree mortality in boreal forests: Model development and evaluation," Ecological Modelling, Elsevier, vol. 455(C).
    2. Shaw, C.H. & Hilger, A.B. & Metsaranta, J. & Kurz, W.A. & Russo, G. & Eichel, F. & Stinson, G. & Smyth, C. & Filiatrault, M., 2014. "Evaluation of simulated estimates of forest ecosystem carbon stocks using ground plot data from Canada's National Forest Inventory," Ecological Modelling, Elsevier, vol. 272(C), pages 323-347.
    3. Podur, Justin & Wotton, Michael, 2010. "Will climate change overwhelm fire management capacity?," Ecological Modelling, Elsevier, vol. 221(9), pages 1301-1309.
    4. Wen, Xuding & Zhao, Zhonghui & Deng, Xiangwen & Xiang, Wenhua & Tian, Dalun & Yan, Wende & Zhou, Xiaolu & Peng, Changhui, 2014. "Applying an artificial neural network to simulate and predict Chinese fir (Cunninghamia lanceolata) plantation carbon flux in subtropical China," Ecological Modelling, Elsevier, vol. 294(C), pages 19-26.
    5. Wang, Z. & Grant, R.F. & Arain, M.A. & Bernier, P.Y. & Chen, B. & Chen, J.M. & Govind, A. & Guindon, L. & Kurz, W.A. & Peng, C. & Price, D.T. & Stinson, G. & Sun, J. & Trofymowe, J.A. & Yeluripati, J., 2013. "Incorporating weather sensitivity in inventory-based estimates of boreal forest productivity: A meta-analysis of process model results," Ecological Modelling, Elsevier, vol. 260(C), pages 25-35.
    6. Zhang, Minxia & Chen, Shulin & Jiang, Hong & Peng, Changhui & Zhang, Jinmeng & Zhou, Guomo, 2020. "The impact of intensive management on net ecosystem productivity and net primary productivity of a Lei bamboo forest," Ecological Modelling, Elsevier, vol. 435(C).
    7. Wang, Weifeng & Peng, Changhui & Zhang, S.Y. & Zhou, Xiaolu & Larocque, Guy R. & Kneeshaw, Daniel D. & Lei, Xiangdong, 2011. "Development of TRIPLEX-Management model for simulating the response of forest growth to pre-commercial thinning," Ecological Modelling, Elsevier, vol. 222(14), pages 2249-2261.

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