Advances in Atmospheric Sciences

, Volume 24, Issue 2, pp 311–322

Improvements of a dynamic global vegetation model and simulations of carbon and water at an upland-oak forest

  • Mao Jiafu  (毛嘉富)
  • Wang Bin  (王斌)
  • Dai Yongjiu  (戴永久)
  • F. I. Woodward
  • P. J. Hanson
  • M. R. Lomas


The interest in the development and improvement of dynamic global vegetation models (DGVMs), which have the potential to simulate fluxes of carbon, water and nitrogen, along with changes in the vegetation dynamics, within an integrated system, has been increasing. In this paper, some numerical schemes and a higher resolution soil texture dataset were employed to improve the Sheffield dynamic Global Vegetation Model (SDGVM). Using eddy covariance-based measurements, we then tested the standard version of the SDGVM and the modified version of the SDGVM. Detailed observations of daily carbon and water fluxes made at the upland oak forest on the Walker Branch Watershed in Tennessee, USA offered a unique opportunity for these comparisons. The results revealed that the modified version of the SDGVM did a reasonable job of simulating the carbon and water flux and the variation of soil water content (SWC). However, at the end of the growing season, it failed to simulate the effect of the limitations on the soil respiration dynamics and as a result underestimated this respiration. It was also noted that the modified version overestimated the increase in the SWC following summer rainfall, which was attributed to an inadequate representation of the ground water and thermal cycle.

Key words

dynamic global vegetation models terrestrial carbon and water fluxes Eddy covariance calibration 


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Copyright information

© Science Press 2007

Authors and Affiliations

  • Mao Jiafu  (毛嘉富)
    • 1
    • 2
  • Wang Bin  (王斌)
    • 1
  • Dai Yongjiu  (戴永久)
    • 3
  • F. I. Woodward
    • 4
  • P. J. Hanson
    • 5
  • M. R. Lomas
    • 4
  1. 1.State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina
  2. 2.Graduate University of the Chinese Academy of SciencesBeijingChina
  3. 3.School of GeographyBeijing Normal UniversityBeijingChina
  4. 4.Centre for Terrestrial Carbon Dynamics and Department of Animal and Plant SciencesUniversity of SheffieldUK
  5. 5.Environmental Sciences DivisionOak Ridge National LaboratoryOak RidgeUSA

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