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Effects of canopy architectural parameterizations on the modeling of radiative transfer mechanism

Author

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  • Govind, Ajit
  • Guyon, Dominique
  • Roujean, Jean-Louis
  • Yauschew-Raguenes, Nathalie
  • Kumari, Jyothi
  • Pisek, Jan
  • Wigneron, Jean-Pierre

Abstract

In most of the ecological models, simplified methods are still being used to describe the canopy radiative transfer mechanism (CRTM). Largest uncertainties in the conceptualization of CRTM lies in the adequate description of the two main canopy architectural parameters: (1) the projection function (G) that describes the foliage inclination distribution in space and (2) the clumping function (Ω) that describes the aggregative nature of canopy elements. Herein, we explore the effects of different (simple to complex) representations of the G and Ω functions on simulations of photosynthetically active radiation (PAR) transmitted through a middle-aged maritime pine canopy, using a scenario-based numerical experiment.

Suggested Citation

  • Govind, Ajit & Guyon, Dominique & Roujean, Jean-Louis & Yauschew-Raguenes, Nathalie & Kumari, Jyothi & Pisek, Jan & Wigneron, Jean-Pierre, 2013. "Effects of canopy architectural parameterizations on the modeling of radiative transfer mechanism," Ecological Modelling, Elsevier, vol. 251(C), pages 114-126.
  • Handle: RePEc:eee:ecomod:v:251:y:2013:i:c:p:114-126
    DOI: 10.1016/j.ecolmodel.2012.11.014
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    Cited by:

    1. Govind, Ajit & Cowling, Sharon & Kumari, Jyothi & Rajan, Nithya & Al-Yaari, Amen, 2015. "Distributed modeling of ecohydrological processes at high spatial resolution over a landscape having patches of managed forest stands and crop fields in SW Europe," Ecological Modelling, Elsevier, vol. 297(C), pages 126-140.

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