Article
 

Automated reconstruction of tree and canopy structure for modeling the internal canopy radiation regime

Público Deposited

Contenido Descargable

Descargar PDF
https://ir.library.oregonstate.edu/concern/articles/2v23vt90v

Descriptions

Attribute NameValues
Creator
Abstract
  • Understanding canopy radiation regimes is critical to successfully modeling vegetation growth and function. For instance, the vertical distribution of photosynthetically active radiation (PAR) affects vegetation growth, informative upon carbon and energy cycling. Availing upon advances in information capture and computing power, geometrically explicit modeling of forest structure becomes increasingly possible. A primary challenge however is acquiring the forest mensuration data required to parameterize these models and the related automation of modeling forest structure. In this research, to address these issues we employ a novel and automated approach that capitalizes upon the rich information afforded by ground-based laser scanning technology. The method is implemented in two steps: in the first step, geometric explicit models of canopy structure are created from the ground-based laser scanning data. These geometric explicit models are used to simulate the vertical range to first hit. In the second step, we derive canopy gap probability from full waveform laser scanning data which have been used in a number of studies for characterization of radiation transmission (Jupp et al., 2009; Yang et al., 2010) and do not require any geometric explicit modeling. The radiative consistency of the geometric explicit models from step 1 is validated against the gap probabilities of step 2. The results show a strong relationship between the radiative transmission properties of the geometric models and canopy gap probabilities at plot level (R = 0.91 to 0.97), while the geometric models suggest the additional benefit to serve as a bridge in scaling between shoot level and canopy level radiation.
  • Keywords: Laser scanning, Explicit geometric, Ray tracing, Canopy structure, Modeling, Photosynthetically active radiation
Resource Type
DOI
Fecha Disponible
Fecha de Emisión
Citation
  • van Leeuwen, M., Coops, N., Hilker, T., Wulder, M., Newnham, G., & Culvenor, D. (2013). Automated reconstruction of tree and canopy structure for modeling the internal canopy radiation regime. Remote Sensing of Environment, 136, 286-300. doi:10.1016/j.rse.2013.04.019
Journal Title
Journal Volume
  • 136
Academic Affiliation
Declaración de derechos
Funding Statement (additional comments about funding)
  • Parts of this research are funded by an NSERC Discovery grant to Dr. Coops. Additional funding was received from the Government of Canada through the Lodgepole Pine Partnership Project funded by the Canadian Forest Service and the Canadian Wood Fibre Centre.
Publisher
Peer Reviewed
Language
Replaces

Relaciones

Parents:

This work has no parents.

Elementos

Miniatura Título Fecha de subida Visibilidad Acciones
file details HilkerThomasForestryAutomatedReconstructionTree.pdf 2017-07-06 Público Descargar