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Solar Radiation in Forests: Theory for Hemispherical Photography

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Hemispherical Photography in Forest Science: Theory, Methods, Applications

Part of the book series: Managing Forest Ecosystems ((MAFE,volume 28))

Abstract

Solar radiation is not only the main source of energy for life on Earth, but it is also the natural source of light for the optical acquisition of information, such as for vision and photography . Natural sunlight provides the illumination required for taking hemispherical photographs in forests. In turn, such photographs can then be interpreted to provide a description of the plant canopy and its interactions with light, or more generally, its radiation regime. The techniques used for both the acquisition and the analysis of hemispherical photographs are based on the theory of radiation in plant canopies. The goal of this chapter is to present the theoretical foundations describing how solar radiation reaches Earth’s surface and interacts with plant canopies. Different sensors for measuring radiation are described, and the principles of hemispherical photography are reviewed. Finally, a comparison of the techniques used to assess the radiation regime of forest canopies is presented.

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Acknowledgements

We thank William F.J. Parsons and Catherine A. Brown for editing the language of our manuscript.

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Authors and Affiliations

  1. Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Zürcherstr. 111, 8903, Birmensdorf, Switzerland

    Patrick Schleppi

  2. Centre for Forest Research, Université du Québec à Montréal (UQAM), P.O. Box 8888, Centre-Ville Station, Montréal, QC, H3C 3P8, Canada

    Alain Paquette

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Correspondence to Patrick Schleppi .

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  1. Centre d’Applications et de Recherches en Télédétection (CARTEL), Université de Sherbrooke, Sherbrooke, Québec, Canada

    Richard A. Fournier

  2. Canadian Forest Services, Natural Resources Canada, Edmonton, Alberta, Canada

    Ronald J. Hall

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Schleppi, P., Paquette, A. (2017). Solar Radiation in Forests: Theory for Hemispherical Photography. In: Fournier, R., Hall, R. (eds) Hemispherical Photography in Forest Science: Theory, Methods, Applications. Managing Forest Ecosystems, vol 28. Springer, Dordrecht. https://doi.org/10.1007/978-94-024-1098-3_2

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