Shoot scattering phase function for Scots pine and its effect on canopy reflectance

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dc.contributor University of Helsinki, Department of Geosciences and Geography en
dc.contributor University of Helsinki, Department of Forest Sciences en Mõttus, Matti Rautiainen, Miina Schaepman, Michael E. 2012-07-27T13:10:03Z 2012-07-27T13:10:03Z 2012
dc.identifier.citation Mõttus , M , Rautiainen , M & Schaepman , M E 2012 , ' Shoot scattering phase function for Scots pine and its effect on canopy reflectance ' Agricultural and Forest Meteorology , vol 154-155 , pp. 67-74 . DOI: 10.1016/j.agrformet.2011.10.012 en
dc.identifier.issn 0168-1923
dc.identifier.other PURE: 22971352
dc.identifier.other PURE UUID: 6a150436-ac44-4b42-b1e2-b118e5617388
dc.identifier.other WOS: 000300923900008
dc.identifier.other Scopus: 84856579492
dc.description.abstract Spectral and directional reflectance properties of coniferous forests are known to differ from those of broadleaf forests. Many reasons have been proposed for this, including differences in the optical properties of leaves and shoots, the latter being considered the basic unit in radiative transfer modeling of a coniferous canopy. Unfortunately, very little empirical data is available on the spectrodirectional scattering properties of shoots. Here, we present results of angular measurements (using an ASD FieldSpec 3 spectroradiometer mounted on LAGOS) of ten Scots pine shoots in the spectral range 400--2000 nm. The shoots were found to scatter anisotropically with most of the radiation reflected back into the hemisphere where the radiation source was positioned. To describe the measured directional scattering pattern, we propose a phase function consisting of isotropic and Lambertian scattering components. Next, we used the proposed scattering phase function in a Monte Carlo radiative transfer model. Angular reflectance of a modeled horizontally homogeneous shoot canopy has, due to shoot scattering anisotropy, an enhanced “dark spot” as compared with a canopy composed of isotropic scatterers and a quantitatively similar leaf canopy. en
dc.format.extent 8
dc.language.iso eng
dc.relation.ispartof Agricultural and Forest Meteorology
dc.rights en
dc.subject Radiative transfer in vegetation canopy en
dc.subject Pinus sylvestris en
dc.subject Scattering phase function en
dc.subject dark spot en
dc.subject NEEDLES en
dc.subject LEAVES en
dc.subject MODELS en
dc.subject INDEX en
dc.subject STAND en
dc.subject 4112 Forestry en
dc.title Shoot scattering phase function for Scots pine and its effect on canopy reflectance en
dc.type Article
dc.description.version Peer reviewed
dc.type.uri info:eu-repo/semantics/other
dc.type.uri info:eu-repo/semantics/acceptedVersion

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