Full text of this article is only available in PDF format.

Jiaojun Zhu (email), Yutaka Gonda, Takeshi Matsuzaki, Masashi Yamamoto

Modeling relative wind speed by optical stratification porosity within the canopy of a coastal protective forest at different stem densities

Zhu J., Gonda Y., Matsuzaki T., Yamamoto M. (2003). Modeling relative wind speed by optical stratification porosity within the canopy of a coastal protective forest at different stem densities. Silva Fennica vol. 37 no. 2 article id 501. https://doi.org/10.14214/sf.501

Abstract

Wind speed and optical stratification porosity (OSP) were measured at various heights inside a coastal protective forest thinned to different stem densities to assess whether any characteristics of the wind profile in the coastal protective forest could be predicted from OSP. OSP was defined as vertical distribution of the proportion of sky hemisphere not obscured by tree elements inside a forest stand, and was determined for various heights using hemispherical photographic silhouettes on a computer processing system. The distribution of OSP in the coastal forest follows the Lambert-Beer’s law with an extinction coefficient (v). The relative wind speed within the canopy can be described using an exponential form with an attenuation coefficient (a). Variation in relative wind speed was very closely correlated with the distribution of OSP within the canopy. While below the canopy, i.e., in the trunk space, relative wind speed was little correlated with the distribution of OSP because the distribution of OSP was relatively constant there. Therefore, the linear relationships between relative wind speed and OSP and between the two coefficients v and a were established within the canopy. The results suggest that OSP can be used to predict the wind profile in case of the application within the canopy of the coastal forest.

Keywords
coastal protective forest; optical porosity; Pinus thunbergii; vertical forest structure; wind speed

Author Info
  • Zhu, Qingyuan Station of Forest Ecology, Institute of Applied Ecology, the Chinese Academy of Sciences, No. 72 Wenhua Road, Shenyang 110016, P.R. China; Faculty of Agriculture, Niigata University, Niigata 950-2181, Japan E-mail jiaojunzhu@iae.ac.cn (email)
  • Gonda, Faculty of Agriculture, Niigata University, Niigata 950-2181, Japan E-mail yg@nn.jp
  • Matsuzaki, Faculty of Agriculture, Niigata University, Niigata 950-2181, Japan E-mail tm@nn.jp
  • Yamamoto, Faculty of Agriculture, Niigata University, Niigata 950-2181, Japan E-mail my@nn.jp

Received 17 April 2001 Accepted 21 January 2003 Published 31 December 2003

Views 4782

Available at https://doi.org/10.14214/sf.501 | Download PDF

Creative Commons License CC BY-SA 4.0

Register
Click this link to register to Silva Fennica.
Log in
If you are a registered user, log in to save your selected articles for later access.
Contents alert
Sign up to receive alerts of new content

Your selected articles
Send to email
Fløistad I. S., Granhus A. (2013) Timing and duration of short-day treatment influ.. Silva Fennica vol. 47 no. 3 article id 1009 (remove) | Edit comment
Vauhkonen J., Matala J. et al. (2023) Future browsing damage in seedling stands accord.. Silva Fennica vol. 57 no. 2 article id 23012 (remove) | Edit comment
Gschwantner T., Schadauer K. et al. (2009) Common tree definitions for national forest inve.. Silva Fennica vol. 43 no. 2 article id 463 (remove) | Edit comment
Raatikainen M., Rossi E. et al. (1985) Methods of estimation of berry yield and berry y.. Silva Fennica vol. 19 no. 2 article id 5241 (remove) | Edit comment
Kishine T., (1986) Optimizing simulation model on forest policy. Silva Fennica vol. 20 no. 4 article id 5300 (remove) | Edit comment
Reunala A., (1975) Forest ownership changes and regional developmen.. Silva Fennica vol. 9 no. 4 article id 4926 (remove) | Edit comment
Nykänen M.-L., Broadgate M. et al. (1997) Factors affecting snow damage of trees with part.. Silva Fennica vol. 31 no. 2 article id 5618 (remove) | Edit comment
Lundgren C., (2004) Microfibril angle and density patterns of fertil.. Silva Fennica vol. 38 no. 1 article id 439 (remove) | Edit comment
Suhonen P., (1987) Forest and literature Silva Fennica vol. 21 no. 4 article id 5333 (remove) | Edit comment
Laiho O., Mikola P. (1964) Studies on the effect of some eradicants on myco.. Acta Forestalia Fennica vol. 77 no. 2 article id 7150 (remove) | Edit comment
Pöntynen V., (1931) Wood consumption of wood manufacturing industry .. Acta Forestalia Fennica vol. 37 no. 3 article id 7265 (remove) | Edit comment
Schalin I., (1966) Studies on the microfungi in the forest floor of.. Acta Forestalia Fennica vol. 81 no. 7 article id 7172 (remove) | Edit comment
Insinna P., Jalkanen R. et al. (2007) Climate impact on 100-year foliage chronologies .. Silva Fennica vol. 41 no. 4 article id 271 (remove) | Edit comment
Lähtinen K., (2007) Linking resource-based view with business econom.. Silva Fennica vol. 41 no. 1 article id 312 (remove) | Edit comment
Nuutinen Y., Väätäinen K. et al. (2010) Operational efficiency and damage to sawlogs by .. Silva Fennica vol. 44 no. 1 article id 165 (remove) | Edit comment
Siitonen J., (1990) Potential forest pest beetles conveyed to Finlan.. Silva Fennica vol. 24 no. 3 article id 5431 (remove) | Edit comment
Čermák P., Rybníček M. et al. (2017) Impact of climate change on growth dynamics of N.. Silva Fennica vol. 51 no. 2 article id 1781 (remove) | Edit comment
Palmgren K., Saarsalmi A. et al. (1985) Nitrogen fixation and biomass production in some.. Silva Fennica vol. 19 no. 4 article id 5254 (remove) | Edit comment
Rørstad P. K., Trømborg E. et al. (2010) Combining GIS and forest modelling in estimating.. Silva Fennica vol. 44 no. 3 article id 141 (remove) | Edit comment
Kniivilä M., Saastamoinen O. (2002) The opportunity costs of forest conservation in .. Silva Fennica vol. 36 no. 4 article id 526 (remove) | Edit comment
Hallikainen V., Hyppönen M. et al. (2010) Family forest owners’ opinions about forest mana.. Silva Fennica vol. 44 no. 2 article id 158 (remove) | Edit comment
Zhu J., Gonda Y. et al. (2003) Modeling relative wind speed by optical stratifi.. Silva Fennica vol. 37 no. 2 article id 501 (remove) | Edit comment
Your search results