comparison of different methods for measuring the canopy light regime

(1) The results of measuring the radiation penetration coefficients within a young pine stand with different types of sensors are compared under clear and overcast sky conditions. (2) The results obtained are also compared to the estimates of diffuse and direct solar radiation penetration coefficien...

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Bibliographic Details
Published in:The Journal of applied ecology 1983-01, Vol.20 (3), p.897-904
Main Authors: Salminen, R, Nilson, T, Hari, P, Kaipiainen, L, Ross, J
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Biological and medical sciences
Cloud cover
Coefficients
Correlation coefficients
Forest canopy
Forest stands
forests
Fundamental and applied biological sciences. Psychology
General aspects
Irradiance
Metric photography
Photometers
Pinus sylvestris
Sensors
Spectrophotometers
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Summary:(1) The results of measuring the radiation penetration coefficients within a young pine stand with different types of sensors are compared under clear and overcast sky conditions. (2) The results obtained are also compared to the estimates of diffuse and direct solar radiation penetration coefficients calculated from fish-eye photographs made in the same stand. (3) Agreement between the calculated and measured penetration coefficients is quite good for an overcast situation. In sunshine, however, the correlation between the hourly totals of radiation measured and estimated from fish-eye photographs is considerably less than under overcast conditions.
ISSN:0021-8901
1365-2664
DOI:10.2307/2403134