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Tree scale distributed multipoint measuring system of photosynthetically active radiation

Publication ,  Journal Article
Palva, L; Markkanen, T; Siivola, E; Garam, E; Linnavuo, M; Nevas, S; Manoochehri, F; Palmroth, S; Rajala, K; Ruotoistenmäki, H; Vuorivirta, T ...
Published in: Agricultural and Forest Meteorology
January 6, 2001

A tree scale distributed multipoint measuring system of photosynthetically active radiation (PAR) has been designed. The system is divided into a central unit, measuring units and sensor-amplifiers. Measurements can be carried out with a maximum number of 32 measuring units each comprising 24 sensor-amplifiers. The feasibility of the system has been demonstrated with measurements within a Scots pine canopy using a 12 m telescopic mast with horizontal cross-booms. Two sensor arrays of 4 m in length comprising about 40 sensors were divided into 10-sensor sub-arrays of 1, 2, and 4 m in length. The simultaneously measured PAR averages over the sub-arrays differed considerably from the 4 m reference arrays. The maximum difference was 100% in the case of the 1 m sub-arrays, 80% in the case of the 2 m sub-arrays and 54% in the case of the 4 m sub-arrays. When averaged over the 6 h measuring period around noon, the respective maximum differences were 27, 15 and 3%. © 2001 Elsevier Science B.V.

Duke Scholars

Published In

Agricultural and Forest Meteorology

DOI

ISSN

0168-1923

Publication Date

January 6, 2001

Volume

106

Issue

1

Start / End Page

71 / 80

Related Subject Headings

  • Meteorology & Atmospheric Sciences
  • 37 Earth sciences
  • 31 Biological sciences
  • 30 Agricultural, veterinary and food sciences
  • 07 Agricultural and Veterinary Sciences
  • 06 Biological Sciences
  • 04 Earth Sciences
 

Citation

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Palva, L., Markkanen, T., Siivola, E., Garam, E., Linnavuo, M., Nevas, S., … Sepponen, R. (2001). Tree scale distributed multipoint measuring system of photosynthetically active radiation. Agricultural and Forest Meteorology, 106(1), 71–80. https://doi.org/10.1016/S0168-1923(00)00171-4
Palva, L., T. Markkanen, E. Siivola, E. Garam, M. Linnavuo, S. Nevas, F. Manoochehri, et al. “Tree scale distributed multipoint measuring system of photosynthetically active radiation.” Agricultural and Forest Meteorology 106, no. 1 (January 6, 2001): 71–80. https://doi.org/10.1016/S0168-1923(00)00171-4.
Palva L, Markkanen T, Siivola E, Garam E, Linnavuo M, Nevas S, et al. Tree scale distributed multipoint measuring system of photosynthetically active radiation. Agricultural and Forest Meteorology. 2001 Jan 6;106(1):71–80.
Palva, L., et al. “Tree scale distributed multipoint measuring system of photosynthetically active radiation.” Agricultural and Forest Meteorology, vol. 106, no. 1, Jan. 2001, pp. 71–80. Scopus, doi:10.1016/S0168-1923(00)00171-4.
Palva L, Markkanen T, Siivola E, Garam E, Linnavuo M, Nevas S, Manoochehri F, Palmroth S, Rajala K, Ruotoistenmäki H, Vuorivirta T, Seppälä I, Vesala T, Hari P, Sepponen R. Tree scale distributed multipoint measuring system of photosynthetically active radiation. Agricultural and Forest Meteorology. 2001 Jan 6;106(1):71–80.
Journal cover image

Published In

Agricultural and Forest Meteorology

DOI

ISSN

0168-1923

Publication Date

January 6, 2001

Volume

106

Issue

1

Start / End Page

71 / 80

Related Subject Headings

  • Meteorology & Atmospheric Sciences
  • 37 Earth sciences
  • 31 Biological sciences
  • 30 Agricultural, veterinary and food sciences
  • 07 Agricultural and Veterinary Sciences
  • 06 Biological Sciences
  • 04 Earth Sciences