Simultaneous assessment of photosynthetically active and ultraviolet solar radiation

• Published in: Agricultural and forest meteorology Vol. 92; no. 2; pp. 97 - 103
• Main Authors: Parisi, A.V, Wong, J.C.F, Randall, C
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 31.07.1998; Oxford Elsevier; New York, NY
• Subjects: Agricultural and forest climatology and meteorology. Irrigation. Drainage; Agricultural and forest meteorology; Agronomy. Soil science and plant productions; Animal, plant and microbial ecology; Biological and medical sciences; CANOPY; COUVERT; CUBIERTA DE COPAS; FOTOSINTESIS; Fundamental and applied biological sciences. Psychology; General agronomy. Plant production; General aspects. Techniques; Generalities, techniques; Generalities. Techniques. Climatology. Meteorology. Climatic models of plant production; Methods and techniques (sampling, tagging, trapping, modelling...); PAR; PHOTOSYNTHESE; PHOTOSYNTHESIS; Photosynthetically active radiation; RADIACION SOLAR; RADIACION ULTRAVIOLETA; RADIATION SOLAIRE; RAYONNEMENT ULTRAVIOLET; SOLAR RADIATION; Ultraviolet; ULTRAVIOLET RADIATION; PAR; UV; Photosynthetically active radiation; Ultraviolet; Solar radiation; Biometeorology; Film dosimeter; Optics; Irradiance; Petunia; Dicotyledones; Angiospermae; Solanaceae; Photographic dosimeter; Dosimetry; Instruments; Photosynthetic photon flux density; Biophysics; Experimental study; Measurement in situ; Ultraviolet radiation; Detector; Simultaneous measurement; Metrology; Agrometeorology; Spermatophyta; Portable equipment; Canopy(vegetation)
• ISSN: 0168-1923; 1873-2240
• DOI: 10.1016/S0168-1923(98)00094-X

A new dosimetric package for assessing solar radiation affecting photosynthesis in the visible and ultraviolet wavebands in plant canopies has been developed and tested. The package consists of several detectors sensitive to various wavebands between 290 and 700 nm. For photosynthetically active radiation (PAR), the dosimeter was calibrated for exposures in terms of photosynthetically active photons between 0.003 mol m −2 and 0.38 mol m −2. The package allows simultaneous assessment of the irradiances across the visible and ultraviolet wavebands. Over a plant canopy, the biologically effective ultraviolet radiation varied by approximately a factor of 2 compared to a variation by approximately a factor of 14 in the photosynthetic photon flux density.