文章基本信息

标题：Calibration of the Odyssey™ Photosynthetic Irradiance Recorder™ for absolute irradiance measures
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作者：Jared M. Shaffer ; Jake J. Beaulieu
期刊名称：Journal of Freshwater Ecology
印刷版ISSN：0270-5060
电子版ISSN：2156-6941
出版年度：2012
卷号：27
期号：4
页码：599-605
DOI：10.1080/02705060.2012.711259
出版社：Taylor & Francis
摘要：The Odyssey™ Photosynthetic Irradiance Recorder™ is an affordable photosynthetically-active radiation (PAR) meter gaining popularity among aquatic ecologists. A survey of the literature revealed that the instrument is frequently being used for absolute measures of PAR, although its design was intended for relative measures only. Unlike more expensive PAR meters, the Odyssey™ Recorder must be user calibrated. We found the suggested two-point calibration procedure could produce inaccuracies ranging from less than 1% to greater than 300%. The calibration procedure is therefore not suitable for absolute measures or for comparison studies. We recommend a revised calibration procedure that is unaffected by short-term fluctuations in solar intensity. Furthermore, this procedure yields a calibration factor and standard error. Accuracy is critical for investigations which seek to compare PAR measurements made with multiple sensors or to build quantitative relationships between processes and PAR.
关键词：calibration; irradiance recorder; methodology; PAR; photosynthesis