Presentation of the optical sensor OPTISENS designed for Eulerian measurements of phytoplankton on a moored buoy

Zsolt Volent; Geir Johnsen

doi:10.1117/12.165500

10 December 1993 Presentation of the optical sensor OPTISENS designed for Eulerian measurements of phytoplankton on a moored buoy

Zsolt Volent, Geir Johnsen

Author Affiliations +

Proceedings Volume 2048, Underwater Light Measurements; (1993) https://doi.org/10.1117/12.165500
Event: High Latitude Optics, 1993, Tromso, Norway

Abstract

Since 1988 a newly designed transmissometer (OPTISENS) has been used along the southern Norwegian coast to monitor phytoplankton blooms. The instrument has been suspended on a buoy equipped with an ARGOS PTT for satellite transmission of data. The OPTISENS is a light beam transmissometer with 3 different colors of the light, i.e. red, green and blue with peak wavelengths at 650 nm, 555 nm and 470 nm, respectively. Long-term measurements in the sea and laboratory experiments of in vivo absorption- and fluorescence excitation spectra, have demonstrated that it not only can distinguish between different particles but also identify of different groups of bloom-forming phytoplankton, some of which are toxic. The attenuation coefficient ratios between the colors blue, green, yellow and red will be discussed for different phytoplankton groups.

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Zsolt Volent and Geir Johnsen "Presentation of the optical sensor OPTISENS designed for Eulerian measurements of phytoplankton on a moored buoy", Proc. SPIE 2048, Underwater Light Measurements, (10 December 1993); https://doi.org/10.1117/12.165500

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