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The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

Strathprints serves world leading Open Access research by the University of Strathclyde, including research by the Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), where research centres such as the Industrial Biotechnology Innovation Centre (IBioIC), the Cancer Research UK Formulation Unit, SeaBioTech and the Centre for Biophotonics are based.

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Three-parameter active in situ optical measurements: theory, instrumentation, and results from coastal waters

McKee, D. and Cunningham, A. and Jones, K. (2002) Three-parameter active in situ optical measurements: theory, instrumentation, and results from coastal waters. Journal of Optics A: Pure and Applied Optics, 4 (4). S66-S70. ISSN 1464-4258

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Abstract

A submersible optical instrument has been designed and constructed which simultaneously measures chlorophyll fluorescence, beam attenuation and wide-angle light scattering in sea water. A theoretical framework is presented which shows that this instrument configuration is capable of quantitatively measuring concentrations of gelbstoff, suspended particles and phytoplankton when all three components are present in a mixture, provided the relevant set of calibration coefficients are known. The inherent variability of natural materials means that the numerical values of these calibration coefficients usually have to be determined at the site of instrument deployment. However, trials in optically complex waters indicate that the instrument can be usefully employed to interpolate between chemical measurements in order to increase the spatial and temporal coverage of survey data while minimizing the resources required for sample analysis.