@article {7509, title = { The use of wide-band transmittance imaging to size and classify suspended particulate matter in seawater }, journal = {Marine Pollution Bulletin}, year = {2017}, abstract = { An in situ particle imaging system for measurement of high concentrations of suspended particles ranging from 30 lm to several mm in diameter, is presented. The system obtains quasi-silhouettes of particles suspended within an open-path sample volume of up to 5 cm in length. Benchmarking against spherical standards and the LISST-100 show good agreement, providing confidence in measurements from the system when extending beyond the size, concentration and particle classification capabilities of the LISST-100. Particle-specific transmittance is used to classify particle type, independent of size and shape. This is applied to mixtures of oil droplets, gas bubbles and oil-coated gas bubbles, to provide independent measures of oil and gas size distributions, concentrations, and oil-gas ratios during simulated subsea releases. The system is also applied to in situ measurements of high concentrations of large mineral flocs surrounding a submarine mine tailings placement within a Norwegian Fjord. }, url = {http://ac.els-cdn.com/S0025326X16309833/1-s2.0-S0025326X16309833-main.pdf?_tid=becae57c-c2eb-11e6-90a8-00000aacb362\&acdnat=1481823025_4586c743a649bca1f075772708f17737}, author = {Davies, E. J. and Brandvik, P.J. and Leirvik, F and Nepstad, R.} }