Simple method to extend the range of ECO-BB for waters with high backscattering coefficient

The ECO-BB (Sea Bird Scientific) is a popular instrument used by water optics researchers to measure the backscattering coefficient of waters in the visible to near-infrared wavelengths. The ECO-BB is calibrated by default for oceanic waters where the backscattering coefficient is typically low. In...

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Published in:Applied optics (2004) 2020-11, Vol.59 (31), p.9690
Main Authors: Wong, Joel, Chin Liew, Soo, Wong, Elizabeth
Format: Article
Language:English
Subjects:
Backscattering
Calcium carbonate
Coastal waters
Coefficients
Water sampling
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Chin Liew, Soo
Wong, Elizabeth
description The ECO-BB (Sea Bird Scientific) is a popular instrument used by water optics researchers to measure the backscattering coefficient of waters in the visible to near-infrared wavelengths. The ECO-BB is calibrated by default for oceanic waters where the backscattering coefficient is typically low. In inland and coastal waters however, there is a tendency for the ECO-BB to reach saturation due to the high number of suspended particles. In the paper, a simple method is presented to extend the range of the ECO-BB instrument in such waters using a nephelometric turbidimeter. The method was first tested on powdered calcium carbonate in pure freshwater, followed by collected water samples from the Singapore Straits and the Lupar River in Sarawak. All three tests confirm the correlation between the ECO-BB and turbidimeter and show that the turbidimeter is a good proxy for backscattering coefficient measurements in turbid waters.
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source Optica Publishing Group Journals (Optical Society)
subjects Backscattering
Calcium carbonate
Coastal waters
Coefficients
Water sampling
title Simple method to extend the range of ECO-BB for waters with high backscattering coefficient
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