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

Joel Wong; Joel Wong; Soo Chin Liew; Elizabeth Wong

doi:10.1364/AO.405227

Applied Optics
Vol. 59,
Issue 31,
pp. 9690-9697
(2020)
•https://doi.org/10.1364/AO.405227

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

Joel Wong, Soo Chin Liew, and Elizabeth Wong

Not Accessible

Your library or personal account may give you access

Get PDF
Email
Share
Get Citation
Copy Citation Text
Joel Wong, Soo Chin Liew, and Elizabeth Wong, "Simple method to extend the range of ECO-BB for waters with high backscattering coefficient," Appl. Opt. 59, 9690-9697 (2020)

Export Citation
- BibTex
- Endnote (RIS)
- HTML
- Plain Text
Citation alert
Save article

Check for updates

Abstract

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.

Full Article | PDF Article

More Like This

Variability of relationship between the volume scattering function at 180° and the backscattering coefficient for aquatic particles

Lianbo Hu, Xiaodong Zhang, Yuanheng Xiong, Deric J. Gray, and Ming-Xia He
Appl. Opt. 59(10) C31-C41 (2020)

Improved correction methods for field measurements of particulate light backscattering in turbid waters

David Doxaran, Edouard Leymarie, Bouchra Nechad, Ana Dogliotti, Kevin Ruddick, Pierre Gernez, and Els Knaeps
Opt. Express 24(4) 3615-3637 (2016)

Instrumentation to measure the backscattering coefficient b_b for arbitrary phase functions

David Haubrich, Joe Musser, and Edward S. Fry
Appl. Opt. 50(21) 4134-4147 (2011)

Previous Article Next Article

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (5)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (7)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Location	Coordinates	Collection date	$T_{N}$ (NTU)
Singapore Straits, Singapore	$1^{\circ} 17^{'} 45^{''} N$ $103^{\circ} 45^{'} 33^{''} E$	13th September 2019	340
Lupar River, Sarawak, Malaysia	$1^{\circ} 30^{'} 46^{''} N$ $110^{\circ} 59^{'} 52^{''} E$	25th October 2019	360

$T_{N}$ Value (NTU)	Accuracy
0–500	$\pm 2 %$ of reading $\pm 1$ digit
501–800	$\pm 3 %$ of reading $\pm 1$ digit

Wavelength (nm)	$k_{λ}$ ( $m^{- 1} {N T U}^{- 1}$ )	Std. Error ( $m^{- 1} {N T U}^{- 1}$ )	$R^{2}$ , $b_{b p}$ on $T_{N}$	RMSE ( $m^{- 1}$ )	$R^{2}$ , $b_{b p}$ on mass conc.
412	0.0098	0.0002	0.99	0.012	0.99
440	0.0113	0.0002	0.98	0.014	0.99
488	0.0092	0.0002	0.99	0.011	0.99
510	0.0093	0.0002	0.97	0.012	0.97
532	0.0086	0.0002	0.99	0.009	0.99
595	0.0064	0.0001	0.99	0.005	0.99
650	0.0079	0.0002	0.98	0.005	0.98
676	0.0078	0.0003	0.98	0.005	0.97
715	0.0077	0.0003	0.97	0.005	0.97

Wavelength (nm)	$k_{λ}$ ( $m^{- 1} {N T U}^{- 1}$ )	Std. Error ( $m^{- 1} {N T U}^{- 1}$ )	$R^{2}$	RMSE ( $m^{- 1}$ )
412	0.0354	0.0003	0.99	0.008
440	0.0316	0.0003	0.99	0.007
488	0.0220	0.0003	0.99	0.007
510	0.0223	0.0002	0.99	0.005
532	0.0209	0.0003	0.99	0.007
595	0.0144	0.0002	0.99	0.004
650	0.0168	0.0002	0.99	0.003
676	0.0145	0.0002	0.99	0.003
715	0.0146	0.0002	0.99	0.003

Wavelength (nm)	$k_{λ}$ ( $m^{- 1} {N T U}^{- 1}$ )	Std. Error ( $m^{- 1} {N T U}^{- 1}$ )	$R^{2}$	RMSE ( $m^{- 1}$ )
412	0.0141	0.0002	0.99	0.006
440	0.0189	0.0003	0.99	0.009
488	0.0143	0.0002	0.99	0.006
510	0.0151	0.0002	0.99	0.006
532	0.0147	0.0003	0.99	0.009
595	0.0088	0.0002	0.99	0.004
650	0.0127	0.0003	0.99	0.004
676	0.0115	0.0003	0.99	0.004
715	0.0120	0.0003	0.98	0.004

Abstract

Cited By

Figures (7)

Tables (5)

Equations (7)

Applied Optics