Uncertainties associated to measurements of inherent optical properties in natural waters

Edouard Leymarie; David Doxaran; Marcel Babin

doi:10.1364/AO.49.005415

Uncertainties associated to measurements of inherent optical properties in natural waters

Edouard Leymarie, David Doxaran, and Marcel Babin

Applied Optics
Vol. 49,
Issue 28,
pp. 5415-5436
(2010)
•https://doi.org/10.1364/AO.49.005415

Get Citation
Copy Citation Text
Edouard Leymarie, David Doxaran, and Marcel Babin, "Uncertainties associated to measurements of inherent optical properties in natural waters," Appl. Opt. 49, 5415-5436 (2010)

Export Citation
- BibTex
- Endnote (RIS)
- HTML
- Plain Text
Get PDF (2412 KB)
Set citation alerts
Save article

Related Topics
Table of Contents Category
- Atmospheric and Oceanic Optics
Optics & Photonics Topics
?

The topics in this list come from the OSA Optics and Photonics Topics applied to this article.
Previously assigned OCIS codes
- Oceanic optics (010.4450)
- Spectrometers and spectroscopic instrumentation (120.6200)

About this Article
History
- Original Manuscript: April 5, 2010
- Revised Manuscript: July 23, 2010
- Manuscript Accepted: August 10, 2010
- Published: September 28, 2010
Virtual Issues
Virtual Journal for Biomedical Optics Vol. 5, Iss. 14

Not Accessible

Your account may give you access

Abstract

Monte Carlo simulations are used to explain and quantify the errors in inherent optical properties (IOPs) (absorption and attenuation coefficients) measured using the WET Labs AC-9 submarine spectrophotometer, and to assess correction algorithms. Simulated samples with a wide range of IOPs encountered in natural waters are examined. The relative errors on the measured absorption coefficient are in general lower than 25%, but reach up to 100% in highly scattering waters. Relative errors on attenuation and scattering coefficients are more stable, with an underestimation mainly driven by the volume scattering function. The errors in attenuation and scattering spectral shapes are small.

Full Article | PDF Article

OSA Recommended Articles

Optical closure in marine waters from in situ inherent optical property measurements

Ina Lefering, Fethi Bengil, Charles Trees, Rüdiger Röttgers, David Bowers, Alex Nimmo-Smith, Jill Schwarz, and David McKee
Opt. Express 24(13) 14036-14052 (2016)

Closure and uncertainty assessment for ocean color reflectance using measured volume scattering functions and reflective tube absorption coefficients with novel correction for scattering

Alberto Tonizzo, Michael Twardowski, Scott McLean, Ken Voss, Marlon Lewis, and Charles Trees
Appl. Opt. 56(1) 130-146 (2017)

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)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

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

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 OSA member, or as an authorized user of your institution.

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

Figures (13)

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

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

Tables (2)

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

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

Equations (17)

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

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

Metrics

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

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

Symbol	Parameter and Unit
λ	Light wavelength in vacuum (nm)
$λ_{r}$	Reference near-IR wavelength for scattering correction [2] (nm)
a	Total absorption coefficient ( $m^{- 1}$ )
$a_{w}$	Pure seawater absorption coefficient ( $m^{- 1}$ )
$a_{NAP}$	Absorption coefficient of non-algal particles ( $m^{- 1}$ )
$a_{NAP}^{*}$	Mass-specific absorption coefficient of non-algal particles ( $m^{2} g^{- 1}$ )
$a_{CDOM}$	Absorption coefficient of colored dissolved organic matter ( $m^{- 1}$ )
$a_{Chl}$	Absorption coefficient of phytoplankton particles ( $m^{- 1}$ )
$a_{Chl}^{*}$	Chlorophyll-specific absorption coefficient of phytoplankton ( $m^{2} (mg Chl)^{- 1}$ )
$a_{t}$	Absorption coefficient of colored water constituents on top of pure water assigned (true) to each modeled water sample ( $m^{- 1}$ )
$a_{m}$	Absorption coefficient measured by the simulated AC-9 ( $m^{- 1}$ )
$a_{c}$	Absorption coefficient retrieved after scattering correction [2] of the measured $a_{m}$ coefficient( $m^{- 1}$ )
b	Total scattering coefficient ( $m^{- 1}$ )
$b_{b}$	Particulate backscattering coefficient ( $m^{- 1}$ )
$b_{w}$	Pure seawater scattering coefficient ( $m^{- 1}$ )
$b_{Chl}$	Scattering coefficient of phytoplankton particles ( $m^{- 1}$ )
$b_{NAP}$	Scattering coefficient of non-algal particles ( $m^{- 1}$ )
$b_{NAP}^{*}$	Mass-specific scattering coefficient of non-algal particles ( $m^{2} g^{- 1}$ )
$b_{t}$	Scattering coefficient of optically active water constituents on top of pure water assigned (true) to each modeled water sample ( $m^{- 1}$ )
$b_{m}$	Scattering coefficient measured by the simulated AC-9, obtained from the difference $c_{m} - a_{m}$ ( $m^{- 1}$ )
$b_{c}$	Scattering coefficient retrieved after scattering correction [2] expressed as $c_{m} - a_{c}$ ( $m^{- 1}$ )
c	Total attenuation coefficient expressed as $a + b$ ( $m^{- 1}$ )
$c_{t}$	Attenuation coefficient obtained as $a_{t} + b_{t}$ ( $m^{- 1}$ )
$c_{m}$	Attenuation coefficient measured with the simulated AC-9 ( $m^{- 1}$ )
x	Variation coefficient a, b, or c ( $m^{- 1}$ )
$ϖ_{0}$	Single scattering albedo (dimensionless)
$P_{a_{t}, b_{t}}^{x}$	Probabilities of detection (number of photons detected divided by the number of photons emitted) for the x-tube and for a given set of inherent optical properties (dimensionless)
L	AC-9 tube length (m)
FOV	Detector field of view (degree, half angle)
$k_{a}$	Scattering error coefficient in the absorption tube, expressed as $(a_{m} - a_{t}) / b_{t}$ (dimensionless)
$k_{c}$	Scattering error coefficient in the attenuation tube, expressed as $(c_{t} - c_{m}) / b_{t}$ (dimensionless)

Name	Description
NAPn	Water samples whose inherent optical properties are dominated by those of non-algal particles ( $n = 1$ , 2, 3, or 4)
NAPbkgn	Water samples whose inherent optical properties are dominated by those of non-algal particles with significant particulate light absorption in the near-IR spectral region ( $n = 1$ , 2, 3, or 4)
Chln	Water samples whose inherent optical properties are dominated by those of phytoplankton particles ( $n = 1$ , 2, or 3)
CDOMn	Water samples whose inherent optical properties are dominated by those of colored dissolved organic matter ( $n = 1$ , 2, or 3)
Mixedn	Water samples whose inherent optical properties result from the mixed contributions of the different colored water constituents ( $n = 1$ , 2, 3, or 4)
FF-xxx	Fournier–Forand phase function with a backscattering ratio of x.xx%
NAP2FFxxx	NAP2 sample with a FF-xxx Fournier–Forand phase function
ChlnFFxxx	Chln sample with a FF-xxx Fournier–Forand phase function

Symbol	Parameter and Unit
λ	Light wavelength in vacuum (nm)
$λ_{r}$	Reference near-IR wavelength for scattering correction [2] (nm)
a	Total absorption coefficient ( $m^{- 1}$ )
$a_{w}$	Pure seawater absorption coefficient ( $m^{- 1}$ )
$a_{NAP}$	Absorption coefficient of non-algal particles ( $m^{- 1}$ )
$a_{NAP}^{*}$	Mass-specific absorption coefficient of non-algal particles ( $m^{2} g^{- 1}$ )
$a_{CDOM}$	Absorption coefficient of colored dissolved organic matter ( $m^{- 1}$ )
$a_{Chl}$	Absorption coefficient of phytoplankton particles ( $m^{- 1}$ )
$a_{Chl}^{*}$	Chlorophyll-specific absorption coefficient of phytoplankton ( $m^{2} (mg Chl)^{- 1}$ )
$a_{t}$	Absorption coefficient of colored water constituents on top of pure water assigned (true) to each modeled water sample ( $m^{- 1}$ )
$a_{m}$	Absorption coefficient measured by the simulated AC-9 ( $m^{- 1}$ )
$a_{c}$	Absorption coefficient retrieved after scattering correction [2] of the measured $a_{m}$ coefficient( $m^{- 1}$ )
b	Total scattering coefficient ( $m^{- 1}$ )
$b_{b}$	Particulate backscattering coefficient ( $m^{- 1}$ )
$b_{w}$	Pure seawater scattering coefficient ( $m^{- 1}$ )
$b_{Chl}$	Scattering coefficient of phytoplankton particles ( $m^{- 1}$ )
$b_{NAP}$	Scattering coefficient of non-algal particles ( $m^{- 1}$ )
$b_{NAP}^{*}$	Mass-specific scattering coefficient of non-algal particles ( $m^{2} g^{- 1}$ )
$b_{t}$	Scattering coefficient of optically active water constituents on top of pure water assigned (true) to each modeled water sample ( $m^{- 1}$ )
$b_{m}$	Scattering coefficient measured by the simulated AC-9, obtained from the difference $c_{m} - a_{m}$ ( $m^{- 1}$ )
$b_{c}$	Scattering coefficient retrieved after scattering correction [2] expressed as $c_{m} - a_{c}$ ( $m^{- 1}$ )
c	Total attenuation coefficient expressed as $a + b$ ( $m^{- 1}$ )
$c_{t}$	Attenuation coefficient obtained as $a_{t} + b_{t}$ ( $m^{- 1}$ )
$c_{m}$	Attenuation coefficient measured with the simulated AC-9 ( $m^{- 1}$ )
x	Variation coefficient a, b, or c ( $m^{- 1}$ )
$ϖ_{0}$	Single scattering albedo (dimensionless)
$P_{a_{t}, b_{t}}^{x}$	Probabilities of detection (number of photons detected divided by the number of photons emitted) for the x-tube and for a given set of inherent optical properties (dimensionless)
L	AC-9 tube length (m)
FOV	Detector field of view (degree, half angle)
$k_{a}$	Scattering error coefficient in the absorption tube, expressed as $(a_{m} - a_{t}) / b_{t}$ (dimensionless)
$k_{c}$	Scattering error coefficient in the attenuation tube, expressed as $(c_{t} - c_{m}) / b_{t}$ (dimensionless)

Name	Description
NAPn	Water samples whose inherent optical properties are dominated by those of non-algal particles ( $n = 1$ , 2, 3, or 4)
NAPbkgn	Water samples whose inherent optical properties are dominated by those of non-algal particles with significant particulate light absorption in the near-IR spectral region ( $n = 1$ , 2, 3, or 4)
Chln	Water samples whose inherent optical properties are dominated by those of phytoplankton particles ( $n = 1$ , 2, or 3)
CDOMn	Water samples whose inherent optical properties are dominated by those of colored dissolved organic matter ( $n = 1$ , 2, or 3)
Mixedn	Water samples whose inherent optical properties result from the mixed contributions of the different colored water constituents ( $n = 1$ , 2, 3, or 4)
FF-xxx	Fournier–Forand phase function with a backscattering ratio of x.xx%
NAP2FFxxx	NAP2 sample with a FF-xxx Fournier–Forand phase function
ChlnFFxxx	Chln sample with a FF-xxx Fournier–Forand phase function

Abstract

References

Cited By

Figures (13)

Tables (2)

Equations (17)

Metrics

Login or Create Account