OSA's Digital Library

Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 20 — Sep. 27, 2010
  • pp: 20949–20959
« Show journal navigation

Effect of inherent optical properties variability on the chlorophyll retrieval from ocean color remote sensing: an in situ approach

Loisel Hubert, Bertrand Lubac, David Dessailly, Lucile Duforet-Gaurier, and Vincent Vantrepotte  »View Author Affiliations


Optics Express, Vol. 18, Issue 20, pp. 20949-20959 (2010)
http://dx.doi.org/10.1364/OE.18.020949


View Full Text Article

Acrobat PDF (1992 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

The impact of the inherent optical properties (IOP) variability on the chlorophyll, Chl, retrieval from ocean color remote sensing algorithms is analyzed from an in situ data set covering a large dynamic range. The effect of the variability of the specific phytoplankton absorption coefficient, aphy/Chl, specific particulate backscattering coefficient, bbp/Chl, and colored detrital matter absorption to non-water absorption ratio, acdm/anw, on the performance of standard operational algorithms is examined. This study confirms that empirical algorithms are highly dependent on the specifics IOP values (especially bbp/Chl and acdm/anw): Chl is over-estimated in waters with specific IOP values higher than averaged values, and vice versa. These results clearly indicate the necessity to account for the influence of the specific IOP variability in Chl retrieval algorithms.

© 2010 OSA

1. Introduction

Retrieval of chlorophyll-a concentration, Chl, from ocean color remote sensing is traditionally performed using blue-to-green reflectance ratio, BGR [1

1. J. E. O'Reilly, S. Maritorena, B. G. Mitchell, D. A. Siegel, K. L. Carder, S. A. Garver, M. Kahru, and C. R. McClain, “Ocean color chlorophyll algorithms for SeaWiFS,” J. Geophys. Res. 103(C11), 24,937–24,953 (1998). [CrossRef]

]. This is mainly due to the fact that Chl (in mg.m−3), a common pigment to all phytoplankton species, absorbs strongly in the blue and weakly in the green spectral domain. Empirical ocean color algorithms were then developed from in situ and simultaneous measurements of Chl and remote sensing reflectance, R rs(λ) (in sr−1). R rs(λ) represents the ratio of the upwelling radiance to the downwelling irradiance above the sea surface at a given visible wavelength λ (in nm). These empirical algorithms are easy to develop but are by definition highly dependent on the data set used for their development. While BGR exhibits a net decrease from oligotrophic (blue) to eutrophic (green) waters, a large statistical dispersion is however noticeable around this mean trend (Fig. 1
Fig. 1 Scatter plot of the chlorophyll concentration, Chl, as a function of blue to green reflectance ratio, BGR, from the whole in situ data set (N = 862). The solid and dashed curves represent the OC4v4 and OC3M algorithms, respectively.
). This pattern may considerably affect the accuracy of the Chl retrieval from space, which can be much beyond the nominal uncertainty of 35% [2

2. T. S. Moore, J. W. Campbell, and M. D. Dowell, “A class-based approach to characterizing and mapping the uncertainty of the MODIS ocean chlorophyll product,” Remote Sens. Environ. 113(11), 2424–2430 (2009). [CrossRef]

].

2. Data and method

In this study we use the NOMAD data set [13

13. P. J. Werdell and S. W. Bailey, “An improved in situ bio-optical data set for ocean color algorithm development and satellite data product validation,” Remote Sens. Environ. 98(1), 122–140 (2005). [CrossRef]

] together with data collected during other oceanographic cruises occurring in the French Guyana coastal waters [14

14. H. Loisel, X. Mériaux, A. Poteau, L. F. Artigas, B. Lubac, A. Gardel, J. Caillaud, and S. Lesourd, “Analyze of the inherent optical properties of French Guiana coastal waters for remote sensing applications,” J. Coast. Res. SI 56, 1532–1536 (2009).

] and in the English Channel and North sea [15

15. B. Lubac and H. Loisel, “Variability and classification of remote sensing reflectance spectra in the eastern English Channel and southern North Sea,” Remote Sens. Environ. 110(1), 45–58 (2007). [CrossRef]

] which have been recently included in the NOMAD data set. Using this data set, covering oceanic and coastal waters, we analyse the impact of three specific IOP on the dispersion in the BGR vs. Chl relationship. The first one is the specific phytoplankton absorption coefficient at 443 nm (a phy/Chl). A large natural variability in the a phy vs. Chl relationship has long been pointed out. a phy/Chl may indeed vary by a factor of about 4 for a given Chl concentration [16

16. A. Bricaud, M. Babin, A. Morel, and H. Claustre, “Variability in the chlorophyll-specific absorptioncoefficients of natural phytoplankton - analysis and parameterization,” J. Geophys. Res. 100(C7), 13321–13332 (1995). [CrossRef]

]. This biological noise is mostly driven by the average size of algal populations (i.e. package effect) rather than by the proportion of accessory pigments relative to Chl [4

4. A. Bricaud, H. Claustre, J. Ras, and K. Oubelkheir, “Natural variability of phytoplankton absorption in oceanic waters: Influence of the size structure of algal populations,” J. Geophys. Res. 109(C11), C11010 (2004), doi:. [CrossRef]

]. The second parameter is the specific particulate backscattering coefficient at 532 nm (b bp/Chl). Field measurements performed in various oceanic areas have shown that b bp exhibits a high variability (about a factor of 4) for a given chlorophyll concentration [17

17. R. A. Reynolds, D. Stramski, and B. G. Mitchell, “A chlorophyll-dependent semianalytical reflectance model derived from field measurements of absorption and backscattering coefficients within the Southern Ocean,” J. Geophys. Res. 106(C4), 7125–7138 (2001). [CrossRef]

,18

18. Y. Huot, A. Morel, M. S. Twardowski, D. Stramski, and R. A. Reynolds, “Particle optical scattering along a chlorophyll gradient in the upper layer of the eastern South Pacific Ocean,” Biogeosciences 5(2), 495–507 (2008). [CrossRef]

]. While the b bp/Chl variability is driven by particle size distribution, refractive index and shape of the bulk particulate matter, the respective influence of each of these factors is still poorly known. The last specific IOP is the ratio of the colored detrital matter absorption coefficient, a cdm, to the non-water absorption coefficient, a nw, at 443 nm (a nw = a phy + a cdm). The relative contribution of colored detrital matter absorption to non water absorption, which may drastically modify the spectral shape of R rs, is highly variable in natural waters being dependent on various biogeochemical and physical processes.

The whole data set used in this study encompasses 862 pairs of (Chl, R rs) data points for which one specific IOPs is at least available (760 are from NOMAD). Phytoplankton and colored detrital matter absorption measurements are available for 762 (Chl, BGR) data points, whereas particulate backscattering measurements are available for 323 (Chl, BGR) data points. This difference does not significantly affect the conclusions of this study since the b bp/Chl, a phy/Chl, and a cdm/a nw data points are distributed over roughly similar chlorophyll ranges. The proportion of data with relatively low chlorophyll concentration (Chl ≤ 0.5 mg.m−3) is however lower in the bbp/Chl data set (19%) than in the aphy/Chl and a cdm/a nw data sets (36% for both). The median values of b bp/Chl, a phy/Chl, and a cdm/a nw are 0.0024 m2mg−1, 0.054 m2mg−1, and 0.61 respectively. The coefficient of variation (i.e. a ratio of standard deviation to the mean) for b bp/Chl, a phy/Chl, and a cdm/a nw are 152%, 53%, and 23%, respectively. a phy(443) increases with Chl according to a power law in good agreement with standard parameterisations [16

16. A. Bricaud, M. Babin, A. Morel, and H. Claustre, “Variability in the chlorophyll-specific absorptioncoefficients of natural phytoplankton - analysis and parameterization,” J. Geophys. Res. 100(C7), 13321–13332 (1995). [CrossRef]

]. A least square fit performed on the present data set provides the following relationship: a phy(443) = 0.0543Chl −0.764(N = 762, r2 = 0.91), which is very similar to the one developed by Bricaud et al. [4

4. A. Bricaud, H. Claustre, J. Ras, and K. Oubelkheir, “Natural variability of phytoplankton absorption in oceanic waters: Influence of the size structure of algal populations,” J. Geophys. Res. 109(C11), C11010 (2004), doi:. [CrossRef]

] on an large oceanic data set [Fig. 2(a)
Fig. 2 (a) a phy(443) as a function of Chl. The solid curve represents the best fit for the 762 data points, and the dashed curves result from the algorithms of Bricaud et al. [4,16] as indicated. (b) b bp(530) as a function of Chl. The long dashed represents the best fit for the 323 data points, the short dashed curves represents the best fit for the 275 data points for which the very turbid waters have been disregarded, and the solid line results from the algorithm of Huot et al. [18]. (c) a cdm(443) as a function of Chl. The solid curve represents the best fit for the 762 data points.
]. In the same way, the b bp(532)-Chl dependency exhibits a non linear character, as expressed by the exponent 0.704:

bbp(532)=0.00299Chl0.704(N=323,r2=0.52)
(1)

This relationship is slightly modified by removing data collected in very turbid waters:

bbp(532)=0.00241Chl0.596(N=275,r2=0.70)
(2)

The threshold value for discriminating very turbid waters is fixed from Eq. (1) and Fig. 2(a), in a similar way as performed for the scattering coefficient [19

19. H. R. Gordon, and A. Morel, “Remote assessment of ocean color for satellite visible imagery. A review, “p. 1-114. In R. T. Barber, C. N. K. Mooers, M. J. Bowman, and B. Zeizschel [eds.]. Lecture notes on coastal and estuarines studies. Springer-Verlag (1983).

,20

20. H. Loisel and A. Morel, “Light scattering and chlorophyll concentration in case 1 waters: A re-examination,” Limnol. Oceanogr. 43(5), 847–858 (1998). [CrossRef]

]. In practice, stations with b bp/Chl values greater than 0.009 mg−1m2 are classified as very turbid water. The non-turbid water relationship describe by Eq. (2) is very close to the one found by Huot et al. [17

17. R. A. Reynolds, D. Stramski, and B. G. Mitchell, “A chlorophyll-dependent semianalytical reflectance model derived from field measurements of absorption and backscattering coefficients within the Southern Ocean,” J. Geophys. Res. 106(C4), 7125–7138 (2001). [CrossRef]

] from measurements performed in the upper layer of the eastern south Pacific ocean [Fig. 2(b)]. Similarly to a phy(443) and b bp(532) a relatively good relationship is also found between a cdm(443) and Chl [Fig. 2(c)]:

acdm(443)=0.0265    ​Chl0.63(N=762,r2=0.65)
(3)

This result is coherent with the study of Siegel et al. [21

21. D. A. Siegel, S. Maritorena, N. B. Nelson, and M. J. Behrenfeld, “Independence and Interdependencies Among Global Ocean Color Properties: Reassessing the Bio-Optical Assumption,” J. Geophys. Res. 110(C7), C07011 (2005b), doi:. [CrossRef]

] performed on remote sensing ocean color data who found a significant determination coefficient (r = 0.58) between a cdm(443) and Chl (their Fig. 3 and Table 3). Note that the exponent 0.63 is similar to the one found by Morel [22

22. A. Morel, “Are the empirical relationships describing the bio-optical properties of case 1 waters consistent and internally compatible?” J. Geophys. Res. 114(C1), C01016 (2009), doi:. [CrossRef]

] between the absorption by colored dissolved organic matter, a cdom, and Chl, which is expected as a cdm is dominated by a cdom for nearly all the ocean [23

23. D. A. Siegel, S. Maritorena, N. B. Nelson, D. A. Hansell, and M. Lorenzi- Kayser, “Global distribution and dynamics of colored dissolved and detrital organic materials,” J. Geophys. Res. 107(C12), 3228 (2002), doi:. [CrossRef]

]. The different observations reported here point out that the present data set, which covers a wide range of bio-optical conditions, is consistent with averaged relationships developed between IOP and Chl during the last decade.

The impact of the variability of these three specific IOP on the Chl retrieval is tested through the Chl vs BGR relationships described by the operational algorithms used for SeaWiFS (OC4.v4) and MODIS (OC3M) [24

24. J. E. O'Reilly, S. Maritorena, D. A. Siegel, M. C. O'Brien, D. Toole, B. G. Mitchell, M. Kahru, et al., “Ocean color chlorophyll a algorithms for SeaWiFS, OC2, and OC4: Version 4,” In S. B. Hooker & E.R. Firestone (Eds.), SeaWiFS Postlaunch Calibration and Validation Analyses, Part 3, vol. 11. (pp. 9−23) Greenbelt, Maryland: NASA, Goddard Space Flight Center (2000).

]. Each specific IOP sub data set is split into four equal parts computed according to Hyndman and Fan recommendation [25

25. R. J. Hyndman and Y. Fan, “Sample Quantiles in Statistical Packages,” Am. Stat. 50(4), 361–365 (1996). [CrossRef]

]. The first quartile cuts off the lowest 25% of the data. The corresponding sub data set is named DS1. The second quartile, which is equal to the median, cuts data set in half (DS2 and DS3), and third quartile cuts off highest 25% of data (DS4). The impact of the specific IOP on the Chl retrieval is evaluated through correlation analysis, root mean square log error, RMS, and average difference, AD. RMS is calculated as follows: RMS = (∑[log(Chl retrieved)-log(Chl in situ)]2/N)0.5, and AD is defined as: AD = (∑[log(Chl retrieved)-log(Chl in situ)]/N (where N is the number of samples).

3. Results and discussion

The overall comparison between in situ Chl and OC4v4 or OC3M retrieved Chl (N = 862) indicates a relatively good agreement for the whole data set [Fig. 3(a)
Fig. 3 (a) Comparison of the inversed (OC4v4) and measured Chl for the whole data set (N = 862). The solid line represents the 1:1 line, and the dashed lines the 1:2 and 2:1 lines. (b), (c), and (d) as in (a) but for the bbp/Chl (N = 323), aphy/Chl (N = 762), and a cdm/a nw (N = 762) data sets, respectively. The points belonging to DS1, DS2, DS3, and DS4 are represented as indicated for each specific IOP data set.
]. The RMS, AD, and r2 values are 25.25%, 3.80%, and 0.88 using OC4v4 (N = 862), and 24.80%, −5.04%, and 0.88 using OC3M (N = 862). These results are consistent with the conclusions of Moore et al. [2

2. T. S. Moore, J. W. Campbell, and M. D. Dowell, “A class-based approach to characterizing and mapping the uncertainty of the MODIS ocean chlorophyll product,” Remote Sens. Environ. 113(11), 2424–2430 (2009). [CrossRef]

] which were based on a much larger in situ data set. The scatter of the data points around the 1:1 line indicates that Chl may be over- or under-estimated by a factor of 2 within the whole chlorophyll range.

The comparison is now performed for the three specific IOP data sets to analyse the impact of the natural variability of IOP on the Chl retrieval accuracy [Figs. 3 (b), 3(c), 3(d)]. The RMS, AD, and r2 values calculated for the data sets associated with each specific IOP are equivalent to those calculated for the whole data set (Table 1

Table 1. Root mean square log error, average difference, and regression coefficient values calculated between measured and predicted (with OC4v4 and OC3M) Chl for the whole data set (W), and the three specific IOP data set (for DS1 and DS4). The values for the non-very turbid data set are in bold

table-icon
View This Table
). For the three specific IOP data sets the relative error on the Chl retrieval may reach 100% over the whole Chl range (i.e. the data points on the 1:2 and 2:1 lines). While DS2 and DS3 are generally close to the 1:1 line of the in situ Chl vs satellite Chl relationships, this is not the case for DS1 and DS4. The points belonging to DS1 and DS4 are those for which the corresponding specific IOP values are respectively the lowest and greatest. The median and variation coefficient (in %) values of b bp/Chl, a phy/Chl, and a cdm/a nw are 0.0009 m2mg−1(37%), 0.0294 m2mg−1 (25%), and 0.443 (18%) for DS1. The median values respectively jump to 0.0066 m2mg−1 (94%), 0.098 m2mg−1 (27%), and 0.757 (8%) for DS4. Therefore, the median b bp/Chl, aphy/Chl, and a cdm/a nw values vary respectively by a factor of 7.3, 3.3, and 1.7 between DS1 and DS4. When the very turbid data points are discarded from the b bp/Chl data set, the median value of b bp/Chl increases from 0.0008 m2mg−1 (34%) to 0.0045 (24%) m2mg−1 between DS1 and DS4 (a factor of 5.6). The average difference, which estimates the overall bias, clearly indicates that both OC4v4 and OC3M underestimate Chl (negative AD values) in DS1 and overestimate Chl (positive AD values) in DS4, whatever the specific IOP data set (Table 1). For instance, Chl is underestimated by 17.18% in DS1 and overestimated by 20.75% in DS4 for the b bp/Chl data set and using OC4v4. Note that the AD values for the b bp/Chl data set are similar for the non-very turbid data set (−17.2% for DS1 and 18.4% for DS4). Histograms showing the frequency distribution of the relative difference between the measured and estimated Chl also emphasize a significant shift from negative (under-estimation) to positive (over-estimation) values when the data set moves from DS1 to DS4 (Fig. 4
Fig. 4 Histograms of the Chl relative error calculated for each specific IOP data set and for DS1 (left panel) and DS4 (right panel) using OC4v4 and OC3M. The mean and median values are indicated.
). For instance, the median value of the relative difference between in situ and inversed OC4v4 Chl increases from −33% to 60% when b bp/Chl increases between DS1 and DS4, respectively (same trend for OC3M). In contrast, this increase is lower for the two other specific IOP, as the median value of the relative Chl difference increases from −22% (−18.7) to 9.6% (27.4) when a phy/Chl (a cdm/a nw) increases between DS1 and DS4. These results clearly indicate that Chl is underestimated by empirical algorithms in waters with specific IOP values “lower” than averaged values, and vice versa. Averaged values are calculated from the empirical relationships developed from in situ measurements of IOP and Chl.

Improvement of bio-optical algorithms dedicated to the Chl retrieval from ocean color remote sensing should account for specific IOP variability. Simultaneous retrieval of IOP and Chl, as already performed from semi-analytical algorithms (e.g. [29

29. S. Maritorena, D. A. Siegel, and A. R. Peterson, “Optimization of a semianalytical ocean color model for global-scale applications,” Appl. Opt. 41(15), 2705–2714 (2002). [CrossRef] [PubMed]

]), allows to partly take into account such variability (even though some specific IOP values have to be fixed in these algorithms). Classification of R rs spectra, prior to application of specific bio-optical algorithms, may also represent a valuable way to improve the Chl retrieval (e.g. [2

2. T. S. Moore, J. W. Campbell, and M. D. Dowell, “A class-based approach to characterizing and mapping the uncertainty of the MODIS ocean chlorophyll product,” Remote Sens. Environ. 113(11), 2424–2430 (2009). [CrossRef]

,15

15. B. Lubac and H. Loisel, “Variability and classification of remote sensing reflectance spectra in the eastern English Channel and southern North Sea,” Remote Sens. Environ. 110(1), 45–58 (2007). [CrossRef]

]).

Acknowledgments

This work was supported by Centre National d’Etude Spatiale in the frame of the COULCOT project (TOSCA program). The authors would also like to thank the many scientists who have shared their in situ data in the NOMAD public database, which has made this work possible.

References and links

1.

J. E. O'Reilly, S. Maritorena, B. G. Mitchell, D. A. Siegel, K. L. Carder, S. A. Garver, M. Kahru, and C. R. McClain, “Ocean color chlorophyll algorithms for SeaWiFS,” J. Geophys. Res. 103(C11), 24,937–24,953 (1998). [CrossRef]

2.

T. S. Moore, J. W. Campbell, and M. D. Dowell, “A class-based approach to characterizing and mapping the uncertainty of the MODIS ocean chlorophyll product,” Remote Sens. Environ. 113(11), 2424–2430 (2009). [CrossRef]

3.

B. G. Mitchell and O. Holm-Hansen, “Bio-optical properties of Antarctic Peninsula waters: Differentiation from temperate ocean models,” Deep-Sea Res. 38(8-9), 1009–1028 (1991). [CrossRef]

4.

A. Bricaud, H. Claustre, J. Ras, and K. Oubelkheir, “Natural variability of phytoplankton absorption in oceanic waters: Influence of the size structure of algal populations,” J. Geophys. Res. 109(C11), C11010 (2004), doi:. [CrossRef]

5.

W. M. Balch, K. Kilpatrick, P. M. Holligan, D. Harbour, and E. Fernandez, “The 1991 coccolithophore bloom in the central north Atlantic II: relating optics to coccolith concentration,” Limnol. Oceanogr. 41(8), 1684–1696 (1996). [CrossRef]

6.

W. M. Balch, H. R. Gordon, B. C. Bowler, D. T. Drapeau, and E. S. Booth, “Calcium carbonate measurements in the surface global ocean based on Moderate-Resolution Imaging Spectroradiometer data,” J. Geophys. Res. 110(C7), C07001 (2005), doi:. [CrossRef]

7.

S. Alvain, C. Moulin, Y. Dandonneau, H. Loisel, and F. M. Bréon, “A species-dependent bio-optical model of case 1 waters for global ocean color processing,” Deep Sea Res. Part II Top. Stud. Oceanogr. 53, 917–925 (2006).

8.

M. Stramska, D. Stramski, S. Kaczmarek, D. B. Allison, and J. Schwarz, “Seasonal and regional differentiation of bio-optical properties within the north polar Atlantic,” J. Geophys. Res. 111(C8), C08003 (2006), doi:. [CrossRef]

9.

K. L. Carder, S. K. Hawes, K. A. Baker, R. C. Smith, R. G. Steward, and B. G. Mitchell, “Reflectance model for quantifying chlorophyll-a in the presence of productivity degradation products,” J. Geophys. Res. 96(C11), 20599–20611 (1991). [CrossRef]

10.

D. A. Siegel, S. Maritorena, N. B. Nelson, M. J. Behrenfeld, and C. R. McClain, “Colored dissolved organic matter and its influence on the satellite-based characterization of the ocean biosphere,” Geophys. Res. Lett. 32(20), L20605 (2005), doi:. [CrossRef]

11.

A. Morel and B. Gentili, “The dissolved yellow substance and the shades of blue in the Mediterranean Sea,” Biogeosciences 6(11), 2625–2636 (2009). [CrossRef]

12.

C. A. Brown, Y. Huot, P. J. Werdell, B. Gentili, and H. Claustre, “The origin and global distribution of second order variability in satellite ocean color and its potential applications to algorithm development,” Remote Sens. Environ. 112(12), 4186–4203 (2008), doi:. [CrossRef]

13.

P. J. Werdell and S. W. Bailey, “An improved in situ bio-optical data set for ocean color algorithm development and satellite data product validation,” Remote Sens. Environ. 98(1), 122–140 (2005). [CrossRef]

14.

H. Loisel, X. Mériaux, A. Poteau, L. F. Artigas, B. Lubac, A. Gardel, J. Caillaud, and S. Lesourd, “Analyze of the inherent optical properties of French Guiana coastal waters for remote sensing applications,” J. Coast. Res. SI 56, 1532–1536 (2009).

15.

B. Lubac and H. Loisel, “Variability and classification of remote sensing reflectance spectra in the eastern English Channel and southern North Sea,” Remote Sens. Environ. 110(1), 45–58 (2007). [CrossRef]

16.

A. Bricaud, M. Babin, A. Morel, and H. Claustre, “Variability in the chlorophyll-specific absorptioncoefficients of natural phytoplankton - analysis and parameterization,” J. Geophys. Res. 100(C7), 13321–13332 (1995). [CrossRef]

17.

R. A. Reynolds, D. Stramski, and B. G. Mitchell, “A chlorophyll-dependent semianalytical reflectance model derived from field measurements of absorption and backscattering coefficients within the Southern Ocean,” J. Geophys. Res. 106(C4), 7125–7138 (2001). [CrossRef]

18.

Y. Huot, A. Morel, M. S. Twardowski, D. Stramski, and R. A. Reynolds, “Particle optical scattering along a chlorophyll gradient in the upper layer of the eastern South Pacific Ocean,” Biogeosciences 5(2), 495–507 (2008). [CrossRef]

19.

H. R. Gordon, and A. Morel, “Remote assessment of ocean color for satellite visible imagery. A review, “p. 1-114. In R. T. Barber, C. N. K. Mooers, M. J. Bowman, and B. Zeizschel [eds.]. Lecture notes on coastal and estuarines studies. Springer-Verlag (1983).

20.

H. Loisel and A. Morel, “Light scattering and chlorophyll concentration in case 1 waters: A re-examination,” Limnol. Oceanogr. 43(5), 847–858 (1998). [CrossRef]

21.

D. A. Siegel, S. Maritorena, N. B. Nelson, and M. J. Behrenfeld, “Independence and Interdependencies Among Global Ocean Color Properties: Reassessing the Bio-Optical Assumption,” J. Geophys. Res. 110(C7), C07011 (2005b), doi:. [CrossRef]

22.

A. Morel, “Are the empirical relationships describing the bio-optical properties of case 1 waters consistent and internally compatible?” J. Geophys. Res. 114(C1), C01016 (2009), doi:. [CrossRef]

23.

D. A. Siegel, S. Maritorena, N. B. Nelson, D. A. Hansell, and M. Lorenzi- Kayser, “Global distribution and dynamics of colored dissolved and detrital organic materials,” J. Geophys. Res. 107(C12), 3228 (2002), doi:. [CrossRef]

24.

J. E. O'Reilly, S. Maritorena, D. A. Siegel, M. C. O'Brien, D. Toole, B. G. Mitchell, M. Kahru, et al., “Ocean color chlorophyll a algorithms for SeaWiFS, OC2, and OC4: Version 4,” In S. B. Hooker & E.R. Firestone (Eds.), SeaWiFS Postlaunch Calibration and Validation Analyses, Part 3, vol. 11. (pp. 9−23) Greenbelt, Maryland: NASA, Goddard Space Flight Center (2000).

25.

R. J. Hyndman and Y. Fan, “Sample Quantiles in Statistical Packages,” Am. Stat. 50(4), 361–365 (1996). [CrossRef]

26.

K. L. Carder, S. K. Hawes, K. A. Baker, R. C. Smith, R. G. Steward, and B. G. Mitchell, “Reflectance model for quantifying chlorophyll-a in the presence of productivity degradation products,” J. Geophys. Res. 96(C11), 20599–20611 (1991). [CrossRef]

27.

H. Claustre, A. Morel, S. B. Hooker, M. Babin, D. Antoine, K. Oubelkheir, A. Bricaud, K. Leblanc, B. Quéguiner, and S. Maritorena, “Is desert dust making oligotrophic waters greener,” Geophys. Res. Lett. 29(10), 1469 (2002), doi:. [CrossRef]

28.

IOCCG, “Remote Sensing of Inherent Optical Properties: Fundamentals, Tests of Algorithms, and Applications,” in Reports of the International Ocean-Colour Coordinating Group, No. 5, Z. P. Lee, ed. (IOCCG, Dartmouth, 2006).

29.

S. Maritorena, D. A. Siegel, and A. R. Peterson, “Optimization of a semianalytical ocean color model for global-scale applications,” Appl. Opt. 41(15), 2705–2714 (2002). [CrossRef] [PubMed]

OCIS Codes
(010.4450) Atmospheric and oceanic optics : Oceanic optics
(280.4991) Remote sensing and sensors : Passive remote sensing
(010.1030) Atmospheric and oceanic optics : Absorption
(010.1350) Atmospheric and oceanic optics : Backscattering
(010.1690) Atmospheric and oceanic optics : Color

ToC Category:
Remote Sensing

History
Original Manuscript: August 3, 2010
Revised Manuscript: September 9, 2010
Manuscript Accepted: September 9, 2010
Published: September 17, 2010

Virtual Issues
Vol. 5, Iss. 14 Virtual Journal for Biomedical Optics

Citation
Hubert Loisel, Bertrand Lubac, David Dessailly, Lucile Duforet-Gaurier, and Vincent Vantrepotte, "Effect of inherent optical properties variability on the chlorophyll retrieval from ocean color remote sensing: an in situ approach," Opt. Express 18, 20949-20959 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-20-20949


Sort:  Author  |  Year  |  Journal  |  Reset  

References

  1. J. E. O'Reilly, S. Maritorena, B. G. Mitchell, D. A. Siegel, K. L. Carder, S. A. Garver, M. Kahru, and C. R. McClain, “Ocean color chlorophyll algorithms for SeaWiFS,” J. Geophys. Res. 103(C11), 24,937–24,953 (1998). [CrossRef]
  2. T. S. Moore, J. W. Campbell, and M. D. Dowell, “A class-based approach to characterizing and mapping the uncertainty of the MODIS ocean chlorophyll product,” Remote Sens. Environ. 113(11), 2424–2430 (2009). [CrossRef]
  3. B. G. Mitchell and O. Holm-Hansen, “Bio-optical properties of Antarctic Peninsula waters: Differentiation from temperate ocean models,” Deep-Sea Res. 38(8-9), 1009–1028 (1991). [CrossRef]
  4. A. Bricaud, H. Claustre, J. Ras, and K. Oubelkheir, “Natural variability of phytoplankton absorption in oceanic waters: Influence of the size structure of algal populations,” J. Geophys. Res. 109(C11), C11010 (2004), doi:. [CrossRef]
  5. W. M. Balch, K. Kilpatrick, P. M. Holligan, D. Harbour, and E. Fernandez, “The 1991 coccolithophore bloom in the central north Atlantic II: relating optics to coccolith concentration,” Limnol. Oceanogr. 41(8), 1684–1696 (1996). [CrossRef]
  6. W. M. Balch, H. R. Gordon, B. C. Bowler, D. T. Drapeau, and E. S. Booth, “Calcium carbonate measurements in the surface global ocean based on Moderate-Resolution Imaging Spectroradiometer data,” J. Geophys. Res. 110(C7), C07001 (2005), doi:. [CrossRef]
  7. S. Alvain, C. Moulin, Y. Dandonneau, H. Loisel, and F. M. Bréon, “A species-dependent bio-optical model of case 1 waters for global ocean color processing,” Deep Sea Res. Part II Top. Stud. Oceanogr. 53, 917–925 (2006).
  8. M. Stramska, D. Stramski, S. Kaczmarek, D. B. Allison, and J. Schwarz, “Seasonal and regional differentiation of bio-optical properties within the north polar Atlantic,” J. Geophys. Res. 111(C8), C08003 (2006), doi:. [CrossRef]
  9. K. L. Carder, S. K. Hawes, K. A. Baker, R. C. Smith, R. G. Steward, and B. G. Mitchell, “Reflectance model for quantifying chlorophyll-a in the presence of productivity degradation products,” J. Geophys. Res. 96(C11), 20599–20611 (1991). [CrossRef]
  10. D. A. Siegel, S. Maritorena, N. B. Nelson, M. J. Behrenfeld, and C. R. McClain, “Colored dissolved organic matter and its influence on the satellite-based characterization of the ocean biosphere,” Geophys. Res. Lett. 32(20), L20605 (2005), doi:. [CrossRef]
  11. A. Morel and B. Gentili, “The dissolved yellow substance and the shades of blue in the Mediterranean Sea,” Biogeosciences 6(11), 2625–2636 (2009). [CrossRef]
  12. C. A. Brown, Y. Huot, P. J. Werdell, B. Gentili, and H. Claustre, “The origin and global distribution of second order variability in satellite ocean color and its potential applications to algorithm development,” Remote Sens. Environ. 112(12), 4186–4203 (2008), doi:. [CrossRef]
  13. P. J. Werdell and S. W. Bailey, “An improved in situ bio-optical data set for ocean color algorithm development and satellite data product validation,” Remote Sens. Environ. 98(1), 122–140 (2005). [CrossRef]
  14. H. Loisel, X. Mériaux, A. Poteau, L. F. Artigas, B. Lubac, A. Gardel, J. Caillaud, and S. Lesourd, “Analyze of the inherent optical properties of French Guiana coastal waters for remote sensing applications,” J. Coast. Res. SI 56, 1532–1536 (2009).
  15. B. Lubac and H. Loisel, “Variability and classification of remote sensing reflectance spectra in the eastern English Channel and southern North Sea,” Remote Sens. Environ. 110(1), 45–58 (2007). [CrossRef]
  16. A. Bricaud, M. Babin, A. Morel, and H. Claustre, “Variability in the chlorophyll-specific absorptioncoefficients of natural phytoplankton - analysis and parameterization,” J. Geophys. Res. 100(C7), 13321–13332 (1995). [CrossRef]
  17. R. A. Reynolds, D. Stramski, and B. G. Mitchell, “A chlorophyll-dependent semianalytical reflectance model derived from field measurements of absorption and backscattering coefficients within the Southern Ocean,” J. Geophys. Res. 106(C4), 7125–7138 (2001). [CrossRef]
  18. Y. Huot, A. Morel, M. S. Twardowski, D. Stramski, and R. A. Reynolds, “Particle optical scattering along a chlorophyll gradient in the upper layer of the eastern South Pacific Ocean,” Biogeosciences 5(2), 495–507 (2008). [CrossRef]
  19. H. R. Gordon, and A. Morel, “Remote assessment of ocean color for satellite visible imagery. A review, “p. 1-114. In R. T. Barber, C. N. K. Mooers, M. J. Bowman, and B. Zeizschel [eds.]. Lecture notes on coastal and estuarines studies. Springer-Verlag (1983).
  20. H. Loisel and A. Morel, “Light scattering and chlorophyll concentration in case 1 waters: A re-examination,” Limnol. Oceanogr. 43(5), 847–858 (1998). [CrossRef]
  21. D. A. Siegel, S. Maritorena, N. B. Nelson, and M. J. Behrenfeld, “Independence and Interdependencies Among Global Ocean Color Properties: Reassessing the Bio-Optical Assumption,” J. Geophys. Res. 110(C7), C07011 (2005b), doi:. [CrossRef]
  22. A. Morel, “Are the empirical relationships describing the bio-optical properties of case 1 waters consistent and internally compatible?” J. Geophys. Res. 114(C1), C01016 (2009), doi:. [CrossRef]
  23. D. A. Siegel, S. Maritorena, N. B. Nelson, D. A. Hansell, and M. Lorenzi- Kayser, “Global distribution and dynamics of colored dissolved and detrital organic materials,” J. Geophys. Res. 107(C12), 3228 (2002), doi:. [CrossRef]
  24. J. E. O'Reilly, S. Maritorena, D. A. Siegel, M. C. O'Brien, D. Toole, B. G. Mitchell, M. Kahru, et al., “Ocean color chlorophyll a algorithms for SeaWiFS, OC2, and OC4: Version 4,” In S. B. Hooker & E.R. Firestone (Eds.), SeaWiFS Postlaunch Calibration and Validation Analyses, Part 3, vol. 11. (pp. 9−23) Greenbelt, Maryland: NASA, Goddard Space Flight Center (2000).
  25. R. J. Hyndman and Y. Fan, “Sample Quantiles in Statistical Packages,” Am. Stat. 50(4), 361–365 (1996). [CrossRef]
  26. K. L. Carder, S. K. Hawes, K. A. Baker, R. C. Smith, R. G. Steward, and B. G. Mitchell, “Reflectance model for quantifying chlorophyll-a in the presence of productivity degradation products,” J. Geophys. Res. 96(C11), 20599–20611 (1991). [CrossRef]
  27. H. Claustre, A. Morel, S. B. Hooker, M. Babin, D. Antoine, K. Oubelkheir, A. Bricaud, K. Leblanc, B. Quéguiner, and S. Maritorena, “Is desert dust making oligotrophic waters greener,” Geophys. Res. Lett. 29(10), 1469 (2002), doi:. [CrossRef]
  28. IOCCG, “Remote Sensing of Inherent Optical Properties: Fundamentals, Tests of Algorithms, and Applications,” in Reports of the International Ocean-Colour Coordinating Group, No. 5, Z. P. Lee, ed. (IOCCG, Dartmouth, 2006).
  29. S. Maritorena, D. A. Siegel, and A. R. Peterson, “Optimization of a semianalytical ocean color model for global-scale applications,” Appl. Opt. 41(15), 2705–2714 (2002). [CrossRef] [PubMed]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

Figures

Fig. 1 Fig. 2 Fig. 3
 
Fig. 4 Fig. 5
 

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited