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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 11 — Apr. 10, 2013
  • pp: 2257–2273

Multivariate approach for the retrieval of phytoplankton size structure from measured light absorption spectra in the Mediterranean Sea (BOUSSOLE site)

Emanuele Organelli, Annick Bricaud, David Antoine, and Julia Uitz  »View Author Affiliations


Applied Optics, Vol. 52, Issue 11, pp. 2257-2273 (2013)
http://dx.doi.org/10.1364/AO.52.002257


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Abstract

Models based on the multivariate partial least squares (PLS) regression technique are developed for the retrieval of phytoplankton size structure from measured light absorption spectra (BOUSSOLE site, northwestern Mediterranean Sea). PLS-models trained with data from the Mediterranean Sea showed good accuracy in retrieving, over the nine-year BOUSSOLE time series, the concentrations of total chlorophyll a [Tchl a ], of the sum of seven diagnostic pigments and of pigments associated with micro, nano, and picophytoplankton size classes separately. PLS-models trained using either total particle or phytoplankton absorption spectra performed similarly, and both reproduced seasonal variations of biomass and size classes derived by high performance liquid chromatography. Satisfactory retrievals were also obtained using PLS-models trained with a data set including various locations of the world’s oceans, with however a lower accuracy. These results open the way to an application of this method to absorption spectra derived from hyperspectral and field satellite radiance measurements.

© 2013 Optical Society of America

OCIS Codes
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(010.4450) Atmospheric and oceanic optics : Oceanic optics
(010.7340) Atmospheric and oceanic optics : Water
(010.1030) Atmospheric and oceanic optics : Absorption

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: November 12, 2012
Revised Manuscript: February 5, 2013
Manuscript Accepted: February 11, 2013
Published: April 4, 2013

Virtual Issues
Vol. 8, Iss. 5 Virtual Journal for Biomedical Optics

Citation
Emanuele Organelli, Annick Bricaud, David Antoine, and Julia Uitz, "Multivariate approach for the retrieval of phytoplankton size structure from measured light absorption spectra in the Mediterranean Sea (BOUSSOLE site)," Appl. Opt. 52, 2257-2273 (2013)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-52-11-2257

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