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Proceedings Paper

Challenges to identify phytoplankton species in coastal waters by remote sensing
Author(s): B. Lubac; H. Loisel; A. Poteau; X. Meriaux
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Paper Abstract

During spring and summer 2004, intensive field campaigns were conducted in the Eastern English Channel. This region is characterized by relatively intense phytoplankton blooms, low bathymetry, strong tide ranges and great river inputs. The sampling period accounts for episodic blooms of prymnesiophyceae Phaeocystis globosa and diatoms. Hyperspectral radiometric measurements (TRIOS; 350-950 nm, with a 3 nm spectral resolution) were concurrently performed with water sampling for biogeochemical and optical characterization. The remote sensing reflectance, Rrs, is analyzed in conjunction with variation of the water composition. We particularly focus on the capability to identify some phytoplankton species from Rrs in this very variable environment. Different methods, based on multispectral and hyperspectral data are tested and compared for that purpose. We show that no Rrs ratio allows to discriminate between diatoms and Phaeocystis. In contrast, the derivative analysis applied to hyperspectral data stresses large differences in some part of the Rrs spectra collected in diatoms or Phaeocystis dominated waters.

Paper Details

Date Published: 10 September 2005
PDF: 10 pages
Proc. SPIE 5885, Remote Sensing of the Coastal Oceanic Environment, 58850U (10 September 2005); doi: 10.1117/12.614805
Show Author Affiliations
B. Lubac, Univ. du Littorale Cote d'Opale (France)
H. Loisel, Univ. du Littorale Cote d'Opale (France)
A. Poteau, Univ. du Littorale Cote d'Opale (France)
X. Meriaux, Univ. du Littorale Cote d'Opale (France)

Published in SPIE Proceedings Vol. 5885:
Remote Sensing of the Coastal Oceanic Environment
Robert J. Frouin; Marcel Babin; Shubha Sathyendranath, Editor(s)

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