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Proceedings Paper

On the feasibility of detecting Trichodesmium blooms with SeaWiFS in the South Western Tropical Pacific
Author(s): Cécile Dupouy; Dominique Benielli-Gary; Yves Dandonneau; Jacques Neveux; Guillaume Dirberg; Toby Westberry
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Paper Abstract

Trichodesmium, a major colonial cyanobacterial nitrogen fixer, forms large blooms in tropical oligotrophic oceans and enhances CO2 sequestration by the ocean due to its ability to fix dissolved dinitrogen, however, its detection by satellite has not yet been successful in the South Western Tropical Pacific. Here, an algorithm has been developed for discriminating radiance anomalies observed in SeaWiFS imagery over the summertime Tropical Pacific. Its validation used 70 in situ observations of Trichodesmium accumulations for the period 1997-2004. The fraction of pixels identified as Trichodesmium in the region 5°S-25°S 160°E-190°E is low (between 0.1 and 0.5%) but is about 100 times higher than previous algorithms indicate. The algorithm reproduces the observed seasonal and inter-annual variability of Trichodesmium blooms in the SWTP.

Paper Details

Date Published: 19 December 2008
PDF: 9 pages
Proc. SPIE 7150, Remote Sensing of Inland, Coastal, and Oceanic Waters, 715010 (19 December 2008); doi: 10.1117/12.806295
Show Author Affiliations
Cécile Dupouy, Ctr. Institut de Recherche pour le Développement de Nouméa (New Caledonia)
Dominique Benielli-Gary, OAMP (France)
Yves Dandonneau, UPMC, CNRS, Univ. Pierre et Marie Curie (France)
Jacques Neveux, LOBB, CNRS, Observatoire Océanologique (France)
Guillaume Dirberg, Univ. de la Méditerranée (France)
Toby Westberry, Oregon State Univ. (United States)


Published in SPIE Proceedings Vol. 7150:
Remote Sensing of Inland, Coastal, and Oceanic Waters
Robert J. Frouin; Serge Andrefouet; Hiroshi Kawamura; Mervyn J. Lynch; Delu Pan; Trevor Platt, Editor(s)

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