论文信息 - Development Of Algorithms For Remote Sensing Of Marine Trichodesmium

Development Of Algorithms For Remote Sensing Of Marine Trichodesmium

Trichodesmium is a major component of the global carbon cyc"le, but because of its sporadic occurrence it is extremely difficult to study by conventional shipboard methods, and has not often been reported in imagery from the Coastal Zone Color Scanner. We made spectral reflectance and absorption measurements on natural and concentrated populations of Trichodesmium as part of a research cruise in the Caribbean in November 1988. Physiological measurements including carbon and nitrogen fixation, oxygen consumption and production were also made. This paper discusses the optical data, focussing on small spectral absorption features resulting from the nitrogen containing pigments; at 495 and 567nm by Phycoerythrin, and at 625 nm by Phycocyanin; and on the relatively high scattering caused by gas vacuoles in ,Trichodesmium cells. Reflectance data from a series dilution experiment are used to evaluate the detection limits of algorithms based on these features.

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