Three decades of ocean-color remote-sensing Trichodesmium spp. in the world's oceans: a review

McKinna, Lachlan I.W. (2015) Three decades of ocean-color remote-sensing Trichodesmium spp. in the world's oceans: a review. Progress in Oceanography, 131. pp. 177-199.

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Abstract

Ocean-color sensors have provided the necessary platform for synoptic-scale detection and monitoring of the nitrogen-fixing marine cyanobacterium Trichodesmium spp. Such information is invaluable to global biogeochemical studies which require accurate estimates of atmospherically-fixed nitrogen. This article reviews literature from the past three decades and discusses the development of Trichodesmium-specific remote-sensing methods and how these have been revised with improved knowledge of bio-optical properties and remote-sensing technologies. Overall, the majority of Trichodesmium-specific detection methods have been non-quantitative and developed primarily for mapping the occurrence of dense surface aggregations of the cyanobacteria. The ability to positively discriminate and quantify low background concentrations of Trichodesmium (e.g. <3200 trichomes L-1) dispersed within the water column still remains an intractable problem. Furthermore, the spectral and spatial resolutions of existing ocean-color sensors are presently a limiting factor for quantitative Trichodesmium remote sensing. It is noted that planned next-generation sensors with higher spectral resolutions, in both low earth and geostationary orbits, are likely to enhance efforts to remotely-sense global Trichodesmium abundance.

Item ID: 41910
Item Type: Article (Research - C1)
ISSN: 1873-4472
Funders: James Cook University (JCU), National Aeronautics and Space Administration (NASA)
Projects and Grants: JCU Postgraduate Research Grant
Date Deposited: 08 Dec 2015 15:19
FoR Codes: 05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050206 Environmental Monitoring @ 100%
SEO Codes: 96 ENVIRONMENT > 9605 Ecosystem Assessment and Management > 960507 Ecosystem Assessment and Management of Marine Environments @ 100%
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