Using Optical Sensors on Gliders to Estimate Phytoplankton Carbon Concentrations and Chlorophyll-to-Carbon Ratios in the Southern Ocean.
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Thomalla, Sandy J.
Ogunkoya, A. Gilbert
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One approach to deriving phytoplankton carbon biomass estimates (Cphyto) at appropriate scales is through optical products. This study uses a high-resolution glider data set in the Sub-Antarctic Zone (SAZ) of the Southern Ocean to compare four different methods of deriving Cphyto from particulate backscattering and fluorescence-derived chlorophyll (chl-a). A comparison of the methods showed that at low (<0.5mg m−3) chlorophyll concentrations (e.g., early spring and at depth), all four methods produced similar estimates of Cphyto, whereas when chlorophyll concentrations were elevated one method derived higher concentrations of Cphyto than the others. The use of methods derived from particulate backscattering rather than fluorescence can account for cellular adjustments in chl-a:Cphyto that are not driven by biomass alone. A comparison of the glider chl-a:Cphyto ratios from the different optical methods with ratios from laboratory cultures and cruise data found that some optic.....
JournalFrontiers in Marine Science
Sustainable Development Goals (SDG)14.A
Essential Ocean Variables (EOV)Phytoplankton biomass and diversity
Maturity LevelTRL 7 System prototyping demonstration in an operational environment (ground or space)
Best Practice TypeManual (incl. handbook, guide, cookbook etc)
Standard Operating Procedure
Spatial CoverageSouthern Ocean
CitationThomalla, S.J.; Ogunkoya, A.G.; Vichi, M, and Swart, S. (2017) Using Optical Sensors on Gliders to Estimate Phytoplankton Carbon Concentrations and Chlorophyll-to-Carbon Ratios in the Southern Ocean. Frontiers in Marine Science, 4:34, 19pp. DOI: 10.3389/fmars.2017.00034
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