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A locally tuned Cphyto algorithm for the Ross Sea, Antarctica
  • Meredith Grace Meyer,
  • Walker O. Smith, Jr.
Meredith Grace Meyer
University of North Carolina at Chapel Hill

Corresponding Author:[email protected]

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Walker O. Smith, Jr.
Shanghai Jiao Tong University
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To improve current estimates of phytoplankton specific carbon in the Ross Sea, we calculated a regionally specific algorithm from in situ particulate organic carbon (POC) concentrations and backscatter sensor data. These data come from three independent Seaglider deployments during the austral summer. Algal-specific POC (Cphyto) accounted for between 19.8-61.0% of total POC in the Ross Sea with an average Cphyto concentration of 84.2 µg C L-1. As a result, Cphyto:chlorophyll a ratios were less than POC:chlorophyll a ratios and ranged from 9.00-257 µg C (µg chlorophyll a) L-1. This regionally-specific method is substantially more accurate (average Cphyto concentrations are 10-78 µg C L-1 greater) than estimates derived from published algorithms. Our findings highlight the value of regionally-specific algorithms for measuring inherent optical properties and how such approaches can inform our current understanding of particulate carbon partitioning and food web dynamics.
15 Dec 2023Submitted to ESS Open Archive
18 Dec 2023Published in ESS Open Archive