Articles | Volume 23, issue 9
https://doi.org/10.5194/bg-23-3073-2026
https://doi.org/10.5194/bg-23-3073-2026
Research article
 | 
08 May 2026
Research article |  | 08 May 2026

Unexpected quasi-independence of coloured dissolved organic matter absorption from chlorophyll-a concentration in the Southern Ocean

Juan Li, David Antoine, and Yannick Huot

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Cited articles

Antoine, D., Chami, M., Claustre, H., Gentili, B., Louis, F., Ras, J., Roussier, E., Scott, A. J., Tailliez, D., Hooker, S. B., Guevel, P., Desté, J.-F., Dempsey, C., and Adams, D.: BOUSSOLE: A Joint CNRS-INSU, ESA, CNES, and NASA Ocean Color Calibration and Validation Activity, NASA Technical memorandum TM-2006-214147, Goddard Space Flight Center, Greenbelt, MD 20771, available from the NASA Center for Aerospace Information, 7115 Standard Drive, Hanover, MD 21076, 2006. 
Antoine, D., Thomalla, S., Berliner, D., Little, H., Moutier, W., Olivier-Morgan, A., Robinson, C., Ryan-Keogh, T., and Schuback, N.: Phytoplankton pigment concentrations of seawater sampled during the Antarctic Circumnavigation Expedition (ACE) during the Austral Summer of 2016/2017, Zenodo [data set], https://doi.org/10.5281/zenodo.3816726, 2020. 
Antoine, D., Thomalla, S., Berliner, D., Little, H., Moutier, W., Olivier-Morgan, A., Robinson, C., Ryan-Keogh, T., and Schuback, N.: Particulate light absorption coefficients (350–750 nm) measured using the filter pad method during the Antarctic Circumnavigation Expedition (ACE) during the austral summer of 2016/2017, Zenodo [data set], https://doi.org/10.5281/zenodo.3993096, 2021. 
Argo data management: Argo user's manual, Ifremer, https://doi.org/10.13155/29825, 2025. 
Aurin, D., Mannino, A., and Lary, D. J.: Remote Sensing of CDOM, CDOM Spectral Slope, and Dissolved Organic Carbon in the Global Ocean, Applied Sciences, 8, 2687, https://doi.org/10.3390/app8122687, 2018. 
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Short summary
Evidence is growing that bio-optical relationships in the Southern Ocean differ from what they are elsewhere. Uncertainties about these properties are far from been resolved. However, our study adds a new piece to this puzzle by examining the bio-optical properties of the absorption coefficient of colored dissolved organic matter, which is the least documented property in oceanic waters. As for the methodology, this is the first time that Biogeochemical-Argo float data are used to quantify it.
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