Articles | Volume 18, issue 23
https://doi.org/10.5194/bg-18-6349-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-18-6349-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
13 Dec 2021
Research article |
| 13 Dec 2021
| 13 Dec 2021
Seasonal dispersal of fjord meltwaters as an important source of iron and manganese to coastal Antarctic phytoplankton
Scripps Institution of Oceanography, University of California San
Diego, La Jolla, 92037, USA
Lisa Hahn-Woernle
Department of Oceanography, University of Hawai'i, Manoa, 96822, USA
Robert M. Sherrell
Departments of Marine and Coastal Sciences and Earth and Planetary
Sciences, Rutgers University, New Brunswick, 08901, USA
Vincent J. Roccanova
Departments of Marine and Coastal Sciences and Earth and Planetary
Sciences, Rutgers University, New Brunswick, 08901, USA
Kaixuan Bu
Departments of Marine and Coastal Sciences and Earth and Planetary
Sciences, Rutgers University, New Brunswick, 08901, USA
David Burdige
Department of Ocean & Earth Sciences, Old Dominion University,
Norfolk, 23529, USA
Maria Vernet
Scripps Institution of Oceanography, University of California San
Diego, La Jolla, 92037, USA
Katherine A. Barbeau
Scripps Institution of Oceanography, University of California San
Diego, La Jolla, 92037, USA
Related authors
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Anh Pham, Alexis Floback, Natalya Evans, Claire Till, Ralph Till, James Moffett, Katherine Barbeau, and Daniele Bianchi
EGUsphere, https://doi.org/10.5194/egusphere-2026-4502, https://doi.org/10.5194/egusphere-2026-4502, 2026
This preprint is open for discussion and under review for Biogeosciences (BG).
Short summary
Short summary
Iron is an essential nutrient for ocean life, but the processes controlling its distribution along the United States West Coast are not well understood. We combined measurements collected over nearly four decades to identify the main factors shaping iron concentrations. Our results show that rivers, ocean circulation, biological activity, and chemical processes all play important roles. This work provides a foundation for improving ocean and climate models and guiding future observations.
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Short summary
We show that for an unperturbed cold western Antarctic Peninsula fjord, the seasonality of iron and manganese is linked to the dispersal of metal-rich meltwater sources. Geochemical measurements of trace metals in meltwaters, porewaters, and seawater, collected during two expeditions, showed a seasonal cycle of distinct sources. Finally, model results revealed that the dispersal of surface meltwater and meltwater plumes originating from under the glacier is sensitive to katabatic wind events.
We show that for an unperturbed cold western Antarctic Peninsula fjord, the seasonality of iron...
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