Biogeochemical‐Argo floats reveal seasonality of the biological carbon pump influenced by the Lofoten Basin Eddy

Koestner, D. ORCID: https://orcid.org/0000-0002-2252-4847; Clayton, S. ORCID: https://orcid.org/0000-0001-7473-4873; Lerner, P. ORCID: https://orcid.org/0000-0003-4751-0262; Jones‐Kellett, A. E. ORCID: https://orcid.org/0000-0002-1727-2219; Walker, S. L. ORCID: https://orcid.org/0000-0001-9503-1157. 2025 Biogeochemical‐Argo floats reveal seasonality of the biological carbon pump influenced by the Lofoten Basin Eddy. Geophysical Research Letters, 52 (12). 10.1029/2024GL111937

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Text © 2025. The Author(s).This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. Geophysical Research Letters - 2025 - Koestner - Biogeochemical‐Argo Floats Reveal Seasonality of the Biological Carbon.pdf - Published Version Available under License Creative Commons Attribution 4.0. Download (3MB) | Preview

Abstract/Summary

The Lofoten Basin Eddy (LBE) is a persistent topographically constrained anticyclonic eddy in the Norwegian Sea. Considering its local, dynamically distinct state, we test the hypothesis that the LBE has unique biogeochemical signatures. Using satellite observations and a 12-year Biogeochemical-Argo float record, we constructed a climatological view of the annual biogeochemical cycle within and surrounding the LBE. The biological carbon pump influenced by the LBE was less effective than surrounding waters, particularly during late spring. Particulate organic carbon export out of the productive zone was hindered during summer and likely associated with enhanced respiration and slower particle sinking speeds. Enhanced export into the twilight zone was also observed and consistent with shoaling of deep mixed layers in early spring, production of large particles in late summer, and subduction in late autumn; however, these mechanisms appear to be accompanied by enhanced remineralization within the LBE influence zone, highlighting the biogeochemical complexity of eddies.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1029/2024GL111937
ISSN:	0094-8276
Additional Keywords:	biogeochemical Argo floats, biological carbon pump, Lofoten basin eddy, particulate organic carbon
Date made live:	02 Jul 2025 19:51 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/539770

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