Observation‐based estimate of net community production in Antarctic sea ice

Dalman, Laura A. ORCID: https://orcid.org/0000-0002-3931-6753; Meiners, Klaus M. ORCID: https://orcid.org/0000-0001-7118-9136; Thomas, David N. ORCID: https://orcid.org/0000-0001-8832-5907; Deman, Florian ORCID: https://orcid.org/0000-0001-6647-7360; Bestley, Sophie ORCID: https://orcid.org/0000-0001-9342-669X; Moreau, Sébastien ORCID: https://orcid.org/0000-0001-9446-812X; Arrigo, Kevin R. ORCID: https://orcid.org/0000-0002-7364-876X; Campbell, Karley ORCID: https://orcid.org/0000-0001-5008-0705; Corkill, Matthew ORCID: https://orcid.org/0000-0002-5847-3738; Cozzi, Stefano ORCID: https://orcid.org/0000-0003-0116-742X; Delille, Bruno ORCID: https://orcid.org/0000-0003-0502-8101; Fransson, Agneta ORCID: https://orcid.org/0000-0003-1403-2110; Fraser, Alexander D. ORCID: https://orcid.org/0000-0003-1924-0015; Henley, Sian F. ORCID: https://orcid.org/0000-0003-1221-1983; Janssens, Julie ORCID: https://orcid.org/0000-0003-1789-9940; Lannuzel, Delphine ORCID: https://orcid.org/0000-0001-6154-1837; Munro, David R. ORCID: https://orcid.org/0000-0002-1373-7402; Nomura, Daiki ORCID: https://orcid.org/0000-0003-3047-4023; Norman, Louisa ORCID: https://orcid.org/0000-0001-9720-4664; Papadimitriou, Stathys ORCID: https://orcid.org/0000-0001-8540-1169; Schallenberg, Christina ORCID: https://orcid.org/0000-0002-3073-7500; Tison, Jean‐Louis ORCID: https://orcid.org/0000-0002-9758-3454; Vancoppenolle, Martin ORCID: https://orcid.org/0000-0002-7573-8582; van der Merwe, Pier ORCID: https://orcid.org/0000-0002-7428-8030; Fripiat, François ORCID: https://orcid.org/0000-0002-2591-6301. 2025 Observation‐based estimate of net community production in Antarctic sea ice. Geophysical Research Letters, 52 (7). 10.1029/2024GL113717

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Text © 2025 The Author(s).This is an open access article under the terms of the Creative Commons Attribution‐Non Commercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. Geophysical Research Letters - 2025 - Dalman - Observation‐Based Estimate of Net Community Production in Antarctic Sea Ice.pdf - Published Version Available under License Creative Commons Attribution Non-commercial 4.0. Download (1MB) | Preview

Abstract/Summary

Antarctic sea ice is one of the largest biomes on Earth providing a critical habitat for ice algae. Measurements of primary production in Antarctic sea ice remain scarce and an observation-based estimate of primary production has not been revisited in over 30 years. We fill this knowledge gap by presenting a newly compiled circumpolar data set of particulate and dissolved organic carbon from 362 ice cores, sampled between 1989 and 2019, to estimate sea-ice net community production using a carbon biomass accumulation approach. Our estimate of 26.8–32.9 Tg C yr−1 accounts for at least 15%–18% of the total primary production in the Antarctic sea-ice zone, less than a previous observation-based estimate (63–70 Tg C yr−1) and consistent with recent modeled estimates. The results underpin the ecological significance of sea-ice algae as an early season resource for pelagic food webs.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1029/2024GL113717
ISSN:	0094-8276
Additional Keywords:	ice algae, net community production, organic carbon, sea ice, Antarctica
Date made live:	03 Apr 2025 14:07 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/539210

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