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New estimates of Southern Ocean annual net community production revealed by BGC-Argo floats




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Abstract
Using an expanding Southern Ocean fleet of biogeochemical Argo (BGC-Argo) floats, we developed a novel approach to estimate annual net community production (ANCP) by integrating subsurface oxygen drawdown from all available BGC-Argo oxygen profiles. Our results suggest that, on average, 14% of remineralization occurs between 500 and 1000 m and 15% occurs between the euphotic depth and 100 m. Using the improved methodology, we estimated total basin-integrated ANCP in the Southern Ocean to be 3.89 GT C year-1 suggesting a more important role for the Southern Ocean in regulating oceanic carbon storage, atmospheric CO2 exchange and climate than previously assumed.
Item Type: | Article |
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Authors/Creators: | Su, J and Schallenberg, C and Rohr, T and Strutton, PG and Phillips, HE |
Keywords: | Southern Ocean, primary productivity |
Journal or Publication Title: | Geophysical Research Letters |
Publisher: | Amer Geophysical Union |
ISSN: | 0094-8276 |
DOI / ID Number: | https://doi.org/10.1029/2021GL097372 |
Copyright Information: | This article is protected by copyright. All rights reserved.An edited version of this paper was published by AGU. Copyright 2022 the authors. |
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