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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
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:	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.
Related URLs:	Google Scholar: Schallenberg, C Google Scholar: Strutton, PG UTAS Profile: Strutton, PG Google Scholar: Phillips, HE UTAS Profile: Phillips, HE
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