New estimates of Southern Ocean annual net community production revealed by BGC-Argo floats
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 remin...
Published in: | Geophysical Research Letters |
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Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Amer Geophysical Union
2022
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Subjects: | |
Online Access: | https://doi.org/10.1029/2021GL097372 http://ecite.utas.edu.au/151148 |
Summary: | 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 CO 2 exchange and climate than previously assumed. |
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