The Southern Ocean Carbon Cycle 1985–2018: Mean, Seasonal Cycle, Trends, and Storage
We assess the Southern Ocean CO2 uptake (1985–2018) using data sets gathered in the REgional Carbon Cycle Assessment and Processes Project Phase 2. The Southern Ocean acted as a sink for CO2 with close agreement between simulation results from global ocean biogeochemistry models (GOBMs, 0.75 ± 0.28...
Published in: | Global Biogeochemical Cycles |
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American Geophysical Union (AGU)
2023
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Online Access: | https://epic.awi.de/id/eprint/58182/ https://epic.awi.de/id/eprint/58182/7/Hauck_The_Southern_Ocean_Carbon_Cycle_1985-2018_Mean_S.pdf https://doi.org/10.1029/2023gb007848 https://hdl.handle.net/10013/epic.c7b047cc-b76d-4121-90f4-fd9bfa458525 |
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ftawi:oai:epic.awi.de:58182 2024-01-21T10:10:34+01:00 The Southern Ocean Carbon Cycle 1985–2018: Mean, Seasonal Cycle, Trends, and Storage Hauck, Judith Gregor, Luke Nissen, Cara Patara, Lavinia Hague, Mark Mongwe, Precious Bushinsky, Seth Doney, Scott C Gruber, Nicolas Le Quéré, Corinne Manizza, Manfredi Mazloff, Matthew Monteiro, Pedro MS Terhaar, Jens 2023-11 application/pdf https://epic.awi.de/id/eprint/58182/ https://epic.awi.de/id/eprint/58182/7/Hauck_The_Southern_Ocean_Carbon_Cycle_1985-2018_Mean_S.pdf https://doi.org/10.1029/2023gb007848 https://hdl.handle.net/10013/epic.c7b047cc-b76d-4121-90f4-fd9bfa458525 unknown American Geophysical Union (AGU) https://epic.awi.de/id/eprint/58182/7/Hauck_The_Southern_Ocean_Carbon_Cycle_1985-2018_Mean_S.pdf Hauck, J. orcid:0000-0003-4723-9652 , Gregor, L. , Nissen, C. , Patara, L. , Hague, M. , Mongwe, P. , Bushinsky, S. , Doney, S. C. , Gruber, N. , Le Quéré, C. , Manizza, M. , Mazloff, M. , Monteiro, P. M. and Terhaar, J. (2023) The Southern Ocean Carbon Cycle 1985–2018: Mean, Seasonal Cycle, Trends, and Storage , Global Biogeochemical Cycles, 37 (11) . doi:10.1029/2023gb007848 <https://doi.org/10.1029/2023gb007848> , hdl:10013/epic.c7b047cc-b76d-4121-90f4-fd9bfa458525 EPIC3Global Biogeochemical Cycles, American Geophysical Union (AGU), 37(11), ISSN: 0886-6236 Article isiRev 2023 ftawi https://doi.org/10.1029/2023gb007848 2023-12-25T00:23:13Z We assess the Southern Ocean CO2 uptake (1985–2018) using data sets gathered in the REgional Carbon Cycle Assessment and Processes Project Phase 2. The Southern Ocean acted as a sink for CO2 with close agreement between simulation results from global ocean biogeochemistry models (GOBMs, 0.75 ± 0.28 PgC yr−1) and pCO2-observation-based products (0.73 ± 0.07 PgC yr−1). This sink is only half that reported by RECCAP1 for the same region and timeframe. The present-day net uptake is to first order a response to rising atmospheric CO2, driving large amounts of anthropogenic CO2 (Cant) into the ocean, thereby overcompensating the loss of natural CO2 to the atmosphere. An apparent knowledge gap is the increase of the sink since 2000, with pCO2-products suggesting a growth that is more than twice as strong and uncertain as that of GOBMs (0.26 ± 0.06 and 0.11 ± 0.03 Pg C yr−1 decade−1, respectively). This is despite nearly identical pCO2 trends in GOBMs and pCO2-products when both products are compared only at the locations where pCO2 was measured. Seasonal analyses revealed agreement in driving processes in winter with uncertainty in the magnitude of outgassing, whereas discrepancies are more fundamental in summer, when GOBMs exhibit difficulties in simulating the effects of the non-thermal processes of biology and mixing/circulation. Ocean interior accumulation of Cant points to an underestimate of Cant uptake and storage in GOBMs. Future work needs to link surface fluxes and interior ocean transport, build long overdue systematic observation networks and push toward better process understanding of drivers of the carbon cycle. Article in Journal/Newspaper Southern Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Southern Ocean Global Biogeochemical Cycles 37 11 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
We assess the Southern Ocean CO2 uptake (1985–2018) using data sets gathered in the REgional Carbon Cycle Assessment and Processes Project Phase 2. The Southern Ocean acted as a sink for CO2 with close agreement between simulation results from global ocean biogeochemistry models (GOBMs, 0.75 ± 0.28 PgC yr−1) and pCO2-observation-based products (0.73 ± 0.07 PgC yr−1). This sink is only half that reported by RECCAP1 for the same region and timeframe. The present-day net uptake is to first order a response to rising atmospheric CO2, driving large amounts of anthropogenic CO2 (Cant) into the ocean, thereby overcompensating the loss of natural CO2 to the atmosphere. An apparent knowledge gap is the increase of the sink since 2000, with pCO2-products suggesting a growth that is more than twice as strong and uncertain as that of GOBMs (0.26 ± 0.06 and 0.11 ± 0.03 Pg C yr−1 decade−1, respectively). This is despite nearly identical pCO2 trends in GOBMs and pCO2-products when both products are compared only at the locations where pCO2 was measured. Seasonal analyses revealed agreement in driving processes in winter with uncertainty in the magnitude of outgassing, whereas discrepancies are more fundamental in summer, when GOBMs exhibit difficulties in simulating the effects of the non-thermal processes of biology and mixing/circulation. Ocean interior accumulation of Cant points to an underestimate of Cant uptake and storage in GOBMs. Future work needs to link surface fluxes and interior ocean transport, build long overdue systematic observation networks and push toward better process understanding of drivers of the carbon cycle. |
format |
Article in Journal/Newspaper |
author |
Hauck, Judith Gregor, Luke Nissen, Cara Patara, Lavinia Hague, Mark Mongwe, Precious Bushinsky, Seth Doney, Scott C Gruber, Nicolas Le Quéré, Corinne Manizza, Manfredi Mazloff, Matthew Monteiro, Pedro MS Terhaar, Jens |
spellingShingle |
Hauck, Judith Gregor, Luke Nissen, Cara Patara, Lavinia Hague, Mark Mongwe, Precious Bushinsky, Seth Doney, Scott C Gruber, Nicolas Le Quéré, Corinne Manizza, Manfredi Mazloff, Matthew Monteiro, Pedro MS Terhaar, Jens The Southern Ocean Carbon Cycle 1985–2018: Mean, Seasonal Cycle, Trends, and Storage |
author_facet |
Hauck, Judith Gregor, Luke Nissen, Cara Patara, Lavinia Hague, Mark Mongwe, Precious Bushinsky, Seth Doney, Scott C Gruber, Nicolas Le Quéré, Corinne Manizza, Manfredi Mazloff, Matthew Monteiro, Pedro MS Terhaar, Jens |
author_sort |
Hauck, Judith |
title |
The Southern Ocean Carbon Cycle 1985–2018: Mean, Seasonal Cycle, Trends, and Storage |
title_short |
The Southern Ocean Carbon Cycle 1985–2018: Mean, Seasonal Cycle, Trends, and Storage |
title_full |
The Southern Ocean Carbon Cycle 1985–2018: Mean, Seasonal Cycle, Trends, and Storage |
title_fullStr |
The Southern Ocean Carbon Cycle 1985–2018: Mean, Seasonal Cycle, Trends, and Storage |
title_full_unstemmed |
The Southern Ocean Carbon Cycle 1985–2018: Mean, Seasonal Cycle, Trends, and Storage |
title_sort |
southern ocean carbon cycle 1985–2018: mean, seasonal cycle, trends, and storage |
publisher |
American Geophysical Union (AGU) |
publishDate |
2023 |
url |
https://epic.awi.de/id/eprint/58182/ https://epic.awi.de/id/eprint/58182/7/Hauck_The_Southern_Ocean_Carbon_Cycle_1985-2018_Mean_S.pdf https://doi.org/10.1029/2023gb007848 https://hdl.handle.net/10013/epic.c7b047cc-b76d-4121-90f4-fd9bfa458525 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
EPIC3Global Biogeochemical Cycles, American Geophysical Union (AGU), 37(11), ISSN: 0886-6236 |
op_relation |
https://epic.awi.de/id/eprint/58182/7/Hauck_The_Southern_Ocean_Carbon_Cycle_1985-2018_Mean_S.pdf Hauck, J. orcid:0000-0003-4723-9652 , Gregor, L. , Nissen, C. , Patara, L. , Hague, M. , Mongwe, P. , Bushinsky, S. , Doney, S. C. , Gruber, N. , Le Quéré, C. , Manizza, M. , Mazloff, M. , Monteiro, P. M. and Terhaar, J. (2023) The Southern Ocean Carbon Cycle 1985–2018: Mean, Seasonal Cycle, Trends, and Storage , Global Biogeochemical Cycles, 37 (11) . doi:10.1029/2023gb007848 <https://doi.org/10.1029/2023gb007848> , hdl:10013/epic.c7b047cc-b76d-4121-90f4-fd9bfa458525 |
op_doi |
https://doi.org/10.1029/2023gb007848 |
container_title |
Global Biogeochemical Cycles |
container_volume |
37 |
container_issue |
11 |
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1788701937321902080 |