What drives the seasonality of air-sea CO 2 fluxes in the ice-free zone of the Southern Ocean: A 1D coupled physical-biogeochemical model approach
The complex biogeochemical SWAMCO-3 model has been used to assess the response of the ice-free Southern Ocean to the physical and biological mechanisms governing air-sea CO 2 exchanges. For this application, the model explicitly details the dynamics of three Phytoplankton Functional Types (PFTs) of...
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Online Access: | https://doi.org/10.1016/j.marchem.2015.08.008 http://ecite.utas.edu.au/110754 |
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ftunivtasecite:oai:ecite.utas.edu.au:110754 2023-05-15T18:25:13+02:00 What drives the seasonality of air-sea CO 2 fluxes in the ice-free zone of the Southern Ocean: A 1D coupled physical-biogeochemical model approach Pasquer, B Metzl, N Goosse, H Lancelot, C 2015 https://doi.org/10.1016/j.marchem.2015.08.008 http://ecite.utas.edu.au/110754 en eng Elsevier Science Bv http://dx.doi.org/10.1016/j.marchem.2015.08.008 Pasquer, B and Metzl, N and Goosse, H and Lancelot, C, What drives the seasonality of air-sea CO 2 fluxes in the ice-free zone of the Southern Ocean: A 1D coupled physical-biogeochemical model approach, Marine Chemistry, 177 pp. 554-565. ISSN 0304-4203 (2015) [Refereed Article] http://ecite.utas.edu.au/110754 Earth Sciences Atmospheric Sciences Atmospheric Dynamics Refereed Article PeerReviewed 2015 ftunivtasecite https://doi.org/10.1016/j.marchem.2015.08.008 2019-12-13T22:11:11Z The complex biogeochemical SWAMCO-3 model has been used to assess the response of the ice-free Southern Ocean to the physical and biological mechanisms governing air-sea CO 2 exchanges. For this application, the model explicitly details the dynamics of three Phytoplankton Functional Types (PFTs) of importance for C, N, P, Si, Fe cycling and air-sea CO 2 exchange in this area. These are the diatoms, the pico-nanophytoplankton and the coccolithophores whose growth regulation by light, temperature and nutrients has been obtained from a literature review of phenomenological observations available for these PFTs. The performance of the SWAMCO-3 model coupled to a vertical one-dimensional physical model was first assessed at the location of the JGOFS time-series station KERFIX. The model was able to reproduce a mean seasonal cycle based on years where a maximum of chemical and biological observations are available at this location (1993-1994, 1994-1995, 1998-1999 and 2000-2001). Ocean fCO 2 in equilibrium with the atmosphere are simulated both in Austral winter associated with surface layer replenishment in DIC due to deep vertical mixing and in late summer as a consequence of the warming effect on the carbonate system. A clear under-saturation is found in spring/summer. Analysis of the modelled seasonal biogeochemical and physical features shows that thermodynamical conditions are driving the air-sea exchange of CO 2 in the region, while the biological activity under the control of light and iron availability, is responsible for the predicted relatively modest annual carbon sink (-0.9 mol C m -2 y -1 ). Article in Journal/Newspaper Southern Ocean eCite UTAS (University of Tasmania) Austral Southern Ocean Marine Chemistry 177 554 565 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Atmospheric Sciences Atmospheric Dynamics |
spellingShingle |
Earth Sciences Atmospheric Sciences Atmospheric Dynamics Pasquer, B Metzl, N Goosse, H Lancelot, C What drives the seasonality of air-sea CO 2 fluxes in the ice-free zone of the Southern Ocean: A 1D coupled physical-biogeochemical model approach |
topic_facet |
Earth Sciences Atmospheric Sciences Atmospheric Dynamics |
description |
The complex biogeochemical SWAMCO-3 model has been used to assess the response of the ice-free Southern Ocean to the physical and biological mechanisms governing air-sea CO 2 exchanges. For this application, the model explicitly details the dynamics of three Phytoplankton Functional Types (PFTs) of importance for C, N, P, Si, Fe cycling and air-sea CO 2 exchange in this area. These are the diatoms, the pico-nanophytoplankton and the coccolithophores whose growth regulation by light, temperature and nutrients has been obtained from a literature review of phenomenological observations available for these PFTs. The performance of the SWAMCO-3 model coupled to a vertical one-dimensional physical model was first assessed at the location of the JGOFS time-series station KERFIX. The model was able to reproduce a mean seasonal cycle based on years where a maximum of chemical and biological observations are available at this location (1993-1994, 1994-1995, 1998-1999 and 2000-2001). Ocean fCO 2 in equilibrium with the atmosphere are simulated both in Austral winter associated with surface layer replenishment in DIC due to deep vertical mixing and in late summer as a consequence of the warming effect on the carbonate system. A clear under-saturation is found in spring/summer. Analysis of the modelled seasonal biogeochemical and physical features shows that thermodynamical conditions are driving the air-sea exchange of CO 2 in the region, while the biological activity under the control of light and iron availability, is responsible for the predicted relatively modest annual carbon sink (-0.9 mol C m -2 y -1 ). |
format |
Article in Journal/Newspaper |
author |
Pasquer, B Metzl, N Goosse, H Lancelot, C |
author_facet |
Pasquer, B Metzl, N Goosse, H Lancelot, C |
author_sort |
Pasquer, B |
title |
What drives the seasonality of air-sea CO 2 fluxes in the ice-free zone of the Southern Ocean: A 1D coupled physical-biogeochemical model approach |
title_short |
What drives the seasonality of air-sea CO 2 fluxes in the ice-free zone of the Southern Ocean: A 1D coupled physical-biogeochemical model approach |
title_full |
What drives the seasonality of air-sea CO 2 fluxes in the ice-free zone of the Southern Ocean: A 1D coupled physical-biogeochemical model approach |
title_fullStr |
What drives the seasonality of air-sea CO 2 fluxes in the ice-free zone of the Southern Ocean: A 1D coupled physical-biogeochemical model approach |
title_full_unstemmed |
What drives the seasonality of air-sea CO 2 fluxes in the ice-free zone of the Southern Ocean: A 1D coupled physical-biogeochemical model approach |
title_sort |
what drives the seasonality of air-sea co 2 fluxes in the ice-free zone of the southern ocean: a 1d coupled physical-biogeochemical model approach |
publisher |
Elsevier Science Bv |
publishDate |
2015 |
url |
https://doi.org/10.1016/j.marchem.2015.08.008 http://ecite.utas.edu.au/110754 |
geographic |
Austral Southern Ocean |
geographic_facet |
Austral Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
http://dx.doi.org/10.1016/j.marchem.2015.08.008 Pasquer, B and Metzl, N and Goosse, H and Lancelot, C, What drives the seasonality of air-sea CO 2 fluxes in the ice-free zone of the Southern Ocean: A 1D coupled physical-biogeochemical model approach, Marine Chemistry, 177 pp. 554-565. ISSN 0304-4203 (2015) [Refereed Article] http://ecite.utas.edu.au/110754 |
op_doi |
https://doi.org/10.1016/j.marchem.2015.08.008 |
container_title |
Marine Chemistry |
container_volume |
177 |
container_start_page |
554 |
op_container_end_page |
565 |
_version_ |
1766206502282985472 |