Dissolved inorganic carbon dynamics and air-sea carbon dioxide fluxes during coccolithophorid blooms in the Northeast European continental margin (northern Bay of Biscay)
We present a data-set of dissolved inorganic carbon (DIC) obtained during three cruises in the northern Bay of Biscay carried out in June 2006, May 2007, and May 2008. During these cruises, blooms of coccolithophores occurred, as indicated by patches of high reflectance on remote sensing images, phy...
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ftorbi:oai:orbi.ulg.ac.be:2268/80938 2024-04-21T08:07:58+00:00 Dissolved inorganic carbon dynamics and air-sea carbon dioxide fluxes during coccolithophorid blooms in the Northeast European continental margin (northern Bay of Biscay) Suykens, Kim Delille, Bruno Chou, Lei De Bodt, Caroline Harlay, Jérôme Borges, Alberto 2010-05-02 https://orbi.uliege.be/handle/2268/80938 https://orbi.uliege.be/bitstream/2268/80938/1/Suykens_et_al_pelagos_2010_EGU.pdf en eng https://orbi.uliege.be/handle/2268/80938 info:hdl:2268/80938 https://orbi.uliege.be/bitstream/2268/80938/1/Suykens_et_al_pelagos_2010_EGU.pdf open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess EGU General Assembly, Vienna, Austria [AT], 2-7 May 2010 Life sciences Aquatic sciences & oceanology Environmental sciences & ecology Sciences du vivant Sciences aquatiques & océanologie Sciences de l’environnement & écologie conference poster not in proceedings http://purl.org/coar/resource_type/c_18co info:eu-repo/semantics/conferencePoster 2010 ftorbi 2024-03-27T14:43:31Z We present a data-set of dissolved inorganic carbon (DIC) obtained during three cruises in the northern Bay of Biscay carried out in June 2006, May 2007, and May 2008. During these cruises, blooms of coccolithophores occurred, as indicated by patches of high reflectance on remote sensing images, phytoplankton pigment signatures, and microscopic examinations. Total alkalinity (TA) showed a non-conservative behaviour as a function of salinity due to the cumulated effect of net community calcification (NCC) during bloom development on seawater carbonate chemistry. The cumulated impact of NCC and net community production (NCP) on DIC and the partial pressure of CO2 (pCO2) were evaluated. The decrease of DIC (and increase of pCO2) due to NCC was overwhelmingly lower than the decrease of DIC (and decrease of pCO2) due to NCP (NCC:NCP « 1). During the cruises, the northern Bay of Biscay acted as a sink of atmospheric CO2 (on average -9.7 mmol C m-2 d-1 for the 3 cruises). The overall effect of NCC in decreasing the CO2 sink during the cruises was low (on average 12% of total air-sea CO2 flux). If this is a general feature in naturally occurring phytoplankton blooms in the northern North Atlantic Ocean (where coccolithophorid blooms are the most intense and recurrent), and in the global ocean, then the potential feed-back on increasing atmospheric CO2 of the projected decrease of pelagic calcification due to thermodynamic CO2 “production” from calcification is probably minor compared to feed-backs related to changes of NCP. Conference Object North Atlantic University of Liège: ORBi (Open Repository and Bibliography) |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Life sciences Aquatic sciences & oceanology Environmental sciences & ecology Sciences du vivant Sciences aquatiques & océanologie Sciences de l’environnement & écologie |
spellingShingle |
Life sciences Aquatic sciences & oceanology Environmental sciences & ecology Sciences du vivant Sciences aquatiques & océanologie Sciences de l’environnement & écologie Suykens, Kim Delille, Bruno Chou, Lei De Bodt, Caroline Harlay, Jérôme Borges, Alberto Dissolved inorganic carbon dynamics and air-sea carbon dioxide fluxes during coccolithophorid blooms in the Northeast European continental margin (northern Bay of Biscay) |
topic_facet |
Life sciences Aquatic sciences & oceanology Environmental sciences & ecology Sciences du vivant Sciences aquatiques & océanologie Sciences de l’environnement & écologie |
description |
We present a data-set of dissolved inorganic carbon (DIC) obtained during three cruises in the northern Bay of Biscay carried out in June 2006, May 2007, and May 2008. During these cruises, blooms of coccolithophores occurred, as indicated by patches of high reflectance on remote sensing images, phytoplankton pigment signatures, and microscopic examinations. Total alkalinity (TA) showed a non-conservative behaviour as a function of salinity due to the cumulated effect of net community calcification (NCC) during bloom development on seawater carbonate chemistry. The cumulated impact of NCC and net community production (NCP) on DIC and the partial pressure of CO2 (pCO2) were evaluated. The decrease of DIC (and increase of pCO2) due to NCC was overwhelmingly lower than the decrease of DIC (and decrease of pCO2) due to NCP (NCC:NCP « 1). During the cruises, the northern Bay of Biscay acted as a sink of atmospheric CO2 (on average -9.7 mmol C m-2 d-1 for the 3 cruises). The overall effect of NCC in decreasing the CO2 sink during the cruises was low (on average 12% of total air-sea CO2 flux). If this is a general feature in naturally occurring phytoplankton blooms in the northern North Atlantic Ocean (where coccolithophorid blooms are the most intense and recurrent), and in the global ocean, then the potential feed-back on increasing atmospheric CO2 of the projected decrease of pelagic calcification due to thermodynamic CO2 “production” from calcification is probably minor compared to feed-backs related to changes of NCP. |
format |
Conference Object |
author |
Suykens, Kim Delille, Bruno Chou, Lei De Bodt, Caroline Harlay, Jérôme Borges, Alberto |
author_facet |
Suykens, Kim Delille, Bruno Chou, Lei De Bodt, Caroline Harlay, Jérôme Borges, Alberto |
author_sort |
Suykens, Kim |
title |
Dissolved inorganic carbon dynamics and air-sea carbon dioxide fluxes during coccolithophorid blooms in the Northeast European continental margin (northern Bay of Biscay) |
title_short |
Dissolved inorganic carbon dynamics and air-sea carbon dioxide fluxes during coccolithophorid blooms in the Northeast European continental margin (northern Bay of Biscay) |
title_full |
Dissolved inorganic carbon dynamics and air-sea carbon dioxide fluxes during coccolithophorid blooms in the Northeast European continental margin (northern Bay of Biscay) |
title_fullStr |
Dissolved inorganic carbon dynamics and air-sea carbon dioxide fluxes during coccolithophorid blooms in the Northeast European continental margin (northern Bay of Biscay) |
title_full_unstemmed |
Dissolved inorganic carbon dynamics and air-sea carbon dioxide fluxes during coccolithophorid blooms in the Northeast European continental margin (northern Bay of Biscay) |
title_sort |
dissolved inorganic carbon dynamics and air-sea carbon dioxide fluxes during coccolithophorid blooms in the northeast european continental margin (northern bay of biscay) |
publishDate |
2010 |
url |
https://orbi.uliege.be/handle/2268/80938 https://orbi.uliege.be/bitstream/2268/80938/1/Suykens_et_al_pelagos_2010_EGU.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
EGU General Assembly, Vienna, Austria [AT], 2-7 May 2010 |
op_relation |
https://orbi.uliege.be/handle/2268/80938 info:hdl:2268/80938 https://orbi.uliege.be/bitstream/2268/80938/1/Suykens_et_al_pelagos_2010_EGU.pdf |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
_version_ |
1796948109124698112 |