Fluxes of carbon and nutrients to the Iceland Sea surface layer and inferred primary productivity and stoichiometry
This study evaluates long-term mean fluxes of carbon and nutrients to the upper 100 m of the Iceland Sea. The study utilises hydro-chemical data from the Iceland Sea time series station (68.00° N, 12.67° W), for the years between 1993 and 2006. By comparing data of dissolved inorganic carbon (DIC) a...
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Language: | English |
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Online Access: | https://doi.org/10.5194/bg-12-875-2015 https://www.biogeosciences.net/12/875/2015/ |
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ftcopernicus:oai:publications.copernicus.org:bg27265 2023-05-15T16:47:11+02:00 Fluxes of carbon and nutrients to the Iceland Sea surface layer and inferred primary productivity and stoichiometry Jeansson, E. Bellerby, R. G. J. Skjelvan, I. Frigstad, H. Ólafsdóttir, S. R. Olafsson, J. 2018-09-27 info:eu-repo/semantics/application/pdf https://doi.org/10.5194/bg-12-875-2015 https://www.biogeosciences.net/12/875/2015/ eng eng info:eu-repo/grantAgreement/EC/FP7/265294 info:eu-repo/grantAgreement/EC/FP7/264933 info:eu-repo/grantAgreement/EC/FP7/264879 doi:10.5194/bg-12-875-2015 https://www.biogeosciences.net/12/875/2015/ info:eu-repo/semantics/openAccess eISSN: 1726-4189 info:eu-repo/semantics/Text 2018 ftcopernicus https://doi.org/10.5194/bg-12-875-2015 2019-12-24T09:53:47Z This study evaluates long-term mean fluxes of carbon and nutrients to the upper 100 m of the Iceland Sea. The study utilises hydro-chemical data from the Iceland Sea time series station (68.00° N, 12.67° W), for the years between 1993 and 2006. By comparing data of dissolved inorganic carbon (DIC) and nutrients in the surface layer (upper 100 m), and a sub-surface layer (100–200 m), we calculate monthly deficits in the surface, and use these to deduce the long-term mean surface layer fluxes that affect the deficits: vertical mixing, horizontal advection, air–sea exchange, and biological activity. The deficits show a clear seasonality with a minimum in winter, when the mixed layer is at the deepest, and a maximum in early autumn, when biological uptake has removed much of the nutrients. The annual vertical fluxes of DIC and nitrate amounts to 2.9 ± 0.5 and 0.45 ± 0.09 mol m −2 yr −1 , respectively, and the annual air–sea uptake of atmospheric CO 2 is 4.4 ± 1.1 mol C m −2 yr −1 . The biologically driven changes in DIC during the year relates to net community production (NCP), and the net annual NCP corresponds to export production, and is here calculated as 7.3 ± 1.0 mol C m −2 yr −1 . The typical, median C : N ratio during the period of net community uptake is 9.0, and clearly higher than the Redfield ratio, but is varying during the season. Other/Unknown Material Iceland Copernicus Publications: E-Journals Biogeosciences 12 3 875 885 |
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Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
This study evaluates long-term mean fluxes of carbon and nutrients to the upper 100 m of the Iceland Sea. The study utilises hydro-chemical data from the Iceland Sea time series station (68.00° N, 12.67° W), for the years between 1993 and 2006. By comparing data of dissolved inorganic carbon (DIC) and nutrients in the surface layer (upper 100 m), and a sub-surface layer (100–200 m), we calculate monthly deficits in the surface, and use these to deduce the long-term mean surface layer fluxes that affect the deficits: vertical mixing, horizontal advection, air–sea exchange, and biological activity. The deficits show a clear seasonality with a minimum in winter, when the mixed layer is at the deepest, and a maximum in early autumn, when biological uptake has removed much of the nutrients. The annual vertical fluxes of DIC and nitrate amounts to 2.9 ± 0.5 and 0.45 ± 0.09 mol m −2 yr −1 , respectively, and the annual air–sea uptake of atmospheric CO 2 is 4.4 ± 1.1 mol C m −2 yr −1 . The biologically driven changes in DIC during the year relates to net community production (NCP), and the net annual NCP corresponds to export production, and is here calculated as 7.3 ± 1.0 mol C m −2 yr −1 . The typical, median C : N ratio during the period of net community uptake is 9.0, and clearly higher than the Redfield ratio, but is varying during the season. |
format |
Other/Unknown Material |
author |
Jeansson, E. Bellerby, R. G. J. Skjelvan, I. Frigstad, H. Ólafsdóttir, S. R. Olafsson, J. |
spellingShingle |
Jeansson, E. Bellerby, R. G. J. Skjelvan, I. Frigstad, H. Ólafsdóttir, S. R. Olafsson, J. Fluxes of carbon and nutrients to the Iceland Sea surface layer and inferred primary productivity and stoichiometry |
author_facet |
Jeansson, E. Bellerby, R. G. J. Skjelvan, I. Frigstad, H. Ólafsdóttir, S. R. Olafsson, J. |
author_sort |
Jeansson, E. |
title |
Fluxes of carbon and nutrients to the Iceland Sea surface layer and inferred primary productivity and stoichiometry |
title_short |
Fluxes of carbon and nutrients to the Iceland Sea surface layer and inferred primary productivity and stoichiometry |
title_full |
Fluxes of carbon and nutrients to the Iceland Sea surface layer and inferred primary productivity and stoichiometry |
title_fullStr |
Fluxes of carbon and nutrients to the Iceland Sea surface layer and inferred primary productivity and stoichiometry |
title_full_unstemmed |
Fluxes of carbon and nutrients to the Iceland Sea surface layer and inferred primary productivity and stoichiometry |
title_sort |
fluxes of carbon and nutrients to the iceland sea surface layer and inferred primary productivity and stoichiometry |
publishDate |
2018 |
url |
https://doi.org/10.5194/bg-12-875-2015 https://www.biogeosciences.net/12/875/2015/ |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
eISSN: 1726-4189 |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/265294 info:eu-repo/grantAgreement/EC/FP7/264933 info:eu-repo/grantAgreement/EC/FP7/264879 doi:10.5194/bg-12-875-2015 https://www.biogeosciences.net/12/875/2015/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-12-875-2015 |
container_title |
Biogeosciences |
container_volume |
12 |
container_issue |
3 |
container_start_page |
875 |
op_container_end_page |
885 |
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1766037273937182720 |