Seasonal variations in C:N:Si:Ca:P:Mg:S:K:Fe relationships of seston from Norwegian coastal water: Impact of extreme offshore forcing during winter-spring 2010
The aim of this study was to reveal the relative content of C, N, Ca, Si, P, Mg, K, S and Fe in seston particles in Norwegian coastal water (NCW), and how it relates to biological and hydrographic processes during seasonal cycles from October 2009–March 2012. The following over all stoichiometric re...
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Online Access: | https://hdl.handle.net/1956/16910 https://doi.org/10.1016/j.marchem.2017.07.001 |
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ftunivbergen:oai:bora.uib.no:1956/16910 2023-05-15T17:36:56+02:00 Seasonal variations in C:N:Si:Ca:P:Mg:S:K:Fe relationships of seston from Norwegian coastal water: Impact of extreme offshore forcing during winter-spring 2010 Erga, Svein Rune Haugen, Stig Bjarne Bratbak, Gunnar Egge, Jorun Karin Heldal, Mikal Mork, Kjell Arne Nordland, Svein 2017-08-12T13:15:14Z application/pdf https://hdl.handle.net/1956/16910 https://doi.org/10.1016/j.marchem.2017.07.001 eng eng Elsevier Norges forskningsråd: 184860 Norges forskningsråd: 225956 EC/FP7: 603773 EU: 250254 urn:issn:0304-4203 urn:issn:1872-7581 https://hdl.handle.net/1956/16910 https://doi.org/10.1016/j.marchem.2017.07.001 cristin:1485898 Attribution CC BY-NC-ND http://creativecommons.org/licenses/by-nc-nd/4.0/ Copyright 2017 The Author(s) Marine Chemistry Elemental ratios Seston Norwegian coastal water Physical forcing Peer reviewed Journal article 2017 ftunivbergen https://doi.org/10.1016/j.marchem.2017.07.001 2023-03-14T17:42:13Z The aim of this study was to reveal the relative content of C, N, Ca, Si, P, Mg, K, S and Fe in seston particles in Norwegian coastal water (NCW), and how it relates to biological and hydrographic processes during seasonal cycles from October 2009–March 2012. The following over all stoichiometric relationship for the time series was obtained: C66N11Si3.4Ca2.3P1Mg0.73S0.37K0.35Fe0.30, which is novel for marine waters. A record-breaking (187-year record) negative North Atlantic Oscillation (NAO) index caused extreme physical forcing on the Norwegian Coastal Current Water (NCCW) during the winter 2009–2010, and the inflow and upwelling of saline Atlantic water (AW) in the fjord was thus extraordinary during late spring-early summer in 2010. The element concentrations in fjord seston particles responded strongly to this convection, revealed by maximum values of all elements, except Fe, exceeding average values with 10.8 × for Ca, 9.3 for K, 5.3 for S, 5.1 for Mg, 4.6 for Si, 4.0 for P, 3.8 for C, and 3.3 for N and Fe. This indicates that the signature of the Atlantic inflow was roughly two times stronger for Ca and K than for the others, probably connected with peaks in coccolithophorids and diatoms. There is, however, 1.5 × more of Si than Ca contained in the seston, which could be due to a stronger dominance of diatoms than coccolithophorids, confirming their environmental fitness. In total our data do not indicate any severe nutrient limitation with respect to N, P and Fe, but accumulation of iron by Fe-sequestering bacteria might at times reduce the availability of the dissolved Fe-fraction. There is a high correlation between most of the measured elements, except for Ca, which together with Fe only weakly correlated with the other elements. It is to be expected that environmental alterations in NCW related to climate change will influence the seston elemental composition, but the full effect of this will be strongly dependent on the future dominance of the high pressure versus low pressure systems (i.e. NAO ... Article in Journal/Newspaper North Atlantic North Atlantic oscillation University of Bergen: Bergen Open Research Archive (BORA-UiB) Marine Chemistry 196 1 12 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Elemental ratios Seston Norwegian coastal water Physical forcing |
spellingShingle |
Elemental ratios Seston Norwegian coastal water Physical forcing Erga, Svein Rune Haugen, Stig Bjarne Bratbak, Gunnar Egge, Jorun Karin Heldal, Mikal Mork, Kjell Arne Nordland, Svein Seasonal variations in C:N:Si:Ca:P:Mg:S:K:Fe relationships of seston from Norwegian coastal water: Impact of extreme offshore forcing during winter-spring 2010 |
topic_facet |
Elemental ratios Seston Norwegian coastal water Physical forcing |
description |
The aim of this study was to reveal the relative content of C, N, Ca, Si, P, Mg, K, S and Fe in seston particles in Norwegian coastal water (NCW), and how it relates to biological and hydrographic processes during seasonal cycles from October 2009–March 2012. The following over all stoichiometric relationship for the time series was obtained: C66N11Si3.4Ca2.3P1Mg0.73S0.37K0.35Fe0.30, which is novel for marine waters. A record-breaking (187-year record) negative North Atlantic Oscillation (NAO) index caused extreme physical forcing on the Norwegian Coastal Current Water (NCCW) during the winter 2009–2010, and the inflow and upwelling of saline Atlantic water (AW) in the fjord was thus extraordinary during late spring-early summer in 2010. The element concentrations in fjord seston particles responded strongly to this convection, revealed by maximum values of all elements, except Fe, exceeding average values with 10.8 × for Ca, 9.3 for K, 5.3 for S, 5.1 for Mg, 4.6 for Si, 4.0 for P, 3.8 for C, and 3.3 for N and Fe. This indicates that the signature of the Atlantic inflow was roughly two times stronger for Ca and K than for the others, probably connected with peaks in coccolithophorids and diatoms. There is, however, 1.5 × more of Si than Ca contained in the seston, which could be due to a stronger dominance of diatoms than coccolithophorids, confirming their environmental fitness. In total our data do not indicate any severe nutrient limitation with respect to N, P and Fe, but accumulation of iron by Fe-sequestering bacteria might at times reduce the availability of the dissolved Fe-fraction. There is a high correlation between most of the measured elements, except for Ca, which together with Fe only weakly correlated with the other elements. It is to be expected that environmental alterations in NCW related to climate change will influence the seston elemental composition, but the full effect of this will be strongly dependent on the future dominance of the high pressure versus low pressure systems (i.e. NAO ... |
format |
Article in Journal/Newspaper |
author |
Erga, Svein Rune Haugen, Stig Bjarne Bratbak, Gunnar Egge, Jorun Karin Heldal, Mikal Mork, Kjell Arne Nordland, Svein |
author_facet |
Erga, Svein Rune Haugen, Stig Bjarne Bratbak, Gunnar Egge, Jorun Karin Heldal, Mikal Mork, Kjell Arne Nordland, Svein |
author_sort |
Erga, Svein Rune |
title |
Seasonal variations in C:N:Si:Ca:P:Mg:S:K:Fe relationships of seston from Norwegian coastal water: Impact of extreme offshore forcing during winter-spring 2010 |
title_short |
Seasonal variations in C:N:Si:Ca:P:Mg:S:K:Fe relationships of seston from Norwegian coastal water: Impact of extreme offshore forcing during winter-spring 2010 |
title_full |
Seasonal variations in C:N:Si:Ca:P:Mg:S:K:Fe relationships of seston from Norwegian coastal water: Impact of extreme offshore forcing during winter-spring 2010 |
title_fullStr |
Seasonal variations in C:N:Si:Ca:P:Mg:S:K:Fe relationships of seston from Norwegian coastal water: Impact of extreme offshore forcing during winter-spring 2010 |
title_full_unstemmed |
Seasonal variations in C:N:Si:Ca:P:Mg:S:K:Fe relationships of seston from Norwegian coastal water: Impact of extreme offshore forcing during winter-spring 2010 |
title_sort |
seasonal variations in c:n:si:ca:p:mg:s:k:fe relationships of seston from norwegian coastal water: impact of extreme offshore forcing during winter-spring 2010 |
publisher |
Elsevier |
publishDate |
2017 |
url |
https://hdl.handle.net/1956/16910 https://doi.org/10.1016/j.marchem.2017.07.001 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Marine Chemistry |
op_relation |
Norges forskningsråd: 184860 Norges forskningsråd: 225956 EC/FP7: 603773 EU: 250254 urn:issn:0304-4203 urn:issn:1872-7581 https://hdl.handle.net/1956/16910 https://doi.org/10.1016/j.marchem.2017.07.001 cristin:1485898 |
op_rights |
Attribution CC BY-NC-ND http://creativecommons.org/licenses/by-nc-nd/4.0/ Copyright 2017 The Author(s) |
op_doi |
https://doi.org/10.1016/j.marchem.2017.07.001 |
container_title |
Marine Chemistry |
container_volume |
196 |
container_start_page |
1 |
op_container_end_page |
12 |
_version_ |
1766136583182876672 |