Supplementary material from "Nitrate supply and uptake in the Atlantic Arctic sea ice zone: seasonal cycle, mechanisms and drivers"
Nutrient supply to the surface ocean is a key factor regulating primary production in the Arctic Ocean under current conditions and with ongoing warming and sea ice losses. Here, we present seasonal nitrate concentration and hydrographic data from two oceanographic moorings on the northern Barents s...
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ftdatacite:10.6084/m9.figshare.c.5069823 2023-05-15T14:43:20+02:00 Supplementary material from "Nitrate supply and uptake in the Atlantic Arctic sea ice zone: seasonal cycle, mechanisms and drivers" Henley, Sian F. Porter, Marie Hobbs, Laura Braun, Judith Guillaume-Castel, Robin Venables, Emily J. Dumont, Estelle Finlo Cottier 2020 https://dx.doi.org/10.6084/m9.figshare.c.5069823 https://rs.figshare.com/collections/Supplementary_material_from_Nitrate_supply_and_uptake_in_the_Atlantic_Arctic_sea_ice_zone_seasonal_cycle_mechanisms_and_drivers_/5069823 unknown The Royal Society https://dx.doi.org/10.1098/rsta.2019.0361 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Environmental Chemistry Geochemistry FOS Earth and related environmental sciences Oceanography Collection article 2020 ftdatacite https://doi.org/10.6084/m9.figshare.c.5069823 https://doi.org/10.1098/rsta.2019.0361 2021-11-05T12:55:41Z Nutrient supply to the surface ocean is a key factor regulating primary production in the Arctic Ocean under current conditions and with ongoing warming and sea ice losses. Here, we present seasonal nitrate concentration and hydrographic data from two oceanographic moorings on the northern Barents shelf between autumn 2017 and summer 2018. The eastern mooring was sea ice-covered to varying degrees during autumn, winter and spring, and was characterized by more Arctic-like oceanographic conditions, while the western mooring was ice-free year-round and showed a greater influence of Atlantic water masses. The seasonal cycle in nitrate dynamics was similar under ice-influenced and ice-free conditions, with biological nitrate uptake beginning near-synchronously in early May, but important differences between the moorings were observed. Nitrate supply to the surface ocean preceding and during the period of rapid drawdown was greater at the ice-free more Atlantic-like western mooring, and nitrate drawdown occurred more slowly over a longer period of time. This suggests that with ongoing sea ice losses and Atlantification, the expected shift from more Arctic-like ice-influenced conditions to more Atlantic-like ice-free conditions is likely to increase nutrient availability and the duration of seasonal drawdown in this Arctic shelf region. The extent to which this increased nutrient availability and longer drawdown periods will lead to increases in total nitrate uptake, and support the projected increases in primary production, will depend on changes in upper ocean stratification and their effect on light availability to phytoplankton as changes in climate and the physical environment proceed.This article is part of the theme issue ‘The changing Arctic Ocean: consequences for biological communities, biogeochemical processes and ecosystems'. Article in Journal/Newspaper Arctic Arctic Ocean Atlantic Arctic Atlantic-Arctic Phytoplankton Sea ice DataCite Metadata Store (German National Library of Science and Technology) Arctic Arctic Ocean |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Environmental Chemistry Geochemistry FOS Earth and related environmental sciences Oceanography |
spellingShingle |
Environmental Chemistry Geochemistry FOS Earth and related environmental sciences Oceanography Henley, Sian F. Porter, Marie Hobbs, Laura Braun, Judith Guillaume-Castel, Robin Venables, Emily J. Dumont, Estelle Finlo Cottier Supplementary material from "Nitrate supply and uptake in the Atlantic Arctic sea ice zone: seasonal cycle, mechanisms and drivers" |
topic_facet |
Environmental Chemistry Geochemistry FOS Earth and related environmental sciences Oceanography |
description |
Nutrient supply to the surface ocean is a key factor regulating primary production in the Arctic Ocean under current conditions and with ongoing warming and sea ice losses. Here, we present seasonal nitrate concentration and hydrographic data from two oceanographic moorings on the northern Barents shelf between autumn 2017 and summer 2018. The eastern mooring was sea ice-covered to varying degrees during autumn, winter and spring, and was characterized by more Arctic-like oceanographic conditions, while the western mooring was ice-free year-round and showed a greater influence of Atlantic water masses. The seasonal cycle in nitrate dynamics was similar under ice-influenced and ice-free conditions, with biological nitrate uptake beginning near-synchronously in early May, but important differences between the moorings were observed. Nitrate supply to the surface ocean preceding and during the period of rapid drawdown was greater at the ice-free more Atlantic-like western mooring, and nitrate drawdown occurred more slowly over a longer period of time. This suggests that with ongoing sea ice losses and Atlantification, the expected shift from more Arctic-like ice-influenced conditions to more Atlantic-like ice-free conditions is likely to increase nutrient availability and the duration of seasonal drawdown in this Arctic shelf region. The extent to which this increased nutrient availability and longer drawdown periods will lead to increases in total nitrate uptake, and support the projected increases in primary production, will depend on changes in upper ocean stratification and their effect on light availability to phytoplankton as changes in climate and the physical environment proceed.This article is part of the theme issue ‘The changing Arctic Ocean: consequences for biological communities, biogeochemical processes and ecosystems'. |
format |
Article in Journal/Newspaper |
author |
Henley, Sian F. Porter, Marie Hobbs, Laura Braun, Judith Guillaume-Castel, Robin Venables, Emily J. Dumont, Estelle Finlo Cottier |
author_facet |
Henley, Sian F. Porter, Marie Hobbs, Laura Braun, Judith Guillaume-Castel, Robin Venables, Emily J. Dumont, Estelle Finlo Cottier |
author_sort |
Henley, Sian F. |
title |
Supplementary material from "Nitrate supply and uptake in the Atlantic Arctic sea ice zone: seasonal cycle, mechanisms and drivers" |
title_short |
Supplementary material from "Nitrate supply and uptake in the Atlantic Arctic sea ice zone: seasonal cycle, mechanisms and drivers" |
title_full |
Supplementary material from "Nitrate supply and uptake in the Atlantic Arctic sea ice zone: seasonal cycle, mechanisms and drivers" |
title_fullStr |
Supplementary material from "Nitrate supply and uptake in the Atlantic Arctic sea ice zone: seasonal cycle, mechanisms and drivers" |
title_full_unstemmed |
Supplementary material from "Nitrate supply and uptake in the Atlantic Arctic sea ice zone: seasonal cycle, mechanisms and drivers" |
title_sort |
supplementary material from "nitrate supply and uptake in the atlantic arctic sea ice zone: seasonal cycle, mechanisms and drivers" |
publisher |
The Royal Society |
publishDate |
2020 |
url |
https://dx.doi.org/10.6084/m9.figshare.c.5069823 https://rs.figshare.com/collections/Supplementary_material_from_Nitrate_supply_and_uptake_in_the_Atlantic_Arctic_sea_ice_zone_seasonal_cycle_mechanisms_and_drivers_/5069823 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Atlantic Arctic Atlantic-Arctic Phytoplankton Sea ice |
genre_facet |
Arctic Arctic Ocean Atlantic Arctic Atlantic-Arctic Phytoplankton Sea ice |
op_relation |
https://dx.doi.org/10.1098/rsta.2019.0361 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.c.5069823 https://doi.org/10.1098/rsta.2019.0361 |
_version_ |
1766315001400786944 |