The subpolar gyre regulates silicate concentrations in the North Atlantic
The North Atlantic is characterized by diatom-dominated spring blooms that results in significant transfer of carbon to higher trophic levels and the deep ocean. These blooms are terminated by limiting silicate concentrations in summer. Numerous regional studies have demonstrated phytoplankton commu...
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Springer Nature
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Online Access: | https://hdl.handle.net/20.500.11815/490 https://doi.org/10.1038/s41598-017-14837-4 |
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ftopinvisindi:oai:opinvisindi.is:20.500.11815/490 2024-09-15T18:02:36+00:00 The subpolar gyre regulates silicate concentrations in the North Atlantic Hátún, H. Azetsu-Scott, K. Somavilla, R. Rey, F. Johnson, C. Mathis, M. Mikolajewicz, U. Coupel, P. Tremblay, J.-É. Hartman, S. Pacariz, S. V. Salter, I. Ólafsson, Jón Jarðvísindastofnun (HÍ) Institute of Earth Sciences (UI) Verkfræði- og náttúruvísindasvið (HÍ) School of Engineering and Natural Sciences (UI) Háskóli Íslands University of Iceland 2017-11-06 14576 https://hdl.handle.net/20.500.11815/490 https://doi.org/10.1038/s41598-017-14837-4 en eng Springer Nature info:eu-repo/grantAgreement/EC/FP7/308299 NACLIM info:eu-repo/grantAgreement/EC/H2020/BG-10-2016 info:eu-repo/grantAgreement/EC/H2020/678760 Scientific Reports;7(1) Hátún, H., Azetsu-Scott, K., Somavilla, R., Rey, F., Johnson, C., Mathis, M., . . . Ólafsson, J. (2017). The subpolar gyre regulates silicate concentrations in the North Atlantic. Scientific Reports, 7(1), 14576. doi:10.1038/s41598-017-14837-4 2045-2322 https://hdl.handle.net/20.500.11815/490 Scientific Reports doi:10.1038/s41598-017-14837-4 info:eu-repo/semantics/openAccess Element cycles Marine biology Marine chemistry Physical oceanography Haffræði Sjávarlíffræði Atlantshaf info:eu-repo/semantics/article 2017 ftopinvisindi https://doi.org/20.500.11815/49010.1038/s41598-017-14837-4 2024-07-09T03:01:56Z The North Atlantic is characterized by diatom-dominated spring blooms that results in significant transfer of carbon to higher trophic levels and the deep ocean. These blooms are terminated by limiting silicate concentrations in summer. Numerous regional studies have demonstrated phytoplankton community shifts to lightly-silicified diatoms and non-silicifying plankton at the onset of silicate limitation. However, to understand basin-scale patterns in ecosystem and climate dynamics, nutrient inventories must be examined over sufficient temporal and spatial scales. Here we show, from a new comprehensive compilation of data from the subpolar Atlantic Ocean, clear evidence of a marked pre-bloom silicate decline of 1.5-2 mu M throughout the winter mixed layer during the last 25 years. This silicate decrease is primarily attributed to natural multi-decadal variability through decreased winter convection depths since the mid-1990s, a weakening and retraction of the subpolar gyre and an associated increased influence of nutrient-poor water of subtropical origin. Reduced Arctic silicate import and the projected hemispheric-scale climate change-induced weakening of vertical mixing may have acted to amplify the recent decline. These marked fluctuations in pre-bloom silicate inventories will likely have important consequences for the spatial and temporal extent of diatom blooms, thus impacting ecosystem productivity and ocean-atmosphere climate dynamics. This work was initiated through the Nordic Council of Ministers project (AEG-11323). H.H. is supported by the European Union 7th Framework Programme (n. 308299 NACLIM www.naclim.eu), the EU Horizon 2020 Blue-Action project (BG-10-2016, www.blue-action.eu) and the Danish project NAACOS 10-093903/DSF. R.S. is supported by a Marie Curie Clarin Cofund Grant (ACB-1431). S.P. was funded by the Danish government through the research center 'Climate and oceanographic changes in the marine area between Greenland and Faroes - Influences on plankton and fish'. C.J. was funded under ... Article in Journal/Newspaper Climate change Faroes Greenland North Atlantic Phytoplankton Opin vísindi (Iceland) Scientific Reports 7 1 |
institution |
Open Polar |
collection |
Opin vísindi (Iceland) |
op_collection_id |
ftopinvisindi |
language |
English |
topic |
Element cycles Marine biology Marine chemistry Physical oceanography Haffræði Sjávarlíffræði Atlantshaf |
spellingShingle |
Element cycles Marine biology Marine chemistry Physical oceanography Haffræði Sjávarlíffræði Atlantshaf Hátún, H. Azetsu-Scott, K. Somavilla, R. Rey, F. Johnson, C. Mathis, M. Mikolajewicz, U. Coupel, P. Tremblay, J.-É. Hartman, S. Pacariz, S. V. Salter, I. Ólafsson, Jón The subpolar gyre regulates silicate concentrations in the North Atlantic |
topic_facet |
Element cycles Marine biology Marine chemistry Physical oceanography Haffræði Sjávarlíffræði Atlantshaf |
description |
The North Atlantic is characterized by diatom-dominated spring blooms that results in significant transfer of carbon to higher trophic levels and the deep ocean. These blooms are terminated by limiting silicate concentrations in summer. Numerous regional studies have demonstrated phytoplankton community shifts to lightly-silicified diatoms and non-silicifying plankton at the onset of silicate limitation. However, to understand basin-scale patterns in ecosystem and climate dynamics, nutrient inventories must be examined over sufficient temporal and spatial scales. Here we show, from a new comprehensive compilation of data from the subpolar Atlantic Ocean, clear evidence of a marked pre-bloom silicate decline of 1.5-2 mu M throughout the winter mixed layer during the last 25 years. This silicate decrease is primarily attributed to natural multi-decadal variability through decreased winter convection depths since the mid-1990s, a weakening and retraction of the subpolar gyre and an associated increased influence of nutrient-poor water of subtropical origin. Reduced Arctic silicate import and the projected hemispheric-scale climate change-induced weakening of vertical mixing may have acted to amplify the recent decline. These marked fluctuations in pre-bloom silicate inventories will likely have important consequences for the spatial and temporal extent of diatom blooms, thus impacting ecosystem productivity and ocean-atmosphere climate dynamics. This work was initiated through the Nordic Council of Ministers project (AEG-11323). H.H. is supported by the European Union 7th Framework Programme (n. 308299 NACLIM www.naclim.eu), the EU Horizon 2020 Blue-Action project (BG-10-2016, www.blue-action.eu) and the Danish project NAACOS 10-093903/DSF. R.S. is supported by a Marie Curie Clarin Cofund Grant (ACB-1431). S.P. was funded by the Danish government through the research center 'Climate and oceanographic changes in the marine area between Greenland and Faroes - Influences on plankton and fish'. C.J. was funded under ... |
author2 |
Jarðvísindastofnun (HÍ) Institute of Earth Sciences (UI) Verkfræði- og náttúruvísindasvið (HÍ) School of Engineering and Natural Sciences (UI) Háskóli Íslands University of Iceland |
format |
Article in Journal/Newspaper |
author |
Hátún, H. Azetsu-Scott, K. Somavilla, R. Rey, F. Johnson, C. Mathis, M. Mikolajewicz, U. Coupel, P. Tremblay, J.-É. Hartman, S. Pacariz, S. V. Salter, I. Ólafsson, Jón |
author_facet |
Hátún, H. Azetsu-Scott, K. Somavilla, R. Rey, F. Johnson, C. Mathis, M. Mikolajewicz, U. Coupel, P. Tremblay, J.-É. Hartman, S. Pacariz, S. V. Salter, I. Ólafsson, Jón |
author_sort |
Hátún, H. |
title |
The subpolar gyre regulates silicate concentrations in the North Atlantic |
title_short |
The subpolar gyre regulates silicate concentrations in the North Atlantic |
title_full |
The subpolar gyre regulates silicate concentrations in the North Atlantic |
title_fullStr |
The subpolar gyre regulates silicate concentrations in the North Atlantic |
title_full_unstemmed |
The subpolar gyre regulates silicate concentrations in the North Atlantic |
title_sort |
subpolar gyre regulates silicate concentrations in the north atlantic |
publisher |
Springer Nature |
publishDate |
2017 |
url |
https://hdl.handle.net/20.500.11815/490 https://doi.org/10.1038/s41598-017-14837-4 |
genre |
Climate change Faroes Greenland North Atlantic Phytoplankton |
genre_facet |
Climate change Faroes Greenland North Atlantic Phytoplankton |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/308299 NACLIM info:eu-repo/grantAgreement/EC/H2020/BG-10-2016 info:eu-repo/grantAgreement/EC/H2020/678760 Scientific Reports;7(1) Hátún, H., Azetsu-Scott, K., Somavilla, R., Rey, F., Johnson, C., Mathis, M., . . . Ólafsson, J. (2017). The subpolar gyre regulates silicate concentrations in the North Atlantic. Scientific Reports, 7(1), 14576. doi:10.1038/s41598-017-14837-4 2045-2322 https://hdl.handle.net/20.500.11815/490 Scientific Reports doi:10.1038/s41598-017-14837-4 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/20.500.11815/49010.1038/s41598-017-14837-4 |
container_title |
Scientific Reports |
container_volume |
7 |
container_issue |
1 |
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1810440037441994752 |