Pan-Arctic Ocean Primary Production Constrained by Turbulent Nitrate Fluxes
Arctic Ocean primary productivity is limited by light and inorganic nutrients. With sea ice cover declining in recent decades, nitrate limitation has been speculated to become more prominent. Although much has been learned about nitrate supply from general patterns of ocean circulation and water col...
Published in: | Frontiers in Marine Science |
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ftawi:oai:epic.awi.de:52595 2023-05-15T14:27:25+02:00 Pan-Arctic Ocean Primary Production Constrained by Turbulent Nitrate Fluxes Randelhoff, Achim Holding, Johnna Janout, Markus Sejr, Mikael Kristian Babin, Marcel Tremblay, Jean-Éric Alkire, Matthew B. 2020 application/pdf https://epic.awi.de/id/eprint/52595/ https://epic.awi.de/id/eprint/52595/1/fmars-07-00150%281%29.pdf https://doi.org/10.3389/fmars.2020.00150 https://hdl.handle.net/10013/epic.8347d454-d25d-4fb8-8ed0-80bc4fca77ff https://hdl.handle.net/ unknown https://epic.awi.de/id/eprint/52595/1/fmars-07-00150%281%29.pdf https://hdl.handle.net/ Randelhoff, A. , Holding, J. , Janout, M. orcid:0000-0003-4908-2855 , Sejr, M. K. , Babin, M. , Tremblay, J. É. and Alkire, M. B. (2020) Pan-Arctic Ocean Primary Production Constrained by Turbulent Nitrate Fluxes , Frontiers in Marine Science, 7 . doi:10.3389/fmars.2020.00150 <https://doi.org/10.3389/fmars.2020.00150> , hdl:10013/epic.8347d454-d25d-4fb8-8ed0-80bc4fca77ff EPIC3Frontiers in Marine Science, 7, ISSN: 2296-7745 Article isiRev 2020 ftawi https://doi.org/10.3389/fmars.2020.00150 2021-12-24T15:45:47Z Arctic Ocean primary productivity is limited by light and inorganic nutrients. With sea ice cover declining in recent decades, nitrate limitation has been speculated to become more prominent. Although much has been learned about nitrate supply from general patterns of ocean circulation and water column stability, a quantitative analysis requires dedicated turbulence measurements that have only started to accumulate in the last dozen years. Here we present new observations of the turbulent vertical nitrate flux in the Laptev Sea, Baffin Bay, and Young Sound (North-East Greenland), supplementing a compilation of 13 published estimates throughout the Arctic Ocean. Combining all flux estimates with a Pan-Arctic database of in situ measurements of nitrate concentration and density, we found the annual nitrate inventory to be largely determined by the strength of stratification and by bathymetry. Nitrate fluxes explained the observed regional patterns and magnitudes of both new primary production and particle export on annual scales. We argue that with few regional exceptions, vertical turbulent nitrate fluxes can be a reliable proxy of Arctic primary production accessible through autonomous and large-scale measurements. They may also provide a framework to assess nutrient limitation scenarios based on clear energetic and mass budget constraints resulting from turbulent mixing and freshwater flows. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin East Greenland Greenland laptev Laptev Sea Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Arctic Ocean Baffin Bay Greenland Laptev Sea Frontiers in Marine Science 7 |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Arctic Ocean primary productivity is limited by light and inorganic nutrients. With sea ice cover declining in recent decades, nitrate limitation has been speculated to become more prominent. Although much has been learned about nitrate supply from general patterns of ocean circulation and water column stability, a quantitative analysis requires dedicated turbulence measurements that have only started to accumulate in the last dozen years. Here we present new observations of the turbulent vertical nitrate flux in the Laptev Sea, Baffin Bay, and Young Sound (North-East Greenland), supplementing a compilation of 13 published estimates throughout the Arctic Ocean. Combining all flux estimates with a Pan-Arctic database of in situ measurements of nitrate concentration and density, we found the annual nitrate inventory to be largely determined by the strength of stratification and by bathymetry. Nitrate fluxes explained the observed regional patterns and magnitudes of both new primary production and particle export on annual scales. We argue that with few regional exceptions, vertical turbulent nitrate fluxes can be a reliable proxy of Arctic primary production accessible through autonomous and large-scale measurements. They may also provide a framework to assess nutrient limitation scenarios based on clear energetic and mass budget constraints resulting from turbulent mixing and freshwater flows. |
format |
Article in Journal/Newspaper |
author |
Randelhoff, Achim Holding, Johnna Janout, Markus Sejr, Mikael Kristian Babin, Marcel Tremblay, Jean-Éric Alkire, Matthew B. |
spellingShingle |
Randelhoff, Achim Holding, Johnna Janout, Markus Sejr, Mikael Kristian Babin, Marcel Tremblay, Jean-Éric Alkire, Matthew B. Pan-Arctic Ocean Primary Production Constrained by Turbulent Nitrate Fluxes |
author_facet |
Randelhoff, Achim Holding, Johnna Janout, Markus Sejr, Mikael Kristian Babin, Marcel Tremblay, Jean-Éric Alkire, Matthew B. |
author_sort |
Randelhoff, Achim |
title |
Pan-Arctic Ocean Primary Production Constrained by Turbulent Nitrate Fluxes |
title_short |
Pan-Arctic Ocean Primary Production Constrained by Turbulent Nitrate Fluxes |
title_full |
Pan-Arctic Ocean Primary Production Constrained by Turbulent Nitrate Fluxes |
title_fullStr |
Pan-Arctic Ocean Primary Production Constrained by Turbulent Nitrate Fluxes |
title_full_unstemmed |
Pan-Arctic Ocean Primary Production Constrained by Turbulent Nitrate Fluxes |
title_sort |
pan-arctic ocean primary production constrained by turbulent nitrate fluxes |
publishDate |
2020 |
url |
https://epic.awi.de/id/eprint/52595/ https://epic.awi.de/id/eprint/52595/1/fmars-07-00150%281%29.pdf https://doi.org/10.3389/fmars.2020.00150 https://hdl.handle.net/10013/epic.8347d454-d25d-4fb8-8ed0-80bc4fca77ff https://hdl.handle.net/ |
geographic |
Arctic Arctic Ocean Baffin Bay Greenland Laptev Sea |
geographic_facet |
Arctic Arctic Ocean Baffin Bay Greenland Laptev Sea |
genre |
Arctic Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin East Greenland Greenland laptev Laptev Sea Sea ice |
genre_facet |
Arctic Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin East Greenland Greenland laptev Laptev Sea Sea ice |
op_source |
EPIC3Frontiers in Marine Science, 7, ISSN: 2296-7745 |
op_relation |
https://epic.awi.de/id/eprint/52595/1/fmars-07-00150%281%29.pdf https://hdl.handle.net/ Randelhoff, A. , Holding, J. , Janout, M. orcid:0000-0003-4908-2855 , Sejr, M. K. , Babin, M. , Tremblay, J. É. and Alkire, M. B. (2020) Pan-Arctic Ocean Primary Production Constrained by Turbulent Nitrate Fluxes , Frontiers in Marine Science, 7 . doi:10.3389/fmars.2020.00150 <https://doi.org/10.3389/fmars.2020.00150> , hdl:10013/epic.8347d454-d25d-4fb8-8ed0-80bc4fca77ff |
op_doi |
https://doi.org/10.3389/fmars.2020.00150 |
container_title |
Frontiers in Marine Science |
container_volume |
7 |
_version_ |
1766301148301492224 |