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Annual cycle of downward particle fluxes on each side of the Gakkel Ridge in the central Arctic Ocean

Two mooring arrays carrying sediment traps were deployed from September 2011 to August 2012 at ∼83°N on each side of the Gakkel Ridge in the Nansen and Amundsen Basins to measure downward particle flux below the euphotic zone (approx. 250 m) and approximately 150 m above seafloor at approximately 35...

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Autores principales: Nöthig, Eva-Maria, Lalande, Catherine, Fahl, Kirsten, Metfies, Katja, Salter, Ian, Bauerfeind, Eduard
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society Publishing 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7481669/
https://www.ncbi.nlm.nih.gov/pubmed/32862819
http://dx.doi.org/10.1098/rsta.2019.0368
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author Nöthig, Eva-Maria
Lalande, Catherine
Fahl, Kirsten
Metfies, Katja
Salter, Ian
Bauerfeind, Eduard
author_facet Nöthig, Eva-Maria
Lalande, Catherine
Fahl, Kirsten
Metfies, Katja
Salter, Ian
Bauerfeind, Eduard
author_sort Nöthig, Eva-Maria
collection PubMed
description Two mooring arrays carrying sediment traps were deployed from September 2011 to August 2012 at ∼83°N on each side of the Gakkel Ridge in the Nansen and Amundsen Basins to measure downward particle flux below the euphotic zone (approx. 250 m) and approximately 150 m above seafloor at approximately 3500 and 4000 m depth, respectively. In a region that still experiences nearly complete ice cover throughout the year, export fluxes of total particulate matter (TPM), particulate organic carbon (POC), particulate nitrogen (PN), biogenic matter, lithogenic matter, biogenic particulate silica (bPSi), calcium carbonate (CaCO(3)), protists and biomarkers only slightly decreased with depth. Seasonal variations of particulate matter fluxes were similar on both sides of the Gakkel Ridge. Somewhat higher export rates in the Amundsen Basin and differences in the composition of the sinking TPM and bPSi on each side of the Gakkel Ridge probably reflected the influence of the Lena River/Transpolar Drift in the Amundsen Basin and the influence of Atlantic water in the Nansen Basin. Low variations in particle export with depth revealed a limited influence of lateral advection in the deep barren Eurasian Basin. This article is part of the theme issue ‘The changing Arctic Ocean: consequences for biological communities, biogeochemical processes and ecosystem functioning’.
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spelling pubmed-74816692020-09-17 Annual cycle of downward particle fluxes on each side of the Gakkel Ridge in the central Arctic Ocean Nöthig, Eva-Maria Lalande, Catherine Fahl, Kirsten Metfies, Katja Salter, Ian Bauerfeind, Eduard Philos Trans A Math Phys Eng Sci Articles Two mooring arrays carrying sediment traps were deployed from September 2011 to August 2012 at ∼83°N on each side of the Gakkel Ridge in the Nansen and Amundsen Basins to measure downward particle flux below the euphotic zone (approx. 250 m) and approximately 150 m above seafloor at approximately 3500 and 4000 m depth, respectively. In a region that still experiences nearly complete ice cover throughout the year, export fluxes of total particulate matter (TPM), particulate organic carbon (POC), particulate nitrogen (PN), biogenic matter, lithogenic matter, biogenic particulate silica (bPSi), calcium carbonate (CaCO(3)), protists and biomarkers only slightly decreased with depth. Seasonal variations of particulate matter fluxes were similar on both sides of the Gakkel Ridge. Somewhat higher export rates in the Amundsen Basin and differences in the composition of the sinking TPM and bPSi on each side of the Gakkel Ridge probably reflected the influence of the Lena River/Transpolar Drift in the Amundsen Basin and the influence of Atlantic water in the Nansen Basin. Low variations in particle export with depth revealed a limited influence of lateral advection in the deep barren Eurasian Basin. This article is part of the theme issue ‘The changing Arctic Ocean: consequences for biological communities, biogeochemical processes and ecosystem functioning’. The Royal Society Publishing 2020-10-02 2020-08-31 /pmc/articles/PMC7481669/ /pubmed/32862819 http://dx.doi.org/10.1098/rsta.2019.0368 Text en © 2020 The Authors. http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/http://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
spellingShingle Articles
Nöthig, Eva-Maria
Lalande, Catherine
Fahl, Kirsten
Metfies, Katja
Salter, Ian
Bauerfeind, Eduard
Annual cycle of downward particle fluxes on each side of the Gakkel Ridge in the central Arctic Ocean
title Annual cycle of downward particle fluxes on each side of the Gakkel Ridge in the central Arctic Ocean
title_full Annual cycle of downward particle fluxes on each side of the Gakkel Ridge in the central Arctic Ocean
title_fullStr Annual cycle of downward particle fluxes on each side of the Gakkel Ridge in the central Arctic Ocean
title_full_unstemmed Annual cycle of downward particle fluxes on each side of the Gakkel Ridge in the central Arctic Ocean
title_short Annual cycle of downward particle fluxes on each side of the Gakkel Ridge in the central Arctic Ocean
title_sort annual cycle of downward particle fluxes on each side of the gakkel ridge in the central arctic ocean
topic Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7481669/
https://www.ncbi.nlm.nih.gov/pubmed/32862819
http://dx.doi.org/10.1098/rsta.2019.0368
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