Seasonality of the Physical and Biogeochemical Hydrography in the Inflow to the Arctic Ocean Through Fram Strait
Eastern Fram Strait and the shelf slope region north of Svalbard is dominated by the advection of warm, salty and nutrient-rich Atlantic Water (AW). This oceanic heat contributes to keeping the area relatively free of ice. The last years have seen a dramatic decrease in regional sea ice extent, whic...
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ftdoajarticles:oai:doaj.org/article:f574953d2fd34e28934ef9535d658fa1 2023-05-15T14:58:43+02:00 Seasonality of the Physical and Biogeochemical Hydrography in the Inflow to the Arctic Ocean Through Fram Strait Achim Randelhoff Marit Reigstad Melissa Chierici Arild Sundfjord Vladimir Ivanov Mattias Cape Maria Vernet Jean-Éric Tremblay Gunnar Bratbak Svein Kristiansen 2018-06-01T00:00:00Z https://doi.org/10.3389/fmars.2018.00224 https://doaj.org/article/f574953d2fd34e28934ef9535d658fa1 EN eng Frontiers Media S.A. https://www.frontiersin.org/article/10.3389/fmars.2018.00224/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2018.00224 https://doaj.org/article/f574953d2fd34e28934ef9535d658fa1 Frontiers in Marine Science, Vol 5 (2018) Arctic Ocean Atlantic water hydrography shelf slope nutrients carbon Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2018 ftdoajarticles https://doi.org/10.3389/fmars.2018.00224 2022-12-31T13:51:00Z Eastern Fram Strait and the shelf slope region north of Svalbard is dominated by the advection of warm, salty and nutrient-rich Atlantic Water (AW). This oceanic heat contributes to keeping the area relatively free of ice. The last years have seen a dramatic decrease in regional sea ice extent, which is expected to drive large increases in pelagic primary production and thereby changes in marine ecology and nutrient cycling. In a concerted effort, we conducted five cruises to the area in winter, spring, summer and fall of 2014, in order to understand the physical and biogeochemical controls of carbon cycling, for the first time from a year-round point of view. We document (1) the offshore location of the wintertime front between salty AW and fresher Surface Water in the ocean surface, (2) thermal convection of Atlantic Water over the shelf slope, likely enhancing vertical nutrient fluxes, and (3) the importance of ice melt derived upper ocean stratification for the spring bloom timing. Our findings strongly confirm the hypothesis that this “Atlantification,” as it has been called, of the shelf slope area north of Svalbard resulting from the advection of AW alleviates both nutrient and light limitations at the same time, leading to increased pelagic primary productivity in this region. Article in Journal/Newspaper Arctic Arctic Ocean Fram Strait Sea ice Svalbard Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean Round Point ENVELOPE(-58.317,-58.317,-61.900,-61.900) Svalbard Frontiers in Marine Science 5 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic Ocean Atlantic water hydrography shelf slope nutrients carbon Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
Arctic Ocean Atlantic water hydrography shelf slope nutrients carbon Science Q General. Including nature conservation geographical distribution QH1-199.5 Achim Randelhoff Marit Reigstad Melissa Chierici Arild Sundfjord Vladimir Ivanov Mattias Cape Maria Vernet Jean-Éric Tremblay Gunnar Bratbak Svein Kristiansen Seasonality of the Physical and Biogeochemical Hydrography in the Inflow to the Arctic Ocean Through Fram Strait |
topic_facet |
Arctic Ocean Atlantic water hydrography shelf slope nutrients carbon Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
Eastern Fram Strait and the shelf slope region north of Svalbard is dominated by the advection of warm, salty and nutrient-rich Atlantic Water (AW). This oceanic heat contributes to keeping the area relatively free of ice. The last years have seen a dramatic decrease in regional sea ice extent, which is expected to drive large increases in pelagic primary production and thereby changes in marine ecology and nutrient cycling. In a concerted effort, we conducted five cruises to the area in winter, spring, summer and fall of 2014, in order to understand the physical and biogeochemical controls of carbon cycling, for the first time from a year-round point of view. We document (1) the offshore location of the wintertime front between salty AW and fresher Surface Water in the ocean surface, (2) thermal convection of Atlantic Water over the shelf slope, likely enhancing vertical nutrient fluxes, and (3) the importance of ice melt derived upper ocean stratification for the spring bloom timing. Our findings strongly confirm the hypothesis that this “Atlantification,” as it has been called, of the shelf slope area north of Svalbard resulting from the advection of AW alleviates both nutrient and light limitations at the same time, leading to increased pelagic primary productivity in this region. |
format |
Article in Journal/Newspaper |
author |
Achim Randelhoff Marit Reigstad Melissa Chierici Arild Sundfjord Vladimir Ivanov Mattias Cape Maria Vernet Jean-Éric Tremblay Gunnar Bratbak Svein Kristiansen |
author_facet |
Achim Randelhoff Marit Reigstad Melissa Chierici Arild Sundfjord Vladimir Ivanov Mattias Cape Maria Vernet Jean-Éric Tremblay Gunnar Bratbak Svein Kristiansen |
author_sort |
Achim Randelhoff |
title |
Seasonality of the Physical and Biogeochemical Hydrography in the Inflow to the Arctic Ocean Through Fram Strait |
title_short |
Seasonality of the Physical and Biogeochemical Hydrography in the Inflow to the Arctic Ocean Through Fram Strait |
title_full |
Seasonality of the Physical and Biogeochemical Hydrography in the Inflow to the Arctic Ocean Through Fram Strait |
title_fullStr |
Seasonality of the Physical and Biogeochemical Hydrography in the Inflow to the Arctic Ocean Through Fram Strait |
title_full_unstemmed |
Seasonality of the Physical and Biogeochemical Hydrography in the Inflow to the Arctic Ocean Through Fram Strait |
title_sort |
seasonality of the physical and biogeochemical hydrography in the inflow to the arctic ocean through fram strait |
publisher |
Frontiers Media S.A. |
publishDate |
2018 |
url |
https://doi.org/10.3389/fmars.2018.00224 https://doaj.org/article/f574953d2fd34e28934ef9535d658fa1 |
long_lat |
ENVELOPE(-58.317,-58.317,-61.900,-61.900) |
geographic |
Arctic Arctic Ocean Round Point Svalbard |
geographic_facet |
Arctic Arctic Ocean Round Point Svalbard |
genre |
Arctic Arctic Ocean Fram Strait Sea ice Svalbard |
genre_facet |
Arctic Arctic Ocean Fram Strait Sea ice Svalbard |
op_source |
Frontiers in Marine Science, Vol 5 (2018) |
op_relation |
https://www.frontiersin.org/article/10.3389/fmars.2018.00224/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2018.00224 https://doaj.org/article/f574953d2fd34e28934ef9535d658fa1 |
op_doi |
https://doi.org/10.3389/fmars.2018.00224 |
container_title |
Frontiers in Marine Science |
container_volume |
5 |
_version_ |
1766330846261805056 |