Benthic foraminifera as tracers of brine production in the Storfjorden "sea ice factory"
International audience The rapid response of benthic foraminifera to environmental factors (e.g. organic matter quality and quantity, salinity, pH) and their high fossilisation potential make them promising bio-indicators for the intensity and recurrence of brine formation in Arctic seas. Such an ap...
Published in: | Biogeosciences |
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Main Authors: | , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2020
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Subjects: | |
Online Access: | https://hal.science/hal-02539484 https://hal.science/hal-02539484/document https://hal.science/hal-02539484/file/bg-17-1933-2020.pdf https://doi.org/10.5194/bg-17-1933-2020 |
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openpolar |
institution |
Open Polar |
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HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
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ftceafr |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry Fossile, Eleonora Nardelli, Maria Pia Jouini, Arbia Lansard, Bruno Pusceddu, Antonio Moccia, Davide Michel, Elisabeth Peron, Olivier Howa, Hélène Mojtahid, Meryem Benthic foraminifera as tracers of brine production in the Storfjorden "sea ice factory" |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
description |
International audience The rapid response of benthic foraminifera to environmental factors (e.g. organic matter quality and quantity, salinity, pH) and their high fossilisation potential make them promising bio-indicators for the intensity and recurrence of brine formation in Arctic seas. Such an approach, however, requires a thorough knowledge of their modern ecology in such extreme settings. To this aim, seven stations along a north–south transect across the Storfjorden (Svalbard archipelago) have been sampled using an interface multicorer. This fjord is an area of intense sea ice formation characterised by the production of brine-enriched shelf waters (BSW) as a result of a recurrent latent-heat polynya. Living (rose bengal-stained) foraminiferal assemblages were analysed together with geochemical and sedimentological parameters in the top 5 cm of the sediment. Three major biozones were distinguished. (i) The “inner fjord” zone, dominated by typical glacier proximal calcareous species, which opportunistically respond to fresh organic matter inputs. (ii) The “deep basins and sill” zone, characterised by glacier distal agglutinated fauna; these are either dominant because of the mostly refractory nature of organic matter and/or the brine persistence that hampers the growth of calcareous species and/or causes their dissolution. (iii) The “outer fjord” zone, characterised by typical North Atlantic species due to the intrusion of the North Atlantic water in the Storfjordrenna. The stressful conditions present in the deep basins and sill (i.e. acidic waters and low food quality) result in a high agglutinated ∕ calcareous ratio (A∕C). This supports the potential use of the A∕C ratio as a proxy for brine persistence and overflow in Storfjorden |
author2 |
Laboratoire de Planétologie et Géodynamique - Angers (LPG-ANGERS) Laboratoire de Planétologie et Géodynamique UMR 6112 (LPG) Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Océan et Interfaces (OCEANIS) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Department of Life and Environmental Sciences Università degli Studi di Cagliari = University of Cagliari (UniCa) Paléocéanographie (PALEOCEAN) Laboratoire de physique subatomique et des technologies associées (SUBATECH) Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) Université de Nantes (UN)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique) Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT) The research was funded by the ABBA (Observatoire des Sciences de l'Univers de Nantes Atlantique), Bi-SMART (University of Angers) and TANDEM (Région Pays de la Loire) projects |
format |
Article in Journal/Newspaper |
author |
Fossile, Eleonora Nardelli, Maria Pia Jouini, Arbia Lansard, Bruno Pusceddu, Antonio Moccia, Davide Michel, Elisabeth Peron, Olivier Howa, Hélène Mojtahid, Meryem |
author_facet |
Fossile, Eleonora Nardelli, Maria Pia Jouini, Arbia Lansard, Bruno Pusceddu, Antonio Moccia, Davide Michel, Elisabeth Peron, Olivier Howa, Hélène Mojtahid, Meryem |
author_sort |
Fossile, Eleonora |
title |
Benthic foraminifera as tracers of brine production in the Storfjorden "sea ice factory" |
title_short |
Benthic foraminifera as tracers of brine production in the Storfjorden "sea ice factory" |
title_full |
Benthic foraminifera as tracers of brine production in the Storfjorden "sea ice factory" |
title_fullStr |
Benthic foraminifera as tracers of brine production in the Storfjorden "sea ice factory" |
title_full_unstemmed |
Benthic foraminifera as tracers of brine production in the Storfjorden "sea ice factory" |
title_sort |
benthic foraminifera as tracers of brine production in the storfjorden "sea ice factory" |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-02539484 https://hal.science/hal-02539484/document https://hal.science/hal-02539484/file/bg-17-1933-2020.pdf https://doi.org/10.5194/bg-17-1933-2020 |
long_lat |
ENVELOPE(17.000,17.000,76.000,76.000) |
geographic |
Arctic Svalbard Svalbard Archipelago Storfjordrenna |
geographic_facet |
Arctic Svalbard Svalbard Archipelago Storfjordrenna |
genre |
Arctic Foraminifera* glacier North Atlantic Sea ice Storfjorden Storfjordrenna Svalbard |
genre_facet |
Arctic Foraminifera* glacier North Atlantic Sea ice Storfjorden Storfjordrenna Svalbard |
op_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.science/hal-02539484 Biogeosciences, 2020, 17 (7), pp.1933-1953. ⟨10.5194/bg-17-1933-2020⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-17-1933-2020 hal-02539484 https://hal.science/hal-02539484 https://hal.science/hal-02539484/document https://hal.science/hal-02539484/file/bg-17-1933-2020.pdf doi:10.5194/bg-17-1933-2020 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/bg-17-1933-2020 |
container_title |
Biogeosciences |
container_volume |
17 |
container_issue |
7 |
container_start_page |
1933 |
op_container_end_page |
1953 |
_version_ |
1801373142710484992 |
spelling |
ftceafr:oai:HAL:hal-02539484v1 2024-06-09T07:44:24+00:00 Benthic foraminifera as tracers of brine production in the Storfjorden "sea ice factory" Fossile, Eleonora Nardelli, Maria Pia Jouini, Arbia Lansard, Bruno Pusceddu, Antonio Moccia, Davide Michel, Elisabeth Peron, Olivier Howa, Hélène Mojtahid, Meryem Laboratoire de Planétologie et Géodynamique - Angers (LPG-ANGERS) Laboratoire de Planétologie et Géodynamique UMR 6112 (LPG) Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université d'Angers (UA)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) Université de Nantes (UN)-Université de Nantes (UN)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Océan et Interfaces (OCEANIS) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Department of Life and Environmental Sciences Università degli Studi di Cagliari = University of Cagliari (UniCa) Paléocéanographie (PALEOCEAN) Laboratoire de physique subatomique et des technologies associées (SUBATECH) Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST) Université de Nantes (UN)-Université de Nantes (UN)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-IMT Atlantique (IMT Atlantique) Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT) The research was funded by the ABBA (Observatoire des Sciences de l'Univers de Nantes Atlantique), Bi-SMART (University of Angers) and TANDEM (Région Pays de la Loire) projects 2020 https://hal.science/hal-02539484 https://hal.science/hal-02539484/document https://hal.science/hal-02539484/file/bg-17-1933-2020.pdf https://doi.org/10.5194/bg-17-1933-2020 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-17-1933-2020 hal-02539484 https://hal.science/hal-02539484 https://hal.science/hal-02539484/document https://hal.science/hal-02539484/file/bg-17-1933-2020.pdf doi:10.5194/bg-17-1933-2020 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.science/hal-02539484 Biogeosciences, 2020, 17 (7), pp.1933-1953. ⟨10.5194/bg-17-1933-2020⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry info:eu-repo/semantics/article Journal articles 2020 ftceafr https://doi.org/10.5194/bg-17-1933-2020 2024-05-16T14:58:22Z International audience The rapid response of benthic foraminifera to environmental factors (e.g. organic matter quality and quantity, salinity, pH) and their high fossilisation potential make them promising bio-indicators for the intensity and recurrence of brine formation in Arctic seas. Such an approach, however, requires a thorough knowledge of their modern ecology in such extreme settings. To this aim, seven stations along a north–south transect across the Storfjorden (Svalbard archipelago) have been sampled using an interface multicorer. This fjord is an area of intense sea ice formation characterised by the production of brine-enriched shelf waters (BSW) as a result of a recurrent latent-heat polynya. Living (rose bengal-stained) foraminiferal assemblages were analysed together with geochemical and sedimentological parameters in the top 5 cm of the sediment. Three major biozones were distinguished. (i) The “inner fjord” zone, dominated by typical glacier proximal calcareous species, which opportunistically respond to fresh organic matter inputs. (ii) The “deep basins and sill” zone, characterised by glacier distal agglutinated fauna; these are either dominant because of the mostly refractory nature of organic matter and/or the brine persistence that hampers the growth of calcareous species and/or causes their dissolution. (iii) The “outer fjord” zone, characterised by typical North Atlantic species due to the intrusion of the North Atlantic water in the Storfjordrenna. The stressful conditions present in the deep basins and sill (i.e. acidic waters and low food quality) result in a high agglutinated ∕ calcareous ratio (A∕C). This supports the potential use of the A∕C ratio as a proxy for brine persistence and overflow in Storfjorden Article in Journal/Newspaper Arctic Foraminifera* glacier North Atlantic Sea ice Storfjorden Storfjordrenna Svalbard HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Arctic Svalbard Svalbard Archipelago Storfjordrenna ENVELOPE(17.000,17.000,76.000,76.000) Biogeosciences 17 7 1933 1953 |