Benthic stable isotope variability in the Trondheimsfjord during the last 50 years: Proxy records of mixing dynamics related to NAO
International audience Benthic stable isotopes (d 18 O c and d 13 C c) in the Trondheimsfjord reliably reflect the prevailing hydrological conditions with regard to the distance to the fjord entrance and the local topography. At the fjord entrance the d 18 O c and d 13 C c variabilities record chang...
Published in: | Estuarine, Coastal and Shelf Science |
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Format: | Article in Journal/Newspaper |
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Online Access: | https://hal.science/hal-02128892 https://doi.org/10.1016/j.ecss.2016.01.034 |
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ftecolephe:oai:HAL:hal-02128892v1 2024-05-19T07:44:25+00:00 Benthic stable isotope variability in the Trondheimsfjord during the last 50 years: Proxy records of mixing dynamics related to NAO Milzer, G. Giraudeau, J. Rühlemann, C. Faust, J. Knies, J. Schmidt, S. Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) Bundesanstalt für Geowissenschaften und Rohstoffe (BGR) The Arctic University of Norway Tromsø, Norway (UiT) 2016 https://hal.science/hal-02128892 https://doi.org/10.1016/j.ecss.2016.01.034 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ecss.2016.01.034 hal-02128892 https://hal.science/hal-02128892 doi:10.1016/j.ecss.2016.01.034 ISSN: 0272-7714 EISSN: 1096-0015 Estuarine, Coastal and Shelf Science https://hal.science/hal-02128892 Estuarine, Coastal and Shelf Science, 2016, 172, pp.34-46. ⟨10.1016/j.ecss.2016.01.034⟩ Trondheimsfjord Benthic foraminiferal stable isotopes Central Norway Fjord hydrology [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2016 ftecolephe https://doi.org/10.1016/j.ecss.2016.01.034 2024-04-25T01:48:18Z International audience Benthic stable isotopes (d 18 O c and d 13 C c) in the Trondheimsfjord reliably reflect the prevailing hydrological conditions with regard to the distance to the fjord entrance and the local topography. At the fjord entrance the d 18 O c and d 13 C c variabilities record changes in the temperature of the North Atlantic Current (NAC), and in the delivery of terrigenous organic matter by the Norwegian Coastal Current (NCC) and the fjord estuarine circulation, respectively. In the inner fjord basins, the benthic stable isotope compositions are predominantly controlled by hydrological characteristics linked to internal mixing and the prevailing wind pattern. The fjord deep basins are relatively sheltered from erosion and both land and marine-derived sediments accumulate at very high rates indicating past regional climate and associated driving parameters. In the present study we discuss the recent variability (last 55 years) of the stable isotope compositions (oxygen and carbon) measured in calcite shells of the benthic foraminiferan Mel-onis barleeanus with regard to the changing influence of marine versus fresh water inputs and of the prevailing wind patterns. The relative influence of marine versus continental waters were analysed as well as the complex topography and the related hydrology of the Trondheimsfjord using sediment cores collected in three different settings along the fjord axis. The variability the of stable isotope compositions obtained from the sedimentary archives is compared with in situ instrumental measurements over the investigated time interval. Article in Journal/Newspaper north atlantic current North Atlantic EPHE (Ecole pratique des hautes études, Paris): HAL Estuarine, Coastal and Shelf Science 172 34 46 |
institution |
Open Polar |
collection |
EPHE (Ecole pratique des hautes études, Paris): HAL |
op_collection_id |
ftecolephe |
language |
English |
topic |
Trondheimsfjord Benthic foraminiferal stable isotopes Central Norway Fjord hydrology [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
Trondheimsfjord Benthic foraminiferal stable isotopes Central Norway Fjord hydrology [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Milzer, G. Giraudeau, J. Rühlemann, C. Faust, J. Knies, J. Schmidt, S. Benthic stable isotope variability in the Trondheimsfjord during the last 50 years: Proxy records of mixing dynamics related to NAO |
topic_facet |
Trondheimsfjord Benthic foraminiferal stable isotopes Central Norway Fjord hydrology [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Benthic stable isotopes (d 18 O c and d 13 C c) in the Trondheimsfjord reliably reflect the prevailing hydrological conditions with regard to the distance to the fjord entrance and the local topography. At the fjord entrance the d 18 O c and d 13 C c variabilities record changes in the temperature of the North Atlantic Current (NAC), and in the delivery of terrigenous organic matter by the Norwegian Coastal Current (NCC) and the fjord estuarine circulation, respectively. In the inner fjord basins, the benthic stable isotope compositions are predominantly controlled by hydrological characteristics linked to internal mixing and the prevailing wind pattern. The fjord deep basins are relatively sheltered from erosion and both land and marine-derived sediments accumulate at very high rates indicating past regional climate and associated driving parameters. In the present study we discuss the recent variability (last 55 years) of the stable isotope compositions (oxygen and carbon) measured in calcite shells of the benthic foraminiferan Mel-onis barleeanus with regard to the changing influence of marine versus fresh water inputs and of the prevailing wind patterns. The relative influence of marine versus continental waters were analysed as well as the complex topography and the related hydrology of the Trondheimsfjord using sediment cores collected in three different settings along the fjord axis. The variability the of stable isotope compositions obtained from the sedimentary archives is compared with in situ instrumental measurements over the investigated time interval. |
author2 |
Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) Bundesanstalt für Geowissenschaften und Rohstoffe (BGR) The Arctic University of Norway Tromsø, Norway (UiT) |
format |
Article in Journal/Newspaper |
author |
Milzer, G. Giraudeau, J. Rühlemann, C. Faust, J. Knies, J. Schmidt, S. |
author_facet |
Milzer, G. Giraudeau, J. Rühlemann, C. Faust, J. Knies, J. Schmidt, S. |
author_sort |
Milzer, G. |
title |
Benthic stable isotope variability in the Trondheimsfjord during the last 50 years: Proxy records of mixing dynamics related to NAO |
title_short |
Benthic stable isotope variability in the Trondheimsfjord during the last 50 years: Proxy records of mixing dynamics related to NAO |
title_full |
Benthic stable isotope variability in the Trondheimsfjord during the last 50 years: Proxy records of mixing dynamics related to NAO |
title_fullStr |
Benthic stable isotope variability in the Trondheimsfjord during the last 50 years: Proxy records of mixing dynamics related to NAO |
title_full_unstemmed |
Benthic stable isotope variability in the Trondheimsfjord during the last 50 years: Proxy records of mixing dynamics related to NAO |
title_sort |
benthic stable isotope variability in the trondheimsfjord during the last 50 years: proxy records of mixing dynamics related to nao |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.science/hal-02128892 https://doi.org/10.1016/j.ecss.2016.01.034 |
genre |
north atlantic current North Atlantic |
genre_facet |
north atlantic current North Atlantic |
op_source |
ISSN: 0272-7714 EISSN: 1096-0015 Estuarine, Coastal and Shelf Science https://hal.science/hal-02128892 Estuarine, Coastal and Shelf Science, 2016, 172, pp.34-46. ⟨10.1016/j.ecss.2016.01.034⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ecss.2016.01.034 hal-02128892 https://hal.science/hal-02128892 doi:10.1016/j.ecss.2016.01.034 |
op_doi |
https://doi.org/10.1016/j.ecss.2016.01.034 |
container_title |
Estuarine, Coastal and Shelf Science |
container_volume |
172 |
container_start_page |
34 |
op_container_end_page |
46 |
_version_ |
1799484196975017984 |