An expanded database of Southern Hemisphere surface sediment dinoflagellate cyst assemblages and their oceanographic affinities
International audience Dinoflagellate cyst assemblages present a valuable proxy to infer paleoceanographic conditions, yet factors influencing geographic distributions of species remain largely unknown, especially in the Southern Ocean. Strong lateral transport, sea-ice dynamics, and a sparse and un...
Published in: | Journal of Micropalaeontology |
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Main Authors: | , , , , , , , , , |
Other Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2023
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Subjects: | |
Online Access: | https://hal.science/hal-04132310 https://hal.science/hal-04132310/document https://hal.science/hal-04132310/file/jm-42-35-2023.pdf https://doi.org/10.5194/jm-42-35-2023 |
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ftinsu:oai:HAL:hal-04132310v1 |
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Institut national des sciences de l'Univers: HAL-INSU |
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English |
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[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Thöle, Lena, Mareike Nooteboom, Peter, Dirk Hou, Suning Wang, Rujian Nie, Senyan Michel, Elisabeth Sauermilch, Isabel Marret, Fabienne Sangiorgi, Francesca Bijl, Peter, Kristian An expanded database of Southern Hemisphere surface sediment dinoflagellate cyst assemblages and their oceanographic affinities |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience Dinoflagellate cyst assemblages present a valuable proxy to infer paleoceanographic conditions, yet factors influencing geographic distributions of species remain largely unknown, especially in the Southern Ocean. Strong lateral transport, sea-ice dynamics, and a sparse and uneven geographic distribution of surface sediment samples have limited the use of dinocyst assemblages as a quantitative proxy for paleo-environmental conditions such as sea surface temperature (SST), nutrient concentrations, salinity, and sea ice (presence). In this study we present a new set of surface sediment samples (n = 66) from around Antarctica, doubling the number of Antarctic-proximal samples to 100 (dataset wsi_100) and increasing the total number of Southern Hemisphere samples to 655 (dataset sh_655). Additionally, we use modelled ocean conditions and apply Lagrangian techniques to all Southern Hemisphere sample stations to quantify and evaluate the influence of lateral transport on the sinking trajectory of microplankton and, with that, to the inferred ocean conditions. k-means cluster analysis on the wsi_100 dataset demonstrates the strong affinity of Selenopemphix antarctica with sea-ice presence and of Islandinium spp. with low-salinity conditions. For the entire Southern Hemisphere, the k-means cluster analysis identifies nine clusters with a characteristic assemblage. In most clusters a single dinocyst species dominates the assemblage. These clusters correspond to well-defined oceanic conditions in specific Southern Ocean zones or along the ocean fronts. We find that, when lateral transport is predominantly zonal, the environmental parameters inferred from the sea floor assemblages mostly correspond to those of the overlying ocean surface. In this case, the transport factor can thus be neglected and will not represent a bias in the reconstructions. Yet, for some individual sites, e.g. deep-water sites or sites under strong-current regimes, lateral transport can play a large role. The results of our ... |
author2 |
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) Paléocéanographie (PALEOCEAN) 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)) |
format |
Article in Journal/Newspaper |
author |
Thöle, Lena, Mareike Nooteboom, Peter, Dirk Hou, Suning Wang, Rujian Nie, Senyan Michel, Elisabeth Sauermilch, Isabel Marret, Fabienne Sangiorgi, Francesca Bijl, Peter, Kristian |
author_facet |
Thöle, Lena, Mareike Nooteboom, Peter, Dirk Hou, Suning Wang, Rujian Nie, Senyan Michel, Elisabeth Sauermilch, Isabel Marret, Fabienne Sangiorgi, Francesca Bijl, Peter, Kristian |
author_sort |
Thöle, Lena, Mareike |
title |
An expanded database of Southern Hemisphere surface sediment dinoflagellate cyst assemblages and their oceanographic affinities |
title_short |
An expanded database of Southern Hemisphere surface sediment dinoflagellate cyst assemblages and their oceanographic affinities |
title_full |
An expanded database of Southern Hemisphere surface sediment dinoflagellate cyst assemblages and their oceanographic affinities |
title_fullStr |
An expanded database of Southern Hemisphere surface sediment dinoflagellate cyst assemblages and their oceanographic affinities |
title_full_unstemmed |
An expanded database of Southern Hemisphere surface sediment dinoflagellate cyst assemblages and their oceanographic affinities |
title_sort |
expanded database of southern hemisphere surface sediment dinoflagellate cyst assemblages and their oceanographic affinities |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://hal.science/hal-04132310 https://hal.science/hal-04132310/document https://hal.science/hal-04132310/file/jm-42-35-2023.pdf https://doi.org/10.5194/jm-42-35-2023 |
genre |
Antarc* Antarctic Antarctica Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Sea ice Southern Ocean |
op_source |
ISSN: 0262-821X Journal of Micropalaeontology https://hal.science/hal-04132310 Journal of Micropalaeontology, 2023, 42 (1), pp.35 - 56. ⟨10.5194/jm-42-35-2023⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/jm-42-35-2023 hal-04132310 https://hal.science/hal-04132310 https://hal.science/hal-04132310/document https://hal.science/hal-04132310/file/jm-42-35-2023.pdf doi:10.5194/jm-42-35-2023 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/jm-42-35-2023 |
container_title |
Journal of Micropalaeontology |
container_volume |
42 |
container_issue |
1 |
container_start_page |
35 |
op_container_end_page |
56 |
_version_ |
1797571596041322496 |
spelling |
ftinsu:oai:HAL:hal-04132310v1 2024-04-28T07:58:46+00:00 An expanded database of Southern Hemisphere surface sediment dinoflagellate cyst assemblages and their oceanographic affinities Thöle, Lena, Mareike Nooteboom, Peter, Dirk Hou, Suning Wang, Rujian Nie, Senyan Michel, Elisabeth Sauermilch, Isabel Marret, Fabienne Sangiorgi, Francesca Bijl, Peter, Kristian 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) Paléocéanographie (PALEOCEAN) 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)) 2023-06-02 https://hal.science/hal-04132310 https://hal.science/hal-04132310/document https://hal.science/hal-04132310/file/jm-42-35-2023.pdf https://doi.org/10.5194/jm-42-35-2023 en eng HAL CCSD Geological Society info:eu-repo/semantics/altIdentifier/doi/10.5194/jm-42-35-2023 hal-04132310 https://hal.science/hal-04132310 https://hal.science/hal-04132310/document https://hal.science/hal-04132310/file/jm-42-35-2023.pdf doi:10.5194/jm-42-35-2023 info:eu-repo/semantics/OpenAccess ISSN: 0262-821X Journal of Micropalaeontology https://hal.science/hal-04132310 Journal of Micropalaeontology, 2023, 42 (1), pp.35 - 56. ⟨10.5194/jm-42-35-2023⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2023 ftinsu https://doi.org/10.5194/jm-42-35-2023 2024-04-05T00:29:02Z International audience Dinoflagellate cyst assemblages present a valuable proxy to infer paleoceanographic conditions, yet factors influencing geographic distributions of species remain largely unknown, especially in the Southern Ocean. Strong lateral transport, sea-ice dynamics, and a sparse and uneven geographic distribution of surface sediment samples have limited the use of dinocyst assemblages as a quantitative proxy for paleo-environmental conditions such as sea surface temperature (SST), nutrient concentrations, salinity, and sea ice (presence). In this study we present a new set of surface sediment samples (n = 66) from around Antarctica, doubling the number of Antarctic-proximal samples to 100 (dataset wsi_100) and increasing the total number of Southern Hemisphere samples to 655 (dataset sh_655). Additionally, we use modelled ocean conditions and apply Lagrangian techniques to all Southern Hemisphere sample stations to quantify and evaluate the influence of lateral transport on the sinking trajectory of microplankton and, with that, to the inferred ocean conditions. k-means cluster analysis on the wsi_100 dataset demonstrates the strong affinity of Selenopemphix antarctica with sea-ice presence and of Islandinium spp. with low-salinity conditions. For the entire Southern Hemisphere, the k-means cluster analysis identifies nine clusters with a characteristic assemblage. In most clusters a single dinocyst species dominates the assemblage. These clusters correspond to well-defined oceanic conditions in specific Southern Ocean zones or along the ocean fronts. We find that, when lateral transport is predominantly zonal, the environmental parameters inferred from the sea floor assemblages mostly correspond to those of the overlying ocean surface. In this case, the transport factor can thus be neglected and will not represent a bias in the reconstructions. Yet, for some individual sites, e.g. deep-water sites or sites under strong-current regimes, lateral transport can play a large role. The results of our ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Sea ice Southern Ocean Institut national des sciences de l'Univers: HAL-INSU Journal of Micropalaeontology 42 1 35 56 |