Planktonic foraminifera assemblages from the Brazil–Malvinas Confluence: palaeoceanographic implications of sub-surface temperature reconstructions in the western South Atlantic
Planktonic foraminifera census data have been widely used to reconstruct changes in ocean ecosystems as well as ocean chemistry and circulation through calibration functions. Here we analyse new core-top census data from 22 sites in the western South Atlantic, improving the geographical coverage and...
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ftconicet:oai:ri.conicet.gov.ar:11336/135838 2023-10-09T21:55:22+02:00 Planktonic foraminifera assemblages from the Brazil–Malvinas Confluence: palaeoceanographic implications of sub-surface temperature reconstructions in the western South Atlantic García Chapori, Natalia Luz Laprida, Cecilia application/pdf http://hdl.handle.net/11336/135838 eng eng Wiley Blackwell Publishing, Inc info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/10.1111/let.12416 info:eu-repo/semantics/altIdentifier/doi/10.1111/let.12416 http://hdl.handle.net/11336/135838 García Chapori, Natalia Luz; Laprida, Cecilia; Planktonic foraminifera assemblages from the Brazil–Malvinas Confluence: palaeoceanographic implications of sub-surface temperature reconstructions in the western South Atlantic; Wiley Blackwell Publishing, Inc; Lethaia; 2-2021; 1-18 0024-1164 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ BRAZIL-MALVINAS CONFLUENCE LATE QUATERNARY MULTIVARIATE CALIBRATION FUNCTION PALAEOCEANOGRAPHY PLANKTONIC FORAMINIFERA SUB-SURFACE TEMPERATURE WESTERN SOUTH ATLANTIC https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1111/let.12416 2023-09-24T18:50:24Z Planktonic foraminifera census data have been widely used to reconstruct changes in ocean ecosystems as well as ocean chemistry and circulation through calibration functions. Here we analyse new core-top census data from 22 sites in the western South Atlantic, improving the geographical coverage and spatial resolution of the environmental gradients from the region covered by the Brazil–Malvinas Confluence (~38°S–53°W). We combine them with previous data to provide an up-to-date compilation of the western South Atlantic planktonic foraminifera–calibration data set. We study the relationship between the assemblages present in the core-top samples and the most dynamic environmental variables from the region to establish the environmental variable(s) more resolved by the assemblages. Therefore, we develop and assess a new calibration function using the data set and testing several statistical models at different water depths. Our results reveal that the distribution and abundance of the species in the Brazil–Malvinas Confluence region mainly reflect the influence of two environmental variables: the mixed layer temperature and mixed layer depth (57% of total variance). The most precise reconstructions were obtained when using sub-surface temperatures between 40 and 50 m water depth. The application of the calibration function to a Holocene sediment core at ~37°S–53°W revealed mean annual sub-surface temperature reconstructions between 8°C and 11°C, confirming the northward displacement of the Brazil–Malvinas Confluence during the onset of the Holocene and suggesting a major influence of the Malvinas Current during the entire Holocene at the studied site. Fil: García Chapori, Natalia Luz. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina Fil: Laprida, Cecilia. ... Article in Journal/Newspaper Planktonic foraminifera CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Argentina Laprida ENVELOPE(-63.067,-63.067,-64.900,-64.900) Pablo ENVELOPE(-63.717,-63.717,-64.283,-64.283) Lethaia |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
BRAZIL-MALVINAS CONFLUENCE LATE QUATERNARY MULTIVARIATE CALIBRATION FUNCTION PALAEOCEANOGRAPHY PLANKTONIC FORAMINIFERA SUB-SURFACE TEMPERATURE WESTERN SOUTH ATLANTIC https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
BRAZIL-MALVINAS CONFLUENCE LATE QUATERNARY MULTIVARIATE CALIBRATION FUNCTION PALAEOCEANOGRAPHY PLANKTONIC FORAMINIFERA SUB-SURFACE TEMPERATURE WESTERN SOUTH ATLANTIC https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 García Chapori, Natalia Luz Laprida, Cecilia Planktonic foraminifera assemblages from the Brazil–Malvinas Confluence: palaeoceanographic implications of sub-surface temperature reconstructions in the western South Atlantic |
topic_facet |
BRAZIL-MALVINAS CONFLUENCE LATE QUATERNARY MULTIVARIATE CALIBRATION FUNCTION PALAEOCEANOGRAPHY PLANKTONIC FORAMINIFERA SUB-SURFACE TEMPERATURE WESTERN SOUTH ATLANTIC https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
Planktonic foraminifera census data have been widely used to reconstruct changes in ocean ecosystems as well as ocean chemistry and circulation through calibration functions. Here we analyse new core-top census data from 22 sites in the western South Atlantic, improving the geographical coverage and spatial resolution of the environmental gradients from the region covered by the Brazil–Malvinas Confluence (~38°S–53°W). We combine them with previous data to provide an up-to-date compilation of the western South Atlantic planktonic foraminifera–calibration data set. We study the relationship between the assemblages present in the core-top samples and the most dynamic environmental variables from the region to establish the environmental variable(s) more resolved by the assemblages. Therefore, we develop and assess a new calibration function using the data set and testing several statistical models at different water depths. Our results reveal that the distribution and abundance of the species in the Brazil–Malvinas Confluence region mainly reflect the influence of two environmental variables: the mixed layer temperature and mixed layer depth (57% of total variance). The most precise reconstructions were obtained when using sub-surface temperatures between 40 and 50 m water depth. The application of the calibration function to a Holocene sediment core at ~37°S–53°W revealed mean annual sub-surface temperature reconstructions between 8°C and 11°C, confirming the northward displacement of the Brazil–Malvinas Confluence during the onset of the Holocene and suggesting a major influence of the Malvinas Current during the entire Holocene at the studied site. Fil: García Chapori, Natalia Luz. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina Fil: Laprida, Cecilia. ... |
format |
Article in Journal/Newspaper |
author |
García Chapori, Natalia Luz Laprida, Cecilia |
author_facet |
García Chapori, Natalia Luz Laprida, Cecilia |
author_sort |
García Chapori, Natalia Luz |
title |
Planktonic foraminifera assemblages from the Brazil–Malvinas Confluence: palaeoceanographic implications of sub-surface temperature reconstructions in the western South Atlantic |
title_short |
Planktonic foraminifera assemblages from the Brazil–Malvinas Confluence: palaeoceanographic implications of sub-surface temperature reconstructions in the western South Atlantic |
title_full |
Planktonic foraminifera assemblages from the Brazil–Malvinas Confluence: palaeoceanographic implications of sub-surface temperature reconstructions in the western South Atlantic |
title_fullStr |
Planktonic foraminifera assemblages from the Brazil–Malvinas Confluence: palaeoceanographic implications of sub-surface temperature reconstructions in the western South Atlantic |
title_full_unstemmed |
Planktonic foraminifera assemblages from the Brazil–Malvinas Confluence: palaeoceanographic implications of sub-surface temperature reconstructions in the western South Atlantic |
title_sort |
planktonic foraminifera assemblages from the brazil–malvinas confluence: palaeoceanographic implications of sub-surface temperature reconstructions in the western south atlantic |
publisher |
Wiley Blackwell Publishing, Inc |
url |
http://hdl.handle.net/11336/135838 |
long_lat |
ENVELOPE(-63.067,-63.067,-64.900,-64.900) ENVELOPE(-63.717,-63.717,-64.283,-64.283) |
geographic |
Argentina Laprida Pablo |
geographic_facet |
Argentina Laprida Pablo |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/10.1111/let.12416 info:eu-repo/semantics/altIdentifier/doi/10.1111/let.12416 http://hdl.handle.net/11336/135838 García Chapori, Natalia Luz; Laprida, Cecilia; Planktonic foraminifera assemblages from the Brazil–Malvinas Confluence: palaeoceanographic implications of sub-surface temperature reconstructions in the western South Atlantic; Wiley Blackwell Publishing, Inc; Lethaia; 2-2021; 1-18 0024-1164 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1111/let.12416 |
container_title |
Lethaia |
_version_ |
1779319257124831232 |