Stable isotope ratios of foraminifera from sediment cores off northeastern Brazil, supplement to: Arz, Helge Wolfgang; Pätzold, Jürgen; Wefer, Gerold (1999): The deglacial history of the western tropical Atlantic as inferred from high resolution stable isotope records off northeastern Brazil. Earth and Planetary Science Letters, 167(1-2), 105-117
The western South Atlantic boundary currents represent a sensitive system within the global thermohaline circulation (THC). We investigated the impact of deglacial THC changes on the western tropical Atlantic studied in six high resolution sediment cores from the upper continental slope of Brazil. T...
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ftdatacite:10.1594/pangaea.711760 2023-05-15T17:34:45+02:00 Stable isotope ratios of foraminifera from sediment cores off northeastern Brazil, supplement to: Arz, Helge Wolfgang; Pätzold, Jürgen; Wefer, Gerold (1999): The deglacial history of the western tropical Atlantic as inferred from high resolution stable isotope records off northeastern Brazil. Earth and Planetary Science Letters, 167(1-2), 105-117 Arz, Helge Wolfgang Pätzold, Jürgen Wefer, Gerold 1999 application/zip https://dx.doi.org/10.1594/pangaea.711760 https://doi.pangaea.de/10.1594/PANGAEA.711760 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1016/s0012-821x(99)00025-4 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Gravity corer Kiel type JOPSII-6 JOPSII-8 Victor Hensen South Atlantic in Late Quaternary Reconstruction of Budget and Currents SFB261 Collection article Supplementary Collection of Datasets 1999 ftdatacite https://doi.org/10.1594/pangaea.711760 https://doi.org/10.1016/s0012-821x(99)00025-4 2021-11-05T12:55:41Z The western South Atlantic boundary currents represent a sensitive system within the global thermohaline circulation (THC). We investigated the impact of deglacial THC changes on the western tropical Atlantic studied in six high resolution sediment cores from the upper continental slope of Brazil. The stratigraphy of the cores is mainly based on 14C AMS dating of monospecific foraminiferal samples. Changes in the upper layer tropical ocean during the deglaciation are inferred from stable oxygen isotope measurements on planktic and benthic foraminifera. Variations in the delta18O residuals are assumed to be mainly temperature related. During the Oldest and Younger Dryas cooling periods, two major deglacial THC disturbances are reported from North Atlantic sediment cores. Concomitant to the repeated THC slowdown, we observe an upper layer warming in the tropical ocean. A reduced northward heat export from the tropical areas during these periods (weak North Brazil Current) is additionally reflected by low meridional gradients in the stable oxygen records. This generally agrees with results from coupled ocean atmosphere models. : Further isotope data and age models see Arz et al. (1998) datasets: doi:10.1594/PANGAEA.711735 and Arz et al. (1999) datasets: doi:10.1594/PANGAEA.711752 Article in Journal/Newspaper North Atlantic DataCite Metadata Store (German National Library of Science and Technology) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Gravity corer Kiel type JOPSII-6 JOPSII-8 Victor Hensen South Atlantic in Late Quaternary Reconstruction of Budget and Currents SFB261 |
spellingShingle |
Gravity corer Kiel type JOPSII-6 JOPSII-8 Victor Hensen South Atlantic in Late Quaternary Reconstruction of Budget and Currents SFB261 Arz, Helge Wolfgang Pätzold, Jürgen Wefer, Gerold Stable isotope ratios of foraminifera from sediment cores off northeastern Brazil, supplement to: Arz, Helge Wolfgang; Pätzold, Jürgen; Wefer, Gerold (1999): The deglacial history of the western tropical Atlantic as inferred from high resolution stable isotope records off northeastern Brazil. Earth and Planetary Science Letters, 167(1-2), 105-117 |
topic_facet |
Gravity corer Kiel type JOPSII-6 JOPSII-8 Victor Hensen South Atlantic in Late Quaternary Reconstruction of Budget and Currents SFB261 |
description |
The western South Atlantic boundary currents represent a sensitive system within the global thermohaline circulation (THC). We investigated the impact of deglacial THC changes on the western tropical Atlantic studied in six high resolution sediment cores from the upper continental slope of Brazil. The stratigraphy of the cores is mainly based on 14C AMS dating of monospecific foraminiferal samples. Changes in the upper layer tropical ocean during the deglaciation are inferred from stable oxygen isotope measurements on planktic and benthic foraminifera. Variations in the delta18O residuals are assumed to be mainly temperature related. During the Oldest and Younger Dryas cooling periods, two major deglacial THC disturbances are reported from North Atlantic sediment cores. Concomitant to the repeated THC slowdown, we observe an upper layer warming in the tropical ocean. A reduced northward heat export from the tropical areas during these periods (weak North Brazil Current) is additionally reflected by low meridional gradients in the stable oxygen records. This generally agrees with results from coupled ocean atmosphere models. : Further isotope data and age models see Arz et al. (1998) datasets: doi:10.1594/PANGAEA.711735 and Arz et al. (1999) datasets: doi:10.1594/PANGAEA.711752 |
format |
Article in Journal/Newspaper |
author |
Arz, Helge Wolfgang Pätzold, Jürgen Wefer, Gerold |
author_facet |
Arz, Helge Wolfgang Pätzold, Jürgen Wefer, Gerold |
author_sort |
Arz, Helge Wolfgang |
title |
Stable isotope ratios of foraminifera from sediment cores off northeastern Brazil, supplement to: Arz, Helge Wolfgang; Pätzold, Jürgen; Wefer, Gerold (1999): The deglacial history of the western tropical Atlantic as inferred from high resolution stable isotope records off northeastern Brazil. Earth and Planetary Science Letters, 167(1-2), 105-117 |
title_short |
Stable isotope ratios of foraminifera from sediment cores off northeastern Brazil, supplement to: Arz, Helge Wolfgang; Pätzold, Jürgen; Wefer, Gerold (1999): The deglacial history of the western tropical Atlantic as inferred from high resolution stable isotope records off northeastern Brazil. Earth and Planetary Science Letters, 167(1-2), 105-117 |
title_full |
Stable isotope ratios of foraminifera from sediment cores off northeastern Brazil, supplement to: Arz, Helge Wolfgang; Pätzold, Jürgen; Wefer, Gerold (1999): The deglacial history of the western tropical Atlantic as inferred from high resolution stable isotope records off northeastern Brazil. Earth and Planetary Science Letters, 167(1-2), 105-117 |
title_fullStr |
Stable isotope ratios of foraminifera from sediment cores off northeastern Brazil, supplement to: Arz, Helge Wolfgang; Pätzold, Jürgen; Wefer, Gerold (1999): The deglacial history of the western tropical Atlantic as inferred from high resolution stable isotope records off northeastern Brazil. Earth and Planetary Science Letters, 167(1-2), 105-117 |
title_full_unstemmed |
Stable isotope ratios of foraminifera from sediment cores off northeastern Brazil, supplement to: Arz, Helge Wolfgang; Pätzold, Jürgen; Wefer, Gerold (1999): The deglacial history of the western tropical Atlantic as inferred from high resolution stable isotope records off northeastern Brazil. Earth and Planetary Science Letters, 167(1-2), 105-117 |
title_sort |
stable isotope ratios of foraminifera from sediment cores off northeastern brazil, supplement to: arz, helge wolfgang; pätzold, jürgen; wefer, gerold (1999): the deglacial history of the western tropical atlantic as inferred from high resolution stable isotope records off northeastern brazil. earth and planetary science letters, 167(1-2), 105-117 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
1999 |
url |
https://dx.doi.org/10.1594/pangaea.711760 https://doi.pangaea.de/10.1594/PANGAEA.711760 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://dx.doi.org/10.1016/s0012-821x(99)00025-4 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.711760 https://doi.org/10.1016/s0012-821x(99)00025-4 |
_version_ |
1766133675367333888 |