Age model, sedimentation rates and stable carbon isotopic rates of sediment core GeoB6212-1, supplement to: Campos, Marília de Carvalho; Chiessi, Cristiano Mazur; Voigt, Ines; Piola, Alberto R; Kuhnert, Henning; Mulitza, Stefan (2017): d13C decreases in the upper western South Atlantic during Heinrich Stadials 3 and 2. Climate of the Past, 13, 345-358
Abrupt millennial-scale climate change events of the last deglaciation (i.e. Heinrich Stadial 1 and the Younger Dryas) were accompanied by marked increases in atmospheric CO2 (CO2atm) and decreases in its stable carbon isotopic ratios (d13C), i.e. d13CO2atm, presumably due to outgassing from the oce...
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ftdatacite:10.1594/pangaea.874350 2023-05-15T17:36:27+02:00 Age model, sedimentation rates and stable carbon isotopic rates of sediment core GeoB6212-1, supplement to: Campos, Marília de Carvalho; Chiessi, Cristiano Mazur; Voigt, Ines; Piola, Alberto R; Kuhnert, Henning; Mulitza, Stefan (2017): d13C decreases in the upper western South Atlantic during Heinrich Stadials 3 and 2. Climate of the Past, 13, 345-358 Campos, Marília de Carvalho Chiessi, Cristiano Mazur Voigt, Ines Piola, Alberto R Kuhnert, Henning Mulitza, Stefan 2017 application/zip https://dx.doi.org/10.1594/pangaea.874350 https://doi.pangaea.de/10.1594/PANGAEA.874350 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.5194/cp-13-345-2017 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Center for Marine Environmental Sciences MARUM Geosciences, University of Bremen GeoB article Supplementary Collection of Datasets Collection 2017 ftdatacite https://doi.org/10.1594/pangaea.874350 https://doi.org/10.5194/cp-13-345-2017 2022-02-09T12:04:35Z Abrupt millennial-scale climate change events of the last deglaciation (i.e. Heinrich Stadial 1 and the Younger Dryas) were accompanied by marked increases in atmospheric CO2 (CO2atm) and decreases in its stable carbon isotopic ratios (d13C), i.e. d13CO2atm, presumably due to outgassing from the ocean. However, information on the preceding Heinrich Stadials during the last glacial period is scarce. Here we present d13C records from two species of planktonic foraminifera from the western South Atlantic that reveal major decreases (up to 1 per mil) during Heinrich Stadials 3 and 2. These d13C decreases are most likely related to millennialscale periods of weakening of the Atlantic meridional overturning circulation and the consequent increase (decrease) in CO2atm (d13CO2atm). We hypothesise two mechanisms that could account for the decreases observed in our records, namely strengthening of Southern Ocean deep-water ventilation and weakening of the biological pump. Additionally, we suggest that air?sea gas exchange could have contributed to the observed d13C decreases. Together with other lines of evidence, our data are consistent with the hypothesis that the CO2 added to the atmosphere during abrupt millennial-scale climate change events of the last glacial period also originated in the ocean and reached the atmosphere by outgassing. The temporal evolution of d13C during Heinrich Stadials 3 and 2 in our records is characterized by two relative minima separated by a relative maximum. This ?w structure? is also found in North Atlantic and South American records, further suggesting that such a structure is a pervasive feature of Heinrich Stadial 2 and, possibly, also Heinrich Stadial 3. Article in Journal/Newspaper North Atlantic Planktonic foraminifera Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Southern Ocean |
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collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Center for Marine Environmental Sciences MARUM Geosciences, University of Bremen GeoB |
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Center for Marine Environmental Sciences MARUM Geosciences, University of Bremen GeoB Campos, Marília de Carvalho Chiessi, Cristiano Mazur Voigt, Ines Piola, Alberto R Kuhnert, Henning Mulitza, Stefan Age model, sedimentation rates and stable carbon isotopic rates of sediment core GeoB6212-1, supplement to: Campos, Marília de Carvalho; Chiessi, Cristiano Mazur; Voigt, Ines; Piola, Alberto R; Kuhnert, Henning; Mulitza, Stefan (2017): d13C decreases in the upper western South Atlantic during Heinrich Stadials 3 and 2. Climate of the Past, 13, 345-358 |
topic_facet |
Center for Marine Environmental Sciences MARUM Geosciences, University of Bremen GeoB |
description |
Abrupt millennial-scale climate change events of the last deglaciation (i.e. Heinrich Stadial 1 and the Younger Dryas) were accompanied by marked increases in atmospheric CO2 (CO2atm) and decreases in its stable carbon isotopic ratios (d13C), i.e. d13CO2atm, presumably due to outgassing from the ocean. However, information on the preceding Heinrich Stadials during the last glacial period is scarce. Here we present d13C records from two species of planktonic foraminifera from the western South Atlantic that reveal major decreases (up to 1 per mil) during Heinrich Stadials 3 and 2. These d13C decreases are most likely related to millennialscale periods of weakening of the Atlantic meridional overturning circulation and the consequent increase (decrease) in CO2atm (d13CO2atm). We hypothesise two mechanisms that could account for the decreases observed in our records, namely strengthening of Southern Ocean deep-water ventilation and weakening of the biological pump. Additionally, we suggest that air?sea gas exchange could have contributed to the observed d13C decreases. Together with other lines of evidence, our data are consistent with the hypothesis that the CO2 added to the atmosphere during abrupt millennial-scale climate change events of the last glacial period also originated in the ocean and reached the atmosphere by outgassing. The temporal evolution of d13C during Heinrich Stadials 3 and 2 in our records is characterized by two relative minima separated by a relative maximum. This ?w structure? is also found in North Atlantic and South American records, further suggesting that such a structure is a pervasive feature of Heinrich Stadial 2 and, possibly, also Heinrich Stadial 3. |
format |
Article in Journal/Newspaper |
author |
Campos, Marília de Carvalho Chiessi, Cristiano Mazur Voigt, Ines Piola, Alberto R Kuhnert, Henning Mulitza, Stefan |
author_facet |
Campos, Marília de Carvalho Chiessi, Cristiano Mazur Voigt, Ines Piola, Alberto R Kuhnert, Henning Mulitza, Stefan |
author_sort |
Campos, Marília de Carvalho |
title |
Age model, sedimentation rates and stable carbon isotopic rates of sediment core GeoB6212-1, supplement to: Campos, Marília de Carvalho; Chiessi, Cristiano Mazur; Voigt, Ines; Piola, Alberto R; Kuhnert, Henning; Mulitza, Stefan (2017): d13C decreases in the upper western South Atlantic during Heinrich Stadials 3 and 2. Climate of the Past, 13, 345-358 |
title_short |
Age model, sedimentation rates and stable carbon isotopic rates of sediment core GeoB6212-1, supplement to: Campos, Marília de Carvalho; Chiessi, Cristiano Mazur; Voigt, Ines; Piola, Alberto R; Kuhnert, Henning; Mulitza, Stefan (2017): d13C decreases in the upper western South Atlantic during Heinrich Stadials 3 and 2. Climate of the Past, 13, 345-358 |
title_full |
Age model, sedimentation rates and stable carbon isotopic rates of sediment core GeoB6212-1, supplement to: Campos, Marília de Carvalho; Chiessi, Cristiano Mazur; Voigt, Ines; Piola, Alberto R; Kuhnert, Henning; Mulitza, Stefan (2017): d13C decreases in the upper western South Atlantic during Heinrich Stadials 3 and 2. Climate of the Past, 13, 345-358 |
title_fullStr |
Age model, sedimentation rates and stable carbon isotopic rates of sediment core GeoB6212-1, supplement to: Campos, Marília de Carvalho; Chiessi, Cristiano Mazur; Voigt, Ines; Piola, Alberto R; Kuhnert, Henning; Mulitza, Stefan (2017): d13C decreases in the upper western South Atlantic during Heinrich Stadials 3 and 2. Climate of the Past, 13, 345-358 |
title_full_unstemmed |
Age model, sedimentation rates and stable carbon isotopic rates of sediment core GeoB6212-1, supplement to: Campos, Marília de Carvalho; Chiessi, Cristiano Mazur; Voigt, Ines; Piola, Alberto R; Kuhnert, Henning; Mulitza, Stefan (2017): d13C decreases in the upper western South Atlantic during Heinrich Stadials 3 and 2. Climate of the Past, 13, 345-358 |
title_sort |
age model, sedimentation rates and stable carbon isotopic rates of sediment core geob6212-1, supplement to: campos, marília de carvalho; chiessi, cristiano mazur; voigt, ines; piola, alberto r; kuhnert, henning; mulitza, stefan (2017): d13c decreases in the upper western south atlantic during heinrich stadials 3 and 2. climate of the past, 13, 345-358 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2017 |
url |
https://dx.doi.org/10.1594/pangaea.874350 https://doi.pangaea.de/10.1594/PANGAEA.874350 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
North Atlantic Planktonic foraminifera Southern Ocean |
genre_facet |
North Atlantic Planktonic foraminifera Southern Ocean |
op_relation |
https://dx.doi.org/10.5194/cp-13-345-2017 |
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.874350 https://doi.org/10.5194/cp-13-345-2017 |
_version_ |
1766135937650130944 |