Chemical analysis with regard to global and local climatic forcing measured on sediment core GeoB3711-1, GeoB3711-3 and GeoB4917-8, supplement to: Badewien, Tanja; Vogts, Angela; Dupont, Lydie M; Rullkötter, Jürgen (2015): Influence of Late Pleistocene and Holocene climate on vegetation distributions in southwest Africa elucidated from sedimentary n-alkanes - Differences between 12°S and 20°S. Quaternary Science Reviews, 125, 160-171
Global and local climatic forcing, e.g. concentration of atmospheric CO2 or insolation, influence the distribution of C3 and C4 plants in southwest Africa. C4 plants dominate in more arid and warmer areas and are favoured by lower pCO2 levels. Several studies have assessed past and present continent...
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ftdatacite:10.1594/pangaea.831446 2023-05-15T13:33:00+02:00 Chemical analysis with regard to global and local climatic forcing measured on sediment core GeoB3711-1, GeoB3711-3 and GeoB4917-8, supplement to: Badewien, Tanja; Vogts, Angela; Dupont, Lydie M; Rullkötter, Jürgen (2015): Influence of Late Pleistocene and Holocene climate on vegetation distributions in southwest Africa elucidated from sedimentary n-alkanes - Differences between 12°S and 20°S. Quaternary Science Reviews, 125, 160-171 Badewien, Tanja Vogts, Angela Dupont, Lydie M Rullkötter, Jürgen 2015 application/zip https://dx.doi.org/10.1594/pangaea.831446 https://doi.pangaea.de/10.1594/PANGAEA.831446 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1016/j.quascirev.2015.08.004 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 Supplementary Collection of Datasets Collection article 2015 ftdatacite https://doi.org/10.1594/pangaea.831446 https://doi.org/10.1016/j.quascirev.2015.08.004 2022-02-08T16:24:46Z Global and local climatic forcing, e.g. concentration of atmospheric CO2 or insolation, influence the distribution of C3 and C4 plants in southwest Africa. C4 plants dominate in more arid and warmer areas and are favoured by lower pCO2 levels. Several studies have assessed past and present continental vegetation by the analysis of terrestrial n-alkanes in near-coastal deep sea sediments using single samples or a small number of samples from a given climatic stage. The objectives of this study were to evaluate vegetation changes in southwest Africa with regard to climatic changes during the Late Pleistocene and the Holocene and to elucidate the potential of single sample simplifications. We analysed two sediment cores at high resolution, altogether ca. 240 samples, from the Southeast Atlantic Ocean (20°S and 12°S) covering the time spans of 18 to 1 ka and 56 to 2 ka, respectively. Our results for 20°S showed marginally decreasing C4 plant domination (of ca. 5%) during deglaciation based on average chain length (ACL27-33 values) and carbon isotopic composition of the C31 and C33 n-alkanes. Values for single samples from 18 ka and the Holocene overlap and, thus, are not significantly representative of the climatic stages they derive from. In contrast, at 12°S the n-alkane parameters show a clear difference of plant type for the Late Pleistocene (C4 plant domination, 66% C4 on average) and the Holocene (C3 plant domination, 40% C4 on average). During deglaciation vegetation change highly correlates with the increase in pCO2 (r² = 0.91). Short-term climatic events such as Heinrich Stadials or Antarctic warming periods are not reflected by vegetation changes in the catchment area. Instead, smaller vegetation fluctuations during the Late Pleistocene occur in accordance with local variations of insolation. Article in Journal/Newspaper Antarc* Antarctic DataCite Metadata Store (German National Library of Science and Technology) Antarctic |
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DataCite Metadata Store (German National Library of Science and Technology) |
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English |
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Center for Marine Environmental Sciences MARUM |
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Center for Marine Environmental Sciences MARUM Badewien, Tanja Vogts, Angela Dupont, Lydie M Rullkötter, Jürgen Chemical analysis with regard to global and local climatic forcing measured on sediment core GeoB3711-1, GeoB3711-3 and GeoB4917-8, supplement to: Badewien, Tanja; Vogts, Angela; Dupont, Lydie M; Rullkötter, Jürgen (2015): Influence of Late Pleistocene and Holocene climate on vegetation distributions in southwest Africa elucidated from sedimentary n-alkanes - Differences between 12°S and 20°S. Quaternary Science Reviews, 125, 160-171 |
topic_facet |
Center for Marine Environmental Sciences MARUM |
description |
Global and local climatic forcing, e.g. concentration of atmospheric CO2 or insolation, influence the distribution of C3 and C4 plants in southwest Africa. C4 plants dominate in more arid and warmer areas and are favoured by lower pCO2 levels. Several studies have assessed past and present continental vegetation by the analysis of terrestrial n-alkanes in near-coastal deep sea sediments using single samples or a small number of samples from a given climatic stage. The objectives of this study were to evaluate vegetation changes in southwest Africa with regard to climatic changes during the Late Pleistocene and the Holocene and to elucidate the potential of single sample simplifications. We analysed two sediment cores at high resolution, altogether ca. 240 samples, from the Southeast Atlantic Ocean (20°S and 12°S) covering the time spans of 18 to 1 ka and 56 to 2 ka, respectively. Our results for 20°S showed marginally decreasing C4 plant domination (of ca. 5%) during deglaciation based on average chain length (ACL27-33 values) and carbon isotopic composition of the C31 and C33 n-alkanes. Values for single samples from 18 ka and the Holocene overlap and, thus, are not significantly representative of the climatic stages they derive from. In contrast, at 12°S the n-alkane parameters show a clear difference of plant type for the Late Pleistocene (C4 plant domination, 66% C4 on average) and the Holocene (C3 plant domination, 40% C4 on average). During deglaciation vegetation change highly correlates with the increase in pCO2 (r² = 0.91). Short-term climatic events such as Heinrich Stadials or Antarctic warming periods are not reflected by vegetation changes in the catchment area. Instead, smaller vegetation fluctuations during the Late Pleistocene occur in accordance with local variations of insolation. |
format |
Article in Journal/Newspaper |
author |
Badewien, Tanja Vogts, Angela Dupont, Lydie M Rullkötter, Jürgen |
author_facet |
Badewien, Tanja Vogts, Angela Dupont, Lydie M Rullkötter, Jürgen |
author_sort |
Badewien, Tanja |
title |
Chemical analysis with regard to global and local climatic forcing measured on sediment core GeoB3711-1, GeoB3711-3 and GeoB4917-8, supplement to: Badewien, Tanja; Vogts, Angela; Dupont, Lydie M; Rullkötter, Jürgen (2015): Influence of Late Pleistocene and Holocene climate on vegetation distributions in southwest Africa elucidated from sedimentary n-alkanes - Differences between 12°S and 20°S. Quaternary Science Reviews, 125, 160-171 |
title_short |
Chemical analysis with regard to global and local climatic forcing measured on sediment core GeoB3711-1, GeoB3711-3 and GeoB4917-8, supplement to: Badewien, Tanja; Vogts, Angela; Dupont, Lydie M; Rullkötter, Jürgen (2015): Influence of Late Pleistocene and Holocene climate on vegetation distributions in southwest Africa elucidated from sedimentary n-alkanes - Differences between 12°S and 20°S. Quaternary Science Reviews, 125, 160-171 |
title_full |
Chemical analysis with regard to global and local climatic forcing measured on sediment core GeoB3711-1, GeoB3711-3 and GeoB4917-8, supplement to: Badewien, Tanja; Vogts, Angela; Dupont, Lydie M; Rullkötter, Jürgen (2015): Influence of Late Pleistocene and Holocene climate on vegetation distributions in southwest Africa elucidated from sedimentary n-alkanes - Differences between 12°S and 20°S. Quaternary Science Reviews, 125, 160-171 |
title_fullStr |
Chemical analysis with regard to global and local climatic forcing measured on sediment core GeoB3711-1, GeoB3711-3 and GeoB4917-8, supplement to: Badewien, Tanja; Vogts, Angela; Dupont, Lydie M; Rullkötter, Jürgen (2015): Influence of Late Pleistocene and Holocene climate on vegetation distributions in southwest Africa elucidated from sedimentary n-alkanes - Differences between 12°S and 20°S. Quaternary Science Reviews, 125, 160-171 |
title_full_unstemmed |
Chemical analysis with regard to global and local climatic forcing measured on sediment core GeoB3711-1, GeoB3711-3 and GeoB4917-8, supplement to: Badewien, Tanja; Vogts, Angela; Dupont, Lydie M; Rullkötter, Jürgen (2015): Influence of Late Pleistocene and Holocene climate on vegetation distributions in southwest Africa elucidated from sedimentary n-alkanes - Differences between 12°S and 20°S. Quaternary Science Reviews, 125, 160-171 |
title_sort |
chemical analysis with regard to global and local climatic forcing measured on sediment core geob3711-1, geob3711-3 and geob4917-8, supplement to: badewien, tanja; vogts, angela; dupont, lydie m; rullkötter, jürgen (2015): influence of late pleistocene and holocene climate on vegetation distributions in southwest africa elucidated from sedimentary n-alkanes - differences between 12°s and 20°s. quaternary science reviews, 125, 160-171 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2015 |
url |
https://dx.doi.org/10.1594/pangaea.831446 https://doi.pangaea.de/10.1594/PANGAEA.831446 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
https://dx.doi.org/10.1016/j.quascirev.2015.08.004 |
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.831446 https://doi.org/10.1016/j.quascirev.2015.08.004 |
_version_ |
1766037551174385664 |