Stable hydrogen isotopic composition (dD) and stable carbon isotopic composition (δ¹³C) of sediment core GeoB9508-5 off Senegal, supplement to: Niedermeyer, Eva M; Schefuß, Enno; Sessions, Alex L; Mulitza, Stefan; Mollenhauer, Gesine; Schulz, Michael; Wefer, Gerold (2010): Orbital- and millennial-scale changes in the hydrologic cycle and vegetation in the western African Sahel: Insights from individual plant wax delta D and d13C. Quaternary Science Reviews, 29(23-24), 2996-3005
To reconstruct variability of the West African monsoon and associated vegetation changes on precessional and millennial time scales, we analyzed a marine sediment core from the continental slope off Senegal spanning the past 44,000 years (44 ka). We used the stable hydrogen isotopic composition (dD)...
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ftdatacite:10.1594/pangaea.756999 2023-05-15T17:36:46+02:00 Stable hydrogen isotopic composition (dD) and stable carbon isotopic composition (δ¹³C) of sediment core GeoB9508-5 off Senegal, supplement to: Niedermeyer, Eva M; Schefuß, Enno; Sessions, Alex L; Mulitza, Stefan; Mollenhauer, Gesine; Schulz, Michael; Wefer, Gerold (2010): Orbital- and millennial-scale changes in the hydrologic cycle and vegetation in the western African Sahel: Insights from individual plant wax delta D and d13C. Quaternary Science Reviews, 29(23-24), 2996-3005 Niedermeyer, Eva M Schefuß, Enno Sessions, Alex L Mulitza, Stefan Mollenhauer, Gesine Schulz, Michael Wefer, Gerold 2010 application/zip https://dx.doi.org/10.1594/pangaea.756999 https://doi.pangaea.de/10.1594/PANGAEA.756999 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1016/j.quascirev.2010.06.039 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Gravity corer Kiel type M65/1 Meteor 1986 Center for Marine Environmental Sciences MARUM Supplementary Collection of Datasets Collection article 2010 ftdatacite https://doi.org/10.1594/pangaea.756999 https://doi.org/10.1016/j.quascirev.2010.06.039 2022-02-08T16:24:46Z To reconstruct variability of the West African monsoon and associated vegetation changes on precessional and millennial time scales, we analyzed a marine sediment core from the continental slope off Senegal spanning the past 44,000 years (44 ka). We used the stable hydrogen isotopic composition (dD) of individual terrestrial plant wax n-alkanes as a proxy for past rainfall variability. The abundance and stable carbon isotopic composition (d13C) of the same compounds were analyzed to assess changes in vegetation composition (C3/C4 plants) and density. The dD record reveals two wet periods that coincide with local maximum summer insolation from 38 to 28 ka and 15 to 4 ka and that are separated by a less wet period during minimum summer insolation. Our data indicate that rainfall intensity during the rainy season throughout both wet humid periods was similar, whereas the length of the rainy season was presumably shorter during the last glacial than during the Holocene. Additional dry intervals are identified that coincide with North Atlantic Heinrich stadials and the Younger Dryas interval, indicating that the West African monsoon over tropical northwest Africa is linked to both insolation forcing and high-latitude climate variability. The d13C record indicates that vegetation of the western Sahel was consistently dominated by C4 plants during the past 44 ka, whereas C3-type vegetation increased during the Holocene. Moreover, we observe a gradual ending of the Holocene humid period together with unchanging ratio of C3 to C4 plants, indicating that an abrupt aridification due to vegetation feedbacks is not a general characteristic of this time interval. Article in Journal/Newspaper North Atlantic DataCite Metadata Store (German National Library of Science and Technology) |
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collection |
DataCite Metadata Store (German National Library of Science and Technology) |
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language |
English |
topic |
Gravity corer Kiel type M65/1 Meteor 1986 Center for Marine Environmental Sciences MARUM |
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Gravity corer Kiel type M65/1 Meteor 1986 Center for Marine Environmental Sciences MARUM Niedermeyer, Eva M Schefuß, Enno Sessions, Alex L Mulitza, Stefan Mollenhauer, Gesine Schulz, Michael Wefer, Gerold Stable hydrogen isotopic composition (dD) and stable carbon isotopic composition (δ¹³C) of sediment core GeoB9508-5 off Senegal, supplement to: Niedermeyer, Eva M; Schefuß, Enno; Sessions, Alex L; Mulitza, Stefan; Mollenhauer, Gesine; Schulz, Michael; Wefer, Gerold (2010): Orbital- and millennial-scale changes in the hydrologic cycle and vegetation in the western African Sahel: Insights from individual plant wax delta D and d13C. Quaternary Science Reviews, 29(23-24), 2996-3005 |
topic_facet |
Gravity corer Kiel type M65/1 Meteor 1986 Center for Marine Environmental Sciences MARUM |
description |
To reconstruct variability of the West African monsoon and associated vegetation changes on precessional and millennial time scales, we analyzed a marine sediment core from the continental slope off Senegal spanning the past 44,000 years (44 ka). We used the stable hydrogen isotopic composition (dD) of individual terrestrial plant wax n-alkanes as a proxy for past rainfall variability. The abundance and stable carbon isotopic composition (d13C) of the same compounds were analyzed to assess changes in vegetation composition (C3/C4 plants) and density. The dD record reveals two wet periods that coincide with local maximum summer insolation from 38 to 28 ka and 15 to 4 ka and that are separated by a less wet period during minimum summer insolation. Our data indicate that rainfall intensity during the rainy season throughout both wet humid periods was similar, whereas the length of the rainy season was presumably shorter during the last glacial than during the Holocene. Additional dry intervals are identified that coincide with North Atlantic Heinrich stadials and the Younger Dryas interval, indicating that the West African monsoon over tropical northwest Africa is linked to both insolation forcing and high-latitude climate variability. The d13C record indicates that vegetation of the western Sahel was consistently dominated by C4 plants during the past 44 ka, whereas C3-type vegetation increased during the Holocene. Moreover, we observe a gradual ending of the Holocene humid period together with unchanging ratio of C3 to C4 plants, indicating that an abrupt aridification due to vegetation feedbacks is not a general characteristic of this time interval. |
format |
Article in Journal/Newspaper |
author |
Niedermeyer, Eva M Schefuß, Enno Sessions, Alex L Mulitza, Stefan Mollenhauer, Gesine Schulz, Michael Wefer, Gerold |
author_facet |
Niedermeyer, Eva M Schefuß, Enno Sessions, Alex L Mulitza, Stefan Mollenhauer, Gesine Schulz, Michael Wefer, Gerold |
author_sort |
Niedermeyer, Eva M |
title |
Stable hydrogen isotopic composition (dD) and stable carbon isotopic composition (δ¹³C) of sediment core GeoB9508-5 off Senegal, supplement to: Niedermeyer, Eva M; Schefuß, Enno; Sessions, Alex L; Mulitza, Stefan; Mollenhauer, Gesine; Schulz, Michael; Wefer, Gerold (2010): Orbital- and millennial-scale changes in the hydrologic cycle and vegetation in the western African Sahel: Insights from individual plant wax delta D and d13C. Quaternary Science Reviews, 29(23-24), 2996-3005 |
title_short |
Stable hydrogen isotopic composition (dD) and stable carbon isotopic composition (δ¹³C) of sediment core GeoB9508-5 off Senegal, supplement to: Niedermeyer, Eva M; Schefuß, Enno; Sessions, Alex L; Mulitza, Stefan; Mollenhauer, Gesine; Schulz, Michael; Wefer, Gerold (2010): Orbital- and millennial-scale changes in the hydrologic cycle and vegetation in the western African Sahel: Insights from individual plant wax delta D and d13C. Quaternary Science Reviews, 29(23-24), 2996-3005 |
title_full |
Stable hydrogen isotopic composition (dD) and stable carbon isotopic composition (δ¹³C) of sediment core GeoB9508-5 off Senegal, supplement to: Niedermeyer, Eva M; Schefuß, Enno; Sessions, Alex L; Mulitza, Stefan; Mollenhauer, Gesine; Schulz, Michael; Wefer, Gerold (2010): Orbital- and millennial-scale changes in the hydrologic cycle and vegetation in the western African Sahel: Insights from individual plant wax delta D and d13C. Quaternary Science Reviews, 29(23-24), 2996-3005 |
title_fullStr |
Stable hydrogen isotopic composition (dD) and stable carbon isotopic composition (δ¹³C) of sediment core GeoB9508-5 off Senegal, supplement to: Niedermeyer, Eva M; Schefuß, Enno; Sessions, Alex L; Mulitza, Stefan; Mollenhauer, Gesine; Schulz, Michael; Wefer, Gerold (2010): Orbital- and millennial-scale changes in the hydrologic cycle and vegetation in the western African Sahel: Insights from individual plant wax delta D and d13C. Quaternary Science Reviews, 29(23-24), 2996-3005 |
title_full_unstemmed |
Stable hydrogen isotopic composition (dD) and stable carbon isotopic composition (δ¹³C) of sediment core GeoB9508-5 off Senegal, supplement to: Niedermeyer, Eva M; Schefuß, Enno; Sessions, Alex L; Mulitza, Stefan; Mollenhauer, Gesine; Schulz, Michael; Wefer, Gerold (2010): Orbital- and millennial-scale changes in the hydrologic cycle and vegetation in the western African Sahel: Insights from individual plant wax delta D and d13C. Quaternary Science Reviews, 29(23-24), 2996-3005 |
title_sort |
stable hydrogen isotopic composition (dd) and stable carbon isotopic composition (δ¹³c) of sediment core geob9508-5 off senegal, supplement to: niedermeyer, eva m; schefuß, enno; sessions, alex l; mulitza, stefan; mollenhauer, gesine; schulz, michael; wefer, gerold (2010): orbital- and millennial-scale changes in the hydrologic cycle and vegetation in the western african sahel: insights from individual plant wax delta d and d13c. quaternary science reviews, 29(23-24), 2996-3005 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2010 |
url |
https://dx.doi.org/10.1594/pangaea.756999 https://doi.pangaea.de/10.1594/PANGAEA.756999 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://dx.doi.org/10.1016/j.quascirev.2010.06.039 |
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.756999 https://doi.org/10.1016/j.quascirev.2010.06.039 |
_version_ |
1766136365615939584 |