Characterization of the last deglacial transition in tropical East Africa: Insights from Lake Albert
New biomarker analyses from Lake Albert, East Africa spanning ~15–9 ka show the most extreme, abrupt, multi-stage climate and environmental shifts during the last deglacial transition of anywhere in Africa. Records of hydroclimate expressed in compound specific δD values from terrestrial leaf waxes...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
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Elsevier
2014
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| Online Access: | http://hdl.handle.net/20.500.11937/22854 |
| _version_ | 1848750988629901312 |
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| author | Berke, M. Johnson, T. Werne, Josef Livingstone, D. Grice, Kliti Schouten, S. Sinninghe Damsté, J. |
| author_facet | Berke, M. Johnson, T. Werne, Josef Livingstone, D. Grice, Kliti Schouten, S. Sinninghe Damsté, J. |
| author_sort | Berke, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | New biomarker analyses from Lake Albert, East Africa spanning ~15–9 ka show the most extreme, abrupt, multi-stage climate and environmental shifts during the last deglacial transition of anywhere in Africa. Records of hydroclimate expressed in compound specific δD values from terrestrial leaf waxes and a TEX86 paleotemperature record support multiple stages of pronounced drying and cooling from 13.8 to 11.5 ka and demonstrate the dynamic behavior of the low latitude tropics during the deglaciation. The vegetation response, illustrated by compound specific δ13C values and fossil pollen records, was an expansion of C4 grassland when the region was cool and arid. These results advance our understanding of a spatially and temporally complex regional response to global climate forcing, suggesting weakening of the Indian Ocean monsoon at the end of the Pleistocene that coincides with a minor decrease in the rate of the Atlantic Meridional Overturning Circulation (AMOC) and during a time of stepwise cooling in the northern high latitudes. |
| first_indexed | 2025-11-14T07:45:35Z |
| format | Journal Article |
| id | curtin-20.500.11937-22854 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:45:35Z |
| publishDate | 2014 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-228542017-09-13T13:56:22Z Characterization of the last deglacial transition in tropical East Africa: Insights from Lake Albert Berke, M. Johnson, T. Werne, Josef Livingstone, D. Grice, Kliti Schouten, S. Sinninghe Damsté, J. African paleoclimate isotopes TEX86 paleotemperature Sedimentary molecular biomarkers Deglaciation Lake Albert Compound specific carbon and hydrogen New biomarker analyses from Lake Albert, East Africa spanning ~15–9 ka show the most extreme, abrupt, multi-stage climate and environmental shifts during the last deglacial transition of anywhere in Africa. Records of hydroclimate expressed in compound specific δD values from terrestrial leaf waxes and a TEX86 paleotemperature record support multiple stages of pronounced drying and cooling from 13.8 to 11.5 ka and demonstrate the dynamic behavior of the low latitude tropics during the deglaciation. The vegetation response, illustrated by compound specific δ13C values and fossil pollen records, was an expansion of C4 grassland when the region was cool and arid. These results advance our understanding of a spatially and temporally complex regional response to global climate forcing, suggesting weakening of the Indian Ocean monsoon at the end of the Pleistocene that coincides with a minor decrease in the rate of the Atlantic Meridional Overturning Circulation (AMOC) and during a time of stepwise cooling in the northern high latitudes. 2014 Journal Article http://hdl.handle.net/20.500.11937/22854 10.1016/j.palaeo.2014.04.014 Elsevier restricted |
| spellingShingle | African paleoclimate isotopes TEX86 paleotemperature Sedimentary molecular biomarkers Deglaciation Lake Albert Compound specific carbon and hydrogen Berke, M. Johnson, T. Werne, Josef Livingstone, D. Grice, Kliti Schouten, S. Sinninghe Damsté, J. Characterization of the last deglacial transition in tropical East Africa: Insights from Lake Albert |
| title | Characterization of the last deglacial transition in tropical East Africa: Insights from Lake Albert |
| title_full | Characterization of the last deglacial transition in tropical East Africa: Insights from Lake Albert |
| title_fullStr | Characterization of the last deglacial transition in tropical East Africa: Insights from Lake Albert |
| title_full_unstemmed | Characterization of the last deglacial transition in tropical East Africa: Insights from Lake Albert |
| title_short | Characterization of the last deglacial transition in tropical East Africa: Insights from Lake Albert |
| title_sort | characterization of the last deglacial transition in tropical east africa: insights from lake albert |
| topic | African paleoclimate isotopes TEX86 paleotemperature Sedimentary molecular biomarkers Deglaciation Lake Albert Compound specific carbon and hydrogen |
| url | http://hdl.handle.net/20.500.11937/22854 |