Multi-proxy speleothem-based reconstruction of mid-MIS 3 climate in South Africa
The southern coast of South Africa displays a highly dynamical climate as it is at the convergence of the Atlantic and Indian oceans, and it is located near the subtropical/temperate zone boundary with seasonal influence of easterlies and westerlies. The region hosts some key archeological sites wit...
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ftdoajarticles:oai:doaj.org/article:fc74fb277aa0469a8e555da191f8ecfb 2023-10-29T02:32:06+01:00 Multi-proxy speleothem-based reconstruction of mid-MIS 3 climate in South Africa J. Maccali A. N. Meckler S.-E. Lauritzen T. Brekken H. A. Rokkan A. Fernandez Y. Krüger J. Adigun S. Affolter M. Leuenberger 2023-09-01T00:00:00Z https://doi.org/10.5194/cp-19-1847-2023 https://doaj.org/article/fc74fb277aa0469a8e555da191f8ecfb EN eng Copernicus Publications https://cp.copernicus.org/articles/19/1847/2023/cp-19-1847-2023.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-19-1847-2023 1814-9324 1814-9332 https://doaj.org/article/fc74fb277aa0469a8e555da191f8ecfb Climate of the Past, Vol 19, Pp 1847-1862 (2023) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2023 ftdoajarticles https://doi.org/10.5194/cp-19-1847-2023 2023-10-01T00:41:13Z The southern coast of South Africa displays a highly dynamical climate as it is at the convergence of the Atlantic and Indian oceans, and it is located near the subtropical/temperate zone boundary with seasonal influence of easterlies and westerlies. The region hosts some key archeological sites with records of significant cognitive, technological and social developments. Reconstructions of the state and variability of past climate and environmental conditions around sites of archeological significance can provide crucial context for understanding the evolution of early humans. Here we present a short but high-resolution record of hydroclimate and temperature in South Africa. Our reconstructions are based on trace elements, calcite and fluid inclusion stable isotopes, as well as fluid inclusion microthermometry, from a speleothem collected in Bloukrantz cave, in the De Hoop Nature Reserve in the southern Cape region of South Africa. Our record covers the time period from 48.3 to 45.2 ka during marine isotope stage 3. Both δ 18 O c and δ 13 C c show strong variability and covary with Sr / Ca <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="33pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="d245c5bda2707cc6c23ca818ac751f9c"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cp-19-1847-2023-ie00001.svg" width="33pt" height="14pt" src="cp-19-1847-2023-ie00001.png"/></svg:svg> . This correlation suggests that the control on these proxies originates from internal cave processes such as prior carbonate precipitation, which we infer to be related to precipitation amount. The hydroclimate indicators furthermore suggest a shift towards overall drier conditions after 46 ka, coincident with cooling in Antarctica and drier conditions in the eastern part of South Africa corresponding to the summer rainfall zone (SRZ). Fluid inclusion-based temperature reconstructions show good agreement between the oxygen isotope and microthermometry methods, and results from the latter ... Article in Journal/Newspaper Antarc* Antarctica Directory of Open Access Journals: DOAJ Articles Climate of the Past 19 9 1847 1862 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 J. Maccali A. N. Meckler S.-E. Lauritzen T. Brekken H. A. Rokkan A. Fernandez Y. Krüger J. Adigun S. Affolter M. Leuenberger Multi-proxy speleothem-based reconstruction of mid-MIS 3 climate in South Africa |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
The southern coast of South Africa displays a highly dynamical climate as it is at the convergence of the Atlantic and Indian oceans, and it is located near the subtropical/temperate zone boundary with seasonal influence of easterlies and westerlies. The region hosts some key archeological sites with records of significant cognitive, technological and social developments. Reconstructions of the state and variability of past climate and environmental conditions around sites of archeological significance can provide crucial context for understanding the evolution of early humans. Here we present a short but high-resolution record of hydroclimate and temperature in South Africa. Our reconstructions are based on trace elements, calcite and fluid inclusion stable isotopes, as well as fluid inclusion microthermometry, from a speleothem collected in Bloukrantz cave, in the De Hoop Nature Reserve in the southern Cape region of South Africa. Our record covers the time period from 48.3 to 45.2 ka during marine isotope stage 3. Both δ 18 O c and δ 13 C c show strong variability and covary with Sr / Ca <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="33pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="d245c5bda2707cc6c23ca818ac751f9c"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cp-19-1847-2023-ie00001.svg" width="33pt" height="14pt" src="cp-19-1847-2023-ie00001.png"/></svg:svg> . This correlation suggests that the control on these proxies originates from internal cave processes such as prior carbonate precipitation, which we infer to be related to precipitation amount. The hydroclimate indicators furthermore suggest a shift towards overall drier conditions after 46 ka, coincident with cooling in Antarctica and drier conditions in the eastern part of South Africa corresponding to the summer rainfall zone (SRZ). Fluid inclusion-based temperature reconstructions show good agreement between the oxygen isotope and microthermometry methods, and results from the latter ... |
format |
Article in Journal/Newspaper |
author |
J. Maccali A. N. Meckler S.-E. Lauritzen T. Brekken H. A. Rokkan A. Fernandez Y. Krüger J. Adigun S. Affolter M. Leuenberger |
author_facet |
J. Maccali A. N. Meckler S.-E. Lauritzen T. Brekken H. A. Rokkan A. Fernandez Y. Krüger J. Adigun S. Affolter M. Leuenberger |
author_sort |
J. Maccali |
title |
Multi-proxy speleothem-based reconstruction of mid-MIS 3 climate in South Africa |
title_short |
Multi-proxy speleothem-based reconstruction of mid-MIS 3 climate in South Africa |
title_full |
Multi-proxy speleothem-based reconstruction of mid-MIS 3 climate in South Africa |
title_fullStr |
Multi-proxy speleothem-based reconstruction of mid-MIS 3 climate in South Africa |
title_full_unstemmed |
Multi-proxy speleothem-based reconstruction of mid-MIS 3 climate in South Africa |
title_sort |
multi-proxy speleothem-based reconstruction of mid-mis 3 climate in south africa |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/cp-19-1847-2023 https://doaj.org/article/fc74fb277aa0469a8e555da191f8ecfb |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Climate of the Past, Vol 19, Pp 1847-1862 (2023) |
op_relation |
https://cp.copernicus.org/articles/19/1847/2023/cp-19-1847-2023.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-19-1847-2023 1814-9324 1814-9332 https://doaj.org/article/fc74fb277aa0469a8e555da191f8ecfb |
op_doi |
https://doi.org/10.5194/cp-19-1847-2023 |
container_title |
Climate of the Past |
container_volume |
19 |
container_issue |
9 |
container_start_page |
1847 |
op_container_end_page |
1862 |
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1781053170111217664 |