Mid- to late Holocene Indian Ocean Monsoon variability recorded in four speleothems from Socotra Island, Yemen
Four stalagmites covering the last 7.0 ka were sampled on Socotra, an island in the northern Indian Ocean to investigate the evolution of the northeast Indian Ocean Monsoon (IOM) since the mid Holocene. On Socotra, rain is delivered at the start of the southwest IOM in May–June and at the start of t...
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ftunivbern:oai:boris.unibe.ch:49679 2023-08-20T04:06:58+02:00 Mid- to late Holocene Indian Ocean Monsoon variability recorded in four speleothems from Socotra Island, Yemen Van Rampelbergh, Maïté Fleitmann, Dominik Verheyden, Sophie Cheng, Hai Edwards, Lawrence De Geest, Peter De Vleeschouwer, David Burns, Stephen J. Matter, Albert Claeys, Philippe Keppens, Eddy 2013 application/pdf https://boris.unibe.ch/49679/1/Mid-%20to%20late%20Holocene%20Indian%20Ocean%20Monsoon%20variability%20recorded%20in.pdf https://boris.unibe.ch/49679/ eng eng Pergamon https://boris.unibe.ch/49679/ info:eu-repo/semantics/restrictedAccess Van Rampelbergh, Maïté; Fleitmann, Dominik; Verheyden, Sophie; Cheng, Hai; Edwards, Lawrence; De Geest, Peter; De Vleeschouwer, David; Burns, Stephen J.; Matter, Albert; Claeys, Philippe; Keppens, Eddy (2013). Mid- to late Holocene Indian Ocean Monsoon variability recorded in four speleothems from Socotra Island, Yemen. Quaternary Science Reviews, 65, pp. 129-142. Pergamon 10.1016/j.quascirev.2013.01.016 <http://dx.doi.org/10.1016/j.quascirev.2013.01.016> 550 Earth sciences & geology info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 2013 ftunivbern https://doi.org/10.1016/j.quascirev.2013.01.016 2023-07-31T21:07:10Z Four stalagmites covering the last 7.0 ka were sampled on Socotra, an island in the northern Indian Ocean to investigate the evolution of the northeast Indian Ocean Monsoon (IOM) since the mid Holocene. On Socotra, rain is delivered at the start of the southwest IOM in May–June and at the start of the northeast IOM from September to December. The Haggeher Mountains act as a barrier forcing precipitation brought by the northeast winds to fall preferentially on the eastern side of the island, where the studied caves are located. δ18O and δ13C and Mg/Ca and Sr/Ca signals in the stalagmites reflect precipitation amounts brought by the northeast winds. For stalagmite STM6, this amount effect is amplified by kinetic effects during calcite deposition. Combined interpretation of the stalagmites' signals suggest a weakening of the northeast precipitation between 6.0 and 3.8 ka. After 3.8 ka precipitation intensities remain constant with two superimposed drier periods, between 0 and 0.6 ka and from 2.2 to 3.8 ka. No link can be established with Greenland ice cores and with the summer IOM variability. In contrast to the stable northeast rainy season suggested by the records in this study, speleothem records from western Socotra indicate a wettening of the southwest rainy season on Socotra after 4.4 ka. The local wettening of western Socotra could relate to a more southerly path (more over the Indian Ocean) taken by the southwest winds. Stalagmite STM5, sampled at the fringe between both rain areas displays intermediate δ18O values. After 6.2 ka, similar precipitation changes are seen between eastern Socotra and northern Oman indicating that both regions are affected similarly by the monsoon. Different palaeoclimatologic records from the Arabian Peninsula currently located outside the ITCZ migration pathway display an abrupt drying around 6 ka due to their disconnection from the southwest rain influence. Records that are nowadays still receiving rain by the southwest winds, suggest a more gradual drying reflecting the ... Article in Journal/Newspaper Greenland Greenland ice cores BORIS (Bern Open Repository and Information System, University of Bern) Greenland Indian Quaternary Science Reviews 65 129 142 |
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Open Polar |
collection |
BORIS (Bern Open Repository and Information System, University of Bern) |
op_collection_id |
ftunivbern |
language |
English |
topic |
550 Earth sciences & geology |
spellingShingle |
550 Earth sciences & geology Van Rampelbergh, Maïté Fleitmann, Dominik Verheyden, Sophie Cheng, Hai Edwards, Lawrence De Geest, Peter De Vleeschouwer, David Burns, Stephen J. Matter, Albert Claeys, Philippe Keppens, Eddy Mid- to late Holocene Indian Ocean Monsoon variability recorded in four speleothems from Socotra Island, Yemen |
topic_facet |
550 Earth sciences & geology |
description |
Four stalagmites covering the last 7.0 ka were sampled on Socotra, an island in the northern Indian Ocean to investigate the evolution of the northeast Indian Ocean Monsoon (IOM) since the mid Holocene. On Socotra, rain is delivered at the start of the southwest IOM in May–June and at the start of the northeast IOM from September to December. The Haggeher Mountains act as a barrier forcing precipitation brought by the northeast winds to fall preferentially on the eastern side of the island, where the studied caves are located. δ18O and δ13C and Mg/Ca and Sr/Ca signals in the stalagmites reflect precipitation amounts brought by the northeast winds. For stalagmite STM6, this amount effect is amplified by kinetic effects during calcite deposition. Combined interpretation of the stalagmites' signals suggest a weakening of the northeast precipitation between 6.0 and 3.8 ka. After 3.8 ka precipitation intensities remain constant with two superimposed drier periods, between 0 and 0.6 ka and from 2.2 to 3.8 ka. No link can be established with Greenland ice cores and with the summer IOM variability. In contrast to the stable northeast rainy season suggested by the records in this study, speleothem records from western Socotra indicate a wettening of the southwest rainy season on Socotra after 4.4 ka. The local wettening of western Socotra could relate to a more southerly path (more over the Indian Ocean) taken by the southwest winds. Stalagmite STM5, sampled at the fringe between both rain areas displays intermediate δ18O values. After 6.2 ka, similar precipitation changes are seen between eastern Socotra and northern Oman indicating that both regions are affected similarly by the monsoon. Different palaeoclimatologic records from the Arabian Peninsula currently located outside the ITCZ migration pathway display an abrupt drying around 6 ka due to their disconnection from the southwest rain influence. Records that are nowadays still receiving rain by the southwest winds, suggest a more gradual drying reflecting the ... |
format |
Article in Journal/Newspaper |
author |
Van Rampelbergh, Maïté Fleitmann, Dominik Verheyden, Sophie Cheng, Hai Edwards, Lawrence De Geest, Peter De Vleeschouwer, David Burns, Stephen J. Matter, Albert Claeys, Philippe Keppens, Eddy |
author_facet |
Van Rampelbergh, Maïté Fleitmann, Dominik Verheyden, Sophie Cheng, Hai Edwards, Lawrence De Geest, Peter De Vleeschouwer, David Burns, Stephen J. Matter, Albert Claeys, Philippe Keppens, Eddy |
author_sort |
Van Rampelbergh, Maïté |
title |
Mid- to late Holocene Indian Ocean Monsoon variability recorded in four speleothems from Socotra Island, Yemen |
title_short |
Mid- to late Holocene Indian Ocean Monsoon variability recorded in four speleothems from Socotra Island, Yemen |
title_full |
Mid- to late Holocene Indian Ocean Monsoon variability recorded in four speleothems from Socotra Island, Yemen |
title_fullStr |
Mid- to late Holocene Indian Ocean Monsoon variability recorded in four speleothems from Socotra Island, Yemen |
title_full_unstemmed |
Mid- to late Holocene Indian Ocean Monsoon variability recorded in four speleothems from Socotra Island, Yemen |
title_sort |
mid- to late holocene indian ocean monsoon variability recorded in four speleothems from socotra island, yemen |
publisher |
Pergamon |
publishDate |
2013 |
url |
https://boris.unibe.ch/49679/1/Mid-%20to%20late%20Holocene%20Indian%20Ocean%20Monsoon%20variability%20recorded%20in.pdf https://boris.unibe.ch/49679/ |
geographic |
Greenland Indian |
geographic_facet |
Greenland Indian |
genre |
Greenland Greenland ice cores |
genre_facet |
Greenland Greenland ice cores |
op_source |
Van Rampelbergh, Maïté; Fleitmann, Dominik; Verheyden, Sophie; Cheng, Hai; Edwards, Lawrence; De Geest, Peter; De Vleeschouwer, David; Burns, Stephen J.; Matter, Albert; Claeys, Philippe; Keppens, Eddy (2013). Mid- to late Holocene Indian Ocean Monsoon variability recorded in four speleothems from Socotra Island, Yemen. Quaternary Science Reviews, 65, pp. 129-142. Pergamon 10.1016/j.quascirev.2013.01.016 <http://dx.doi.org/10.1016/j.quascirev.2013.01.016> |
op_relation |
https://boris.unibe.ch/49679/ |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2013.01.016 |
container_title |
Quaternary Science Reviews |
container_volume |
65 |
container_start_page |
129 |
op_container_end_page |
142 |
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1774718360379981824 |