Massive deposition of Sahelian dust on the Canary Island Lanzarote during North Atlantic Heinrich Events
New IRSL ages of eolianites close to Muñique (Lanzarote) demonstrate the influence of millennial scale climatic variability on the sedimentary dynamics on the Canary Islands during the last glacial cycle. The repetitive succession of interstadial and stadial climatic conditions formed multiple seque...
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ftpubman:oai:pure.mpg.de:item_3248491 2023-08-27T04:07:57+02:00 Massive deposition of Sahelian dust on the Canary Island Lanzarote during North Atlantic Heinrich Events Heinrich, H. Schmidt, C. Roettig, C. Ziemen, F. Mikolajewicz, U. Faust, D. 2021-01-19 application/vnd.openxmlformats-officedocument.wordprocessingml.document application/pdf http://hdl.handle.net/21.11116/0000-0007-B6EF-F http://hdl.handle.net/21.11116/0000-0007-B6F2-A http://hdl.handle.net/21.11116/0000-0007-B6F3-9 http://hdl.handle.net/21.11116/0000-0008-98AB-C eng eng info:eu-repo/semantics/altIdentifier/doi/10.1017/qua.2020.100 http://hdl.handle.net/21.11116/0000-0007-B6EF-F http://hdl.handle.net/21.11116/0000-0007-B6F2-A http://hdl.handle.net/21.11116/0000-0007-B6F3-9 http://hdl.handle.net/21.11116/0000-0008-98AB-C Quaternary Research info:eu-repo/semantics/article 2021 ftpubman https://doi.org/10.1017/qua.2020.100 2023-08-02T01:45:37Z New IRSL ages of eolianites close to Muñique (Lanzarote) demonstrate the influence of millennial scale climatic variability on the sedimentary dynamics on the Canary Islands during the last glacial cycle. The repetitive succession of interstadial and stadial climatic conditions formed multiple sequences of eolian deposits, each in general comprising three depositional types. DepoType 1 and DepoType 2 consist mainly of marine biogenic carbonate detritus with small amounts of dust from the Sahara representing interstadial conditions. DepoType 2 compared to DepoType 1 is characterized by larger amounts of land snails and calcified brood cells. A DepoType 3 rich in dust from African subtropical/tropical Latisols terminates a sequence. IRSL dating on DepoType 3 type deposits clearly shows that these were deposited during Heinrich Events under stadial conditions. The stadial cooling of the North Atlantic Ocean caused a southern shift of climate zones that culminated during Heinrich Events when the arctic climate reaches its most southerly extent. As a consequence, atmospheric changes led to massive dust supply from the then-dry Sahel. The increase in dust and precipitation from the dry DepoTypes 1 to the more humid DepoTypes 3 originates from a modified atmospheric dynamic during a millennial cycle. Article in Journal/Newspaper Arctic North Atlantic Max Planck Society: MPG.PuRe Arctic Quaternary Research 101 51 66 |
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Open Polar |
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Max Planck Society: MPG.PuRe |
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ftpubman |
language |
English |
description |
New IRSL ages of eolianites close to Muñique (Lanzarote) demonstrate the influence of millennial scale climatic variability on the sedimentary dynamics on the Canary Islands during the last glacial cycle. The repetitive succession of interstadial and stadial climatic conditions formed multiple sequences of eolian deposits, each in general comprising three depositional types. DepoType 1 and DepoType 2 consist mainly of marine biogenic carbonate detritus with small amounts of dust from the Sahara representing interstadial conditions. DepoType 2 compared to DepoType 1 is characterized by larger amounts of land snails and calcified brood cells. A DepoType 3 rich in dust from African subtropical/tropical Latisols terminates a sequence. IRSL dating on DepoType 3 type deposits clearly shows that these were deposited during Heinrich Events under stadial conditions. The stadial cooling of the North Atlantic Ocean caused a southern shift of climate zones that culminated during Heinrich Events when the arctic climate reaches its most southerly extent. As a consequence, atmospheric changes led to massive dust supply from the then-dry Sahel. The increase in dust and precipitation from the dry DepoTypes 1 to the more humid DepoTypes 3 originates from a modified atmospheric dynamic during a millennial cycle. |
format |
Article in Journal/Newspaper |
author |
Heinrich, H. Schmidt, C. Roettig, C. Ziemen, F. Mikolajewicz, U. Faust, D. |
spellingShingle |
Heinrich, H. Schmidt, C. Roettig, C. Ziemen, F. Mikolajewicz, U. Faust, D. Massive deposition of Sahelian dust on the Canary Island Lanzarote during North Atlantic Heinrich Events |
author_facet |
Heinrich, H. Schmidt, C. Roettig, C. Ziemen, F. Mikolajewicz, U. Faust, D. |
author_sort |
Heinrich, H. |
title |
Massive deposition of Sahelian dust on the Canary Island Lanzarote during North Atlantic Heinrich Events |
title_short |
Massive deposition of Sahelian dust on the Canary Island Lanzarote during North Atlantic Heinrich Events |
title_full |
Massive deposition of Sahelian dust on the Canary Island Lanzarote during North Atlantic Heinrich Events |
title_fullStr |
Massive deposition of Sahelian dust on the Canary Island Lanzarote during North Atlantic Heinrich Events |
title_full_unstemmed |
Massive deposition of Sahelian dust on the Canary Island Lanzarote during North Atlantic Heinrich Events |
title_sort |
massive deposition of sahelian dust on the canary island lanzarote during north atlantic heinrich events |
publishDate |
2021 |
url |
http://hdl.handle.net/21.11116/0000-0007-B6EF-F http://hdl.handle.net/21.11116/0000-0007-B6F2-A http://hdl.handle.net/21.11116/0000-0007-B6F3-9 http://hdl.handle.net/21.11116/0000-0008-98AB-C |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic North Atlantic |
genre_facet |
Arctic North Atlantic |
op_source |
Quaternary Research |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1017/qua.2020.100 http://hdl.handle.net/21.11116/0000-0007-B6EF-F http://hdl.handle.net/21.11116/0000-0007-B6F2-A http://hdl.handle.net/21.11116/0000-0007-B6F3-9 http://hdl.handle.net/21.11116/0000-0008-98AB-C |
op_doi |
https://doi.org/10.1017/qua.2020.100 |
container_title |
Quaternary Research |
container_volume |
101 |
container_start_page |
51 |
op_container_end_page |
66 |
_version_ |
1775348671492128768 |