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  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). Massive deposition of Sahelian dust on the Canary Island Lanzarote during North Atlantic Heinrich Events. Quaternary Research, 101, 51-66. doi:10.1017/qua.2020.100.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0007-B6EF-F Version Permalink: https://hdl.handle.net/21.11116/0000-000C-DD60-F
Genre: Journal Article

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 Creators:
Heinrich, H., Author
Schmidt, C., Author
Roettig, C.B., Author
Ziemen, Florian, Author           
Mikolajewicz, Uwe1, Author           
Faust, D., Author
Affiliations:
1Ocean Physics, The Ocean in the Earth System, MPI for Meteorology, Max Planck Society, ou_913557              

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 Abstract: 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.

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Language(s): eng - English
 Dates: 2020-042021-012021-01-19
 Publication Status: Published online
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 Rev. Type: Peer
 Identifiers: DOI: 10.1017/qua.2020.100
BibTex Citekey: HeinrichSchmidtEtAl2021
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Title: Quaternary Research
Source Genre: Journal
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Publ. Info: Orlando, Fla. : Academic Press
Pages: - Volume / Issue: 101 Sequence Number: - Start / End Page: 51 - 66 Identifier: ISSN: 0033-5894
CoNE: https://pure.mpg.de/cone/journals/resource/954922646057