Massive deposition of Sahelian dust on the Canary Island Lanzarote during North Atlantic Heinrich Events
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 multi...
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crcambridgeupr:10.1017/qua.2020.100 2024-03-03T08:42:07+00:00 Massive deposition of Sahelian dust on the Canary Island Lanzarote during North Atlantic Heinrich Events Heinrich, Hartmut Schmidt, Christoph Ziemen, Florian Mikolajewicz, Uwe Roettig, Christopher-Bastian 2021 http://dx.doi.org/10.1017/qua.2020.100 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589420001003 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research page 1-16 ISSN 0033-5894 1096-0287 General Earth and Planetary Sciences Earth-Surface Processes Arts and Humanities (miscellaneous) journal-article 2021 crcambridgeupr https://doi.org/10.1017/qua.2020.100 2024-02-08T08:33:58Z 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. Article in Journal/Newspaper Arctic North Atlantic Cambridge University Press Arctic Quaternary Research 101 51 66 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
General Earth and Planetary Sciences Earth-Surface Processes Arts and Humanities (miscellaneous) |
spellingShingle |
General Earth and Planetary Sciences Earth-Surface Processes Arts and Humanities (miscellaneous) Heinrich, Hartmut Schmidt, Christoph Ziemen, Florian Mikolajewicz, Uwe Roettig, Christopher-Bastian Massive deposition of Sahelian dust on the Canary Island Lanzarote during North Atlantic Heinrich Events |
topic_facet |
General Earth and Planetary Sciences Earth-Surface Processes Arts and Humanities (miscellaneous) |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Heinrich, Hartmut Schmidt, Christoph Ziemen, Florian Mikolajewicz, Uwe Roettig, Christopher-Bastian |
author_facet |
Heinrich, Hartmut Schmidt, Christoph Ziemen, Florian Mikolajewicz, Uwe Roettig, Christopher-Bastian |
author_sort |
Heinrich, Hartmut |
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 |
publisher |
Cambridge University Press (CUP) |
publishDate |
2021 |
url |
http://dx.doi.org/10.1017/qua.2020.100 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589420001003 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic North Atlantic |
genre_facet |
Arctic North Atlantic |
op_source |
Quaternary Research page 1-16 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
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_ |
1792497604337074176 |