Climate variability at the southern boundaries of the Namib (southwestern Africa) and Atacama (northern Chile) coastal deserts during the last 120,000 yr
In this study, we present grain-size distributions of the terrigenous fraction of two deep-sea sediment cores from the SE Atlantic (offshore Namibia) and from the SE Pacific (offshore northern Chile), which we 'unmix' into subpopulations and which are interpreted as coarse eolian dust, fin...
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Online Access: | https://research.vu.nl/en/publications/96555d91-4e0a-490f-8458-1e8280869c96 https://doi.org/10.1016/j.yqres.2004.08.001 http://hdl.handle.net/1871.1/96555d91-4e0a-490f-8458-1e8280869c96 http://www.scopus.com/inward/record.url?scp=8644230998&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=8644230998&partnerID=8YFLogxK |
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ftvuamstcris:oai:research.vu.nl:publications/96555d91-4e0a-490f-8458-1e8280869c96 2023-05-15T13:32:38+02:00 Climate variability at the southern boundaries of the Namib (southwestern Africa) and Atacama (northern Chile) coastal deserts during the last 120,000 yr Stuut, Jan Berend W Lamy, Frank 2004-11-01 https://research.vu.nl/en/publications/96555d91-4e0a-490f-8458-1e8280869c96 https://doi.org/10.1016/j.yqres.2004.08.001 http://hdl.handle.net/1871.1/96555d91-4e0a-490f-8458-1e8280869c96 http://www.scopus.com/inward/record.url?scp=8644230998&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=8644230998&partnerID=8YFLogxK eng eng info:eu-repo/semantics/restrictedAccess Stuut , J B W & Lamy , F 2004 , ' Climate variability at the southern boundaries of the Namib (southwestern Africa) and Atacama (northern Chile) coastal deserts during the last 120,000 yr ' , Quaternary Research , vol. 62 , no. 3 , pp. 301-309 . https://doi.org/10.1016/j.yqres.2004.08.001 Aridity Atacama Desert Chile End-member modeling Grain size Late Quaternary Namib Desert Southern Westerlies Southwestern Africa article 2004 ftvuamstcris https://doi.org/10.1016/j.yqres.2004.08.001 2022-01-17T13:31:50Z In this study, we present grain-size distributions of the terrigenous fraction of two deep-sea sediment cores from the SE Atlantic (offshore Namibia) and from the SE Pacific (offshore northern Chile), which we 'unmix' into subpopulations and which are interpreted as coarse eolian dust, fine eolian dust, and fluvial mud. The downcore ratios of the proportions of eolian dust and fluvial mud subsequently represent paleocontinental aridity records of southwestern Africa and northern Chile for the last 120,000 yr. The two records show a relatively wet Last Glacial Maximum (LGM) compared to a relatively dry Holocene, but different orbital variability on longer time scales. Generally, the northern Chilean aridity record shows higher-frequency changes, which are closely related to precessional variation in solar insolation, compared to the southwestern African aridity record, which shows a remarkable resemblance to the global ice-volume record. We relate the changes in continental aridity in southwestern Africa and northern Chile to changes in the latitudinal position of the moisture-bearing Southern Westerlies, potentially driven by the sea-ice extent around Antarctica and overprinted by tropical forcing in the equatorial Pacific Ocean. Article in Journal/Newspaper Antarc* Antarctica Sea ice Vrije Universiteit Amsterdam (VU): Research Portal Pacific Quaternary Research 62 3 301 309 |
institution |
Open Polar |
collection |
Vrije Universiteit Amsterdam (VU): Research Portal |
op_collection_id |
ftvuamstcris |
language |
English |
topic |
Aridity Atacama Desert Chile End-member modeling Grain size Late Quaternary Namib Desert Southern Westerlies Southwestern Africa |
spellingShingle |
Aridity Atacama Desert Chile End-member modeling Grain size Late Quaternary Namib Desert Southern Westerlies Southwestern Africa Stuut, Jan Berend W Lamy, Frank Climate variability at the southern boundaries of the Namib (southwestern Africa) and Atacama (northern Chile) coastal deserts during the last 120,000 yr |
topic_facet |
Aridity Atacama Desert Chile End-member modeling Grain size Late Quaternary Namib Desert Southern Westerlies Southwestern Africa |
description |
In this study, we present grain-size distributions of the terrigenous fraction of two deep-sea sediment cores from the SE Atlantic (offshore Namibia) and from the SE Pacific (offshore northern Chile), which we 'unmix' into subpopulations and which are interpreted as coarse eolian dust, fine eolian dust, and fluvial mud. The downcore ratios of the proportions of eolian dust and fluvial mud subsequently represent paleocontinental aridity records of southwestern Africa and northern Chile for the last 120,000 yr. The two records show a relatively wet Last Glacial Maximum (LGM) compared to a relatively dry Holocene, but different orbital variability on longer time scales. Generally, the northern Chilean aridity record shows higher-frequency changes, which are closely related to precessional variation in solar insolation, compared to the southwestern African aridity record, which shows a remarkable resemblance to the global ice-volume record. We relate the changes in continental aridity in southwestern Africa and northern Chile to changes in the latitudinal position of the moisture-bearing Southern Westerlies, potentially driven by the sea-ice extent around Antarctica and overprinted by tropical forcing in the equatorial Pacific Ocean. |
format |
Article in Journal/Newspaper |
author |
Stuut, Jan Berend W Lamy, Frank |
author_facet |
Stuut, Jan Berend W Lamy, Frank |
author_sort |
Stuut, Jan Berend W |
title |
Climate variability at the southern boundaries of the Namib (southwestern Africa) and Atacama (northern Chile) coastal deserts during the last 120,000 yr |
title_short |
Climate variability at the southern boundaries of the Namib (southwestern Africa) and Atacama (northern Chile) coastal deserts during the last 120,000 yr |
title_full |
Climate variability at the southern boundaries of the Namib (southwestern Africa) and Atacama (northern Chile) coastal deserts during the last 120,000 yr |
title_fullStr |
Climate variability at the southern boundaries of the Namib (southwestern Africa) and Atacama (northern Chile) coastal deserts during the last 120,000 yr |
title_full_unstemmed |
Climate variability at the southern boundaries of the Namib (southwestern Africa) and Atacama (northern Chile) coastal deserts during the last 120,000 yr |
title_sort |
climate variability at the southern boundaries of the namib (southwestern africa) and atacama (northern chile) coastal deserts during the last 120,000 yr |
publishDate |
2004 |
url |
https://research.vu.nl/en/publications/96555d91-4e0a-490f-8458-1e8280869c96 https://doi.org/10.1016/j.yqres.2004.08.001 http://hdl.handle.net/1871.1/96555d91-4e0a-490f-8458-1e8280869c96 http://www.scopus.com/inward/record.url?scp=8644230998&partnerID=8YFLogxK http://www.scopus.com/inward/citedby.url?scp=8644230998&partnerID=8YFLogxK |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Antarc* Antarctica Sea ice |
genre_facet |
Antarc* Antarctica Sea ice |
op_source |
Stuut , J B W & Lamy , F 2004 , ' Climate variability at the southern boundaries of the Namib (southwestern Africa) and Atacama (northern Chile) coastal deserts during the last 120,000 yr ' , Quaternary Research , vol. 62 , no. 3 , pp. 301-309 . https://doi.org/10.1016/j.yqres.2004.08.001 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.yqres.2004.08.001 |
container_title |
Quaternary Research |
container_volume |
62 |
container_issue |
3 |
container_start_page |
301 |
op_container_end_page |
309 |
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1766028857717030912 |