dc.contributor.author
Arens, Felix L.
dc.contributor.author
Feige, Jenny
dc.contributor.author
Airo, Alessandro
dc.contributor.author
Sager, Christof
dc.contributor.author
Hecht, Lutz
dc.contributor.author
Horstmann, Lucas
dc.contributor.author
Kaufmann, Felix E. D.
dc.contributor.author
Lachner, Johannes
dc.contributor.author
Neumann, Thomas
dc.contributor.author
Blanckenburg, Friedhelm von
dc.date.accessioned
2024-11-07T08:12:35Z
dc.date.available
2024-11-07T08:12:35Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/45582
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-45294
dc.description.abstract
The hyperarid Atacama Desert is one of the driest and oldest deserts on Earth, rendering it a valuable climate archive. However, unraveling its past climate is particularly challenging and the few studied paleoclimate records of the region reveal strong temporal and spatial variabilities. To enhance our understanding of these dynamics we investigated a sedimentary record in the Yungay valley located in the southern hyperarid Atacama Desert. We employed paleomagnetic and radiocarbon dating, and for the first time for Atacama Desert sediments, a meteoric 10Be/9Be based method for determining the depositional age. The respective 4.20 m deep profile comprises a lower alluvial fan deposit with a maximum age of 3.8 ± 0.8 Ma, and an upper 1.84 m thick clay pan deposit that has accumulated over the last 19 ka. Different proxies including grain size, salt concentration, and elemental composition indicate an aridity increase around 2.3 Ma ago and repeated dry and wet phases during the late Pleistocene and the Holocene. The latter climatic shifts can be assigned to variabilities of the South American Summer Monsoon and El Niño Southern Oscillation with moisture sources from the Atlantic and the Pacific Ocean, respectively. This study provides deeper insights into the heterogeneous climate of the hyperarid Atacama Desert and underlines the importance of interdisciplinary investigations to decipher climate systems and their effect on potential habitable regions in such an extreme environment.
en
dc.format.extent
17 Seiten
dc.rights.uri
https://creativecommons.org/licenses/by/4.0/
dc.subject
Hyperaridity
en
dc.subject
Sedimentology
en
dc.subject
Pedogenic processes
en
dc.subject
Paleoclimate
en
dc.subject
Atacama Desert
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::550 Geowissenschaften
dc.title
Climate variability in a 3.8 Ma old sedimentary record from the hyperarid Atacama Desert
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.articlenumber
104576
dcterms.bibliographicCitation.doi
10.1016/j.gloplacha.2024.104576
dcterms.bibliographicCitation.journaltitle
Global and Planetary Change
dcterms.bibliographicCitation.volume
242
dcterms.bibliographicCitation.url
https://doi.org/10.1016/j.gloplacha.2024.104576
refubium.affiliation
Geowissenschaften
refubium.affiliation.other
Institut für Geologische Wissenschaften / Fachrichtung Geochemie, Hydrogeologie, Mineralogie

refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.eissn
1872-6364
refubium.resourceType.provider
WoS-Alert