Climatic fluctuations in the hyperarid core of the Atacama Desert during the past 215 ka

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Title:Main Title: Climatic fluctuations in the hyperarid core of the Atacama Desert during the past 215 ka
Description:Abstract: Paleoclimate records from the Atacama Desert are rare and mostly discontinuous, mainly recording runoff from the Precordillera to the east, rather than local precipitation. Until now, paleoclimate records have not been reported from the hyperarid core of the Atacama Desert (<2 mm/yr). Here we report the results from multi-disciplinary investigation of a 6.2 m drill core retrieved from an endorheic basin within the Coastal Cordillera. The record spans the last 215 ka and indicates that the long-term hyperarid climate in the Central Atacama witnessed small but significant changes in precipitation since the penultimate interglacial. Somewhat ‘wetter’ climate with enhanced erosion and transport of material into the investigated basin, commenced during interglacial times (MIS 7, MIS 5), whereas during glacial times (MIS 6, MIS 4–1) sediment transport into the catchment was reduced or even absent. Pelagic diatom assemblages even suggest the existence of ephemeral lakes in the basin. The reconstructed wetter phases are asynchronous with wet phases in the Altiplano but synchronous with increased seasurface temperatures off the coasts of Chile and Peru, i.e. resembling modern El Niño-like conditions.
Responsible Party
Creators:Benedikt Ritter (Author), Volker Wennrich (Author), Alicia Medialdea (Author), Dominik Brill (Author), Georgina King (Author), Sascha Schneiderwind (Author), Karin Niemann (Author), Emma Fernández-Galego (Author), Julia Diederich (Author), Christian Rolf (Author), Roberto Bao (Author), Martin Melles (Author), Tibor Dunai (Author)
Publisher:Nature Scientific Reports
Publication Year:2019
CRC1211 Topic:Climate
Related Subproject:A2
Subjects:Keywords: Geochronology, Quaternary Geology, Paleoclimate Proxies
File Details
Data Type:Text - Article
File Size:6.5 MB
Date:Available: 27.03.2019
Mime Type:application/pdf
Download Permission:Free
General Access and Use Conditions:According to the CRC1211DB data policy agreement.
Access Limitations:According to the CRC1211DB data policy agreement.
Specific Information - Publication
Publication Status:Accepted
Review Status:Peer reviewed
Publication Type:Article
Article Type:Electronic
Source:Nature Scientific Reports
Number of Pages:13 (1 - 13)
Metadata Details
Metadata Creator:Benedikt Ritter
Metadata Created:20.06.2019
Metadata Last Updated:20.06.2019
Funding Phase:1
Metadata Language:English
Metadata Version:V50
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