Universität zu Köln

Ritter, Benedikt, Wennrich, Volker ORCID: 0000-0003-3617-1963, Medialdea, Alicia ORCID: 0000-0001-5895-0736, Brill, Dominik ORCID: 0000-0001-8637-4641, King, Georgina, Schneiderwind, Sascha, Niemann, Karin, Fernandez-Galego, Emma, Diederich, Julia, Rolf, Christian ORCID: 0000-0002-1459-6664, Bao, Roberto ORCID: 0000-0002-2928-2836, Melles, Martin and Dunai, Tibor J. (2019). Climatic fluctuations in the hyperarid core of the Atacama Desert during the past 215 ka. Sci Rep, 9. LONDON: NATURE PUBLISHING GROUP. ISSN 2045-2322

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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 sea-surface temperatures off the coasts of Chile and Peru, i.e. resembling modern El Nino-like conditions.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Ritter, Benedikt UNSPECIFIED UNSPECIFIED UNSPECIFIED Wennrich, Volker UNSPECIFIED orcid.org/0000-0003-3617-1963 UNSPECIFIED Medialdea, Alicia UNSPECIFIED orcid.org/0000-0001-5895-0736 UNSPECIFIED Brill, Dominik UNSPECIFIED orcid.org/0000-0001-8637-4641 UNSPECIFIED King, Georgina UNSPECIFIED UNSPECIFIED UNSPECIFIED Schneiderwind, Sascha UNSPECIFIED UNSPECIFIED UNSPECIFIED Niemann, Karin UNSPECIFIED UNSPECIFIED UNSPECIFIED Fernandez-Galego, Emma UNSPECIFIED UNSPECIFIED UNSPECIFIED Diederich, Julia UNSPECIFIED UNSPECIFIED UNSPECIFIED Rolf, Christian UNSPECIFIED orcid.org/0000-0002-1459-6664 UNSPECIFIED Bao, Roberto UNSPECIFIED orcid.org/0000-0002-2928-2836 UNSPECIFIED Melles, Martin UNSPECIFIED UNSPECIFIED UNSPECIFIED Dunai, Tibor J. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-153366
DOI:	10.1038/s41598-019-41743-8
Journal or Publication Title:	Sci Rep
Volume:	9
Date:	2019
Publisher:	NATURE PUBLISHING GROUP
Place of Publication:	LONDON
ISSN:	2045-2322
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language NORTHERN CHILE; HYDROLOGIC VARIATION; ICELAND BASIN; MIOCENE AGE; VARIABILITY; PACIFIC; PRECIPITATION; LANDSCAPE; RECORD; LAKE Multiple languages Multidisciplinary Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/15336