Terrigenous sedimentation of sediment core GeoB6007-2


Variations in deposition of terrigenous fine sediments and their grain-size distributions from a high-resolution marine sediment record offshore northwest Africa (30°51.0'N; 10°16.1'W) document climate changes on the African continent during the Holocene. End-member grain-size distributions of the terrigenous silt fraction, which are related to fluvial and aeolian dust transport, indicate millennial-scale variability in the dominant transport processes at the investigation site off northwest Africa as well as recurring periods of dry conditions in northwest Africa during the Holocene. The terrigenous record from the subtropical North Atlantic reflects generally humid conditions before the Younger Dryas, during the early to mid-Holocene, as well as after 1.3 kyr BP. By contrast, continental runoff was reduced and arid conditions were prevalent at the beginning of the Younger Dryas and during the mid- and late Holocene. A comparison with high- and low-latitude Holocene climate records reveals a strong link between northwest African climate and Northern Hemisphere atmospheric circulation throughout the Holocene. Due to its proximal position, close to an ephemeral river system draining the Atlas Mountains as well as the adjacent Saharan desert, this detailed marine sediment record, which has a temporal resolution between 15 and 120 years, is ideally suited to enhance our understanding of ocean-continent-atmosphere interactions in African climates and the hydrological cycle of northern Africa after the last deglaciation.

Supplement to: Holz, Christine; Stuut, Jan-Berend W; Henrich, Rüdiger; Meggers, Helge (2007): Variability in terrigenous sedimentation processes off northwest Africa and its relation to climatic changes: inferrence from grain-size distributions of a Holocene marine sediment record. Sedimentary Geology, 202(3), 499-508

DOI https://doi.org/10.1594/PANGAEA.738416
Related Identifier IsSupplementTo https://doi.org/10.1016/j.sedgeo.2007.03.015
Related Identifier References https://nbn-resolving.org/urn:nbn:de:gbv:46-diss000012051
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.738416
Creator Holz, Christine; Stuut, Jan-Berend W ORCID logo; Henrich, Rüdiger; Meggers, Helge
Publisher PANGAEA
Publication Year 2007
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Resource Type Supplementary Publication Series of Datasets; Collection
Format application/zip
Size 3 datasets
Discipline Geosciences; Natural Sciences
Spatial Coverage (-10.268 LON, 30.850 LAT)