Arid
DOI10.1016/j.sedgeo.2007.03.015
Variability in terrigenous sedimentation processes off northwest Africa and its relation to climate changes: Inferences from grain-size distributions of a Holocene marine sediment record
Holz, Christine; Stuut, Jan-Berend W.; Henrich, Rudiger; Meggers, Helge
通讯作者Holz, Christine
来源期刊SEDIMENTARY GEOLOGY
ISSN0037-0738
出版年2007
卷号202期号:3页码:499-508
英文摘要

Variations in deposition of terrigerrous fine sediments and their grain-size distributions from a high-resolution marine sediment record offshore northwest Africa (30 degrees 51.0’N; 10 degrees 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 and 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. (c) 2007 Elsevier B.V. All rights reserved.


英文关键词aeolian dust climate end-member model grain size Holocene northwest Africa
类型Article ; Proceedings Paper
语种英语
国家Germany
收录类别CPCI-S ; SCI-E
WOS记录号WOS:000251825700014
WOS关键词LAST GLACIAL MAXIMUM ; LATE QUATERNARY ; HUMID PERIOD ; ATLANTIC ; DUST ; SEA ; SAHARA ; WIND ; CIRCULATION ; INSOLATION
WOS类目Geology
WOS研究方向Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/155984
作者单位Univ Bremen, Dept Geosci, D-28334 Bremen, Germany
推荐引用方式
GB/T 7714
Holz, Christine,Stuut, Jan-Berend W.,Henrich, Rudiger,et al. Variability in terrigenous sedimentation processes off northwest Africa and its relation to climate changes: Inferences from grain-size distributions of a Holocene marine sediment record[J],2007,202(3):499-508.
APA Holz, Christine,Stuut, Jan-Berend W.,Henrich, Rudiger,&Meggers, Helge.(2007).Variability in terrigenous sedimentation processes off northwest Africa and its relation to climate changes: Inferences from grain-size distributions of a Holocene marine sediment record.SEDIMENTARY GEOLOGY,202(3),499-508.
MLA Holz, Christine,et al."Variability in terrigenous sedimentation processes off northwest Africa and its relation to climate changes: Inferences from grain-size distributions of a Holocene marine sediment record".SEDIMENTARY GEOLOGY 202.3(2007):499-508.
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