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DOI10.1016/j.dsr2.2019.03.003
Holocene monsoon and sea level-related changes of sedimentation in the northeastern Arabian Sea
Burdanowitz, Nicole1; Gaye, Birgit1; Hilbig, Lea1; Lahajnar, Niko1; Lueckge, Andreas2; Rixen, Tim1,3; Emeis, Kay-Christian1,4
发表日期2019
ISSN0967-0645
EISSN1879-0100
卷号166页码:6-18
英文摘要

The Indian Monsoon and the westerlies strongly influence the sedimentation in the northeastern Arabian Sea by impacting rainfall and erosion on land and on biogeochemical processes in the ocean. To disentangle the terrestrial and oceanic processes, we analysed mineralogical and bulk geochemical components of a Holocene sediment core offshore Pakistan. Endmember modelling of grain sizes and principal component analyses (PCA) of major and trace elements identify the origin of sediments and their dominant mode of transport. Sedimentation processes during the early Holocene (10.8-8.2 ka BP) were influenced by the post-glacial sea level rise and orbitally forced strengthening of the Indian summer monsoon (ISM) and westerlies. This led to a shift from rather terrestrial-dominated towards a marine-dominated sedimentation, whereas the fluvial source shifted from the Makran rivers to the Hab River near Karachi. During the mid-Holocene (8.2-4.2 ka BP) a combination of weakening ISM and southward displacement of the ITCZ enhanced the influence of the westerlies, together decreasing river discharges and enhancing aeolian input (probably from the Sistan Basin region). This trend continued during the last ca. 4 ka when the increasing aridification of the Hab River catchment further increased the aeolian inputs. Solar and lunar driven short-term variations as well as Bond events known from the North Atlantic Ocean superpose these trends. They lead to a pronounced increase of fluvial inputs between 8.6-8.4 ka BP and at ca. 3 ka BP as well as to dry events around 4.2 ka and 1.2-1 ka BP. Our study highlights the increasing influence of the westerlies on the sedimentation processes in the northeastern Arabian Sea towards the late Holocene.


WOS研究方向Oceanography
来源期刊DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/90035
作者单位1.Univ Hamburg, Inst Geol, Bundesstr 55, D-20146 Hamburg, Germany;
2.Bundesanstalt Geowissensch & Rohstoffe, Stilleweg 2, D-30655 Hannover, Germany;
3.Leibniz Zentrum Marine Tropenforsch ZMT, Fahrenheitstr 6, D-28359 Bremen, Germany;
4.Helmholtz Ctr Geesthacht, Inst Coastal Res, Max Planck Str 1, D-21502 Geesthacht, Germany
推荐引用方式
GB/T 7714
Burdanowitz, Nicole,Gaye, Birgit,Hilbig, Lea,et al. Holocene monsoon and sea level-related changes of sedimentation in the northeastern Arabian Sea[J],2019,166:6-18.
APA Burdanowitz, Nicole.,Gaye, Birgit.,Hilbig, Lea.,Lahajnar, Niko.,Lueckge, Andreas.,...&Emeis, Kay-Christian.(2019).Holocene monsoon and sea level-related changes of sedimentation in the northeastern Arabian Sea.DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY,166,6-18.
MLA Burdanowitz, Nicole,et al."Holocene monsoon and sea level-related changes of sedimentation in the northeastern Arabian Sea".DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY 166(2019):6-18.
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