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DOI	10.1016/j.palaeo.2019.04.032
	Cyclonic activity over northeastern Africa at 8.5–6.7 cal kyr B.P.; based on lacustrine records in the Faiyum Oasis; Egypt
	Marks L.; Welc F.; Milecka K.; Zalat A.; Chen Z.; Majecka A.; Nitychoruk J.; Salem A.; Sun Q.; Szymanek M.; Gałecka I.; Tołoczko-Pasek A.
发表日期	2019
ISSN	0031-0182
起始页码	120
结束页码	132
卷号	528
英文摘要	During African Humid Period in the Holocene when the summer Intertropical Convergence Zone migrated to its northernmost position, the Qarun Lake in the Faiyum Oasis in Egypt was fed with regular inflows from the Nile River and rainfall brought by the Mediterranean winter circulation. Finely-laminated lake sediments, dated at 8.5–6.7 cal kyr B.P., were examined in terms of lithology, geochemistry, microfossils (diatom, pollen) and magnetic susceptibility. Based on the inferred geographical derivation of pollen, the environmental affiliation of diatom taxa and geochemistry of lake sediments, wind trajectories were distinguished, related to two main atmospheric circulation phases. During the earlier phase (8.50–7.83 cal kyr B.P.) there were northwestern wind trajectories followed by southern ones and during the later phase (7.83–6.70 cal kyr B.P.), the northern winds were followed by northwestern and southern ones. Northwestern and northern winds brought winter rainfall and caused water turbulence in the lake, and the southern winds were associated with regional aridification. This scenario of atmospheric circulation in northeastern Africa extends significantly our understanding of key modes of climatic variability and wind trajectories in the Early to Middle Holocene (Greenlandian to Northgrippian) transition. © 2019 Elsevier B.V.
英文关键词	Atmospheric circulation; Diatoms; Holocene; Intertropical Convergence Zone; Palaeowesterlies, pollen record
语种	英语
scopus关键词	aridification; atmospheric circulation; cyclone; diatom; geochemistry; Holocene; intertropical convergence zone; lacustrine deposit; pollen; rainfall; seasonal variation; westerly; Africa; Birket Qarun; Egypt; Faiyum [Egypt]; Nile River; Bacillariophyta
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150929
作者单位	University of Warsaw, Faculty of Geology, Warsaw, Poland; Cardinal Stefan Wyszyński University, Institute of Archaeology, Warsaw, Poland; Adam Mickiewicz University, Department of Biogeography and Paleoecology, Poznań, Poland; Tanta University, Faculty of Science, Tanta, Egypt; East China Normal University, State Key Laboratory of Estuarine and Coastal Research, Shanghai, 200062, China; John Paul 2nd State Higher School, Faculty of Economic and Technical Sciences, Biała Podlaska, Poland; Kafrelsheikh University, Faculty of Science, Kafrelsheikh, Egypt
推荐引用方式 GB/T 7714	Marks L.,Welc F.,Milecka K.,等. Cyclonic activity over northeastern Africa at 8.5–6.7 cal kyr B.P.; based on lacustrine records in the Faiyum Oasis; Egypt[J],2019,528.
APA	Marks L..,Welc F..,Milecka K..,Zalat A..,Chen Z..,...&Tołoczko-Pasek A..(2019).Cyclonic activity over northeastern Africa at 8.5–6.7 cal kyr B.P.; based on lacustrine records in the Faiyum Oasis; Egypt.Palaeogeography, Palaeoclimatology, Palaeoecology,528.
MLA	Marks L.,et al."Cyclonic activity over northeastern Africa at 8.5–6.7 cal kyr B.P.; based on lacustrine records in the Faiyum Oasis; Egypt".Palaeogeography, Palaeoclimatology, Palaeoecology 528(2019).