Arid
DOI10.1016/j.quascirev.2018.03.029
Dead Sea pollen provides new insights into the paleoenvironment of the southern Levant during MIS 6-5
Chen, Chunzhu1,2; Litt, Thomas2
通讯作者Chen, Chunzhu
来源期刊QUATERNARY SCIENCE REVIEWS
ISSN0277-3791
出版年2018
卷号188页码:15-27
英文摘要

The paleoclimate of the southern Levant, especially during the last interglacial (LIG), is still under debate. Reliable paleovegetation information for this period, as independent evidence to the paleoenvironment, was still missing. In this study, we present a high-resolution pollen record encompassing 147-89 ka from the Dead Sea deep drilling core 5017-1A. The sediment profile is marked by alternations of laminated marl deposits and thick massive halite, indicating lake-level fluctuations. The pollen record suggests that steppe and desert components predominated in the Dead Sea surroundings during the whole investigated interval. The late penultimate glacial (147.3-130.9 ka) and early last glacial (115.5-89.1 ka) were cool and relatively dry, with sub-humid conditions confined to the mountains that sustained moderate amounts of deciduous oaks. Prior to the LIG optimum, a prevalence of desert components and a concomitant increase in frost-sensitive pistachio trees demonstrate the occurrence of an arid initial warming phase (130.9-124.2 ka). The LIG optimum (124.2 ka-115.5 ka) was initiated by an abrupt grass expansion that was followed by a rapid spread of woodlands in the mountains due to increased moisture availability. The remarkable sclerophyllous expansion points to a strong seasonal moisture deficit. These results contradict previous Dead Sea lake-level investigations that suggested pluvial glacials and a warm, dry LIG in the southern Levant. Prominent discrepancies between vegetation and Dead Sea lake stands are also registered at 128-115 ka, and the potential causes are discussed. In particular, while the pollen spectra mirror increased effective moisture during the LIG optimum, the massive halite deposition is indicative of an extremely low lake level. Given that the climate amelioration triggered the migration of early modern humans to the southern Levant, we speculate that the diverse ecosystems in the region provided great potential for their residence. Across the eastern Mediterranean region, an analogous vegetation succession pattern is observed. (C) 2018 Elsevier Ltd. All rights reserved.


英文关键词Last interglacial Paleovegetation Lake level Early modern human migration Eastern Mediterranean
类型Article
语种英语
国家Peoples R China ; Germany
收录类别SCI-E ; SSCI
WOS记录号WOS:000432770600002
WOS关键词LAST GLACIAL PERIOD ; EARLY-MODERN HUMANS ; NEAR-EAST ; ENVIRONMENTAL-CHANGES ; MEDITERRANEAN REGION ; CLIMATE VARIABILITY ; TENAGHI PHILIPPON ; HUMAN OCCUPATION ; ABRUPT CLIMATE ; MIDDLE-EAST
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向Physical Geography ; Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/212510
作者单位1.Nantong Univ, Sch Geog Sci, Tongjingdadao 999, Nantong 226007, Peoples R China;
2.Univ Bonn, Steinmann Inst Geol Mineral & Paleontol, Nussallee 8, D-53115 Bonn, Germany
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GB/T 7714
Chen, Chunzhu,Litt, Thomas. Dead Sea pollen provides new insights into the paleoenvironment of the southern Levant during MIS 6-5[J],2018,188:15-27.
APA Chen, Chunzhu,&Litt, Thomas.(2018).Dead Sea pollen provides new insights into the paleoenvironment of the southern Levant during MIS 6-5.QUATERNARY SCIENCE REVIEWS,188,15-27.
MLA Chen, Chunzhu,et al."Dead Sea pollen provides new insights into the paleoenvironment of the southern Levant during MIS 6-5".QUATERNARY SCIENCE REVIEWS 188(2018):15-27.
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