DOI: 10.1016/j.quascirev.2018.03.029
Scopus记录号: 2-s2.0-85044538478
论文题名: Dead Sea pollen provides new insights into the paleoenvironment of the southern Levant during MIS 6–5
作者: Chen C. ; Litt T.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 188 起始页码: 15
结束页码: 27
语种: 英语
英文关键词: Early modern human migration
; Eastern Mediterranean
; Lake level
; Last interglacial
; Paleovegetation
Scopus关键词: Chloride minerals
; Fertilizers
; Glacial geology
; Landforms
; Moisture
; Sodium chloride
; Vegetation
; Eastern Mediterranean
; Human migration
; Lake levels
; Last interglacial
; Paleovegetation
; Lakes
; deciduous tree
; deep drilling
; desert
; dicotyledon
; grass
; interglacial
; lake level
; Last Glacial
; marine isotope stage
; migration
; paleobotany
; paleoclimate
; paleoenvironment
; pollen
; sediment analysis
; steppe
; warming
; Dead Sea
; Levant
; Mediterranean Region
; Mediterranean Sea
; Mediterranean Sea (East)
; Pistacia vera
; Quercus
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. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112209
Appears in Collections: 气候减缓与适应
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作者单位: School of Geographic Science, Nantong University, Tongjingdadao 999, Nantong, 226007, China; Steinmann Institute for Geology, Mineralogy, and Paleontology, University of Bonn, Nussallee 8, Bonn, 53115, Germany
Recommended Citation:
Chen C.,Litt T.. Dead Sea pollen provides new insights into the paleoenvironment of the southern Levant during MIS 6–5[J]. Quaternary Science Reviews,2018-01-01,188