DOI: 10.1016/j.palaeo.2015.06.015
论文题名: Vegetation and environmental changes during the last interglacial in eastern Anatolia (Turkey): A new high-resolution pollen record from Lake Van
作者: Pickarski N. ; Kwiecien O. ; Djamali M. ; Litt T.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2015
卷: 435 起始页码: 145
结束页码: 158
语种: 英语
英文关键词: Intra-interglacial climate variability
; Lake Van
; Last interglacial
; Pollen
; Stable oxygen isotope
; XRF
英文摘要: A high-resolution multi-proxy record from Lake Van, eastern Anatolia, derived from a lacustrine sequence cored at the 357m deep Ahlat Ridge (AR), allows a comprehensive view of paleoclimate and environmental history in the continental Near East during the last interglacial (LI). We combined paleovegetation (pollen), stable oxygen isotope (δ18Obulk ) and XRF data from the same sedimentary sequence, showing distinct variations during the period from 135 to 110ka ago leading into and out of full interglacial conditions. The last interglacial plateau, as defined by the presence of thermophilous steppe-forest communities, lasted ca. 13.5ka, from ~129.1-115.6ka BP.The detailed palynological sequence at Lake Van documents a vegetation succession with several climatic phases: (I) the Pistacia zone (ca. 131.2-129.1. ka BP) indicates summer dryness and mild winter conditions during the initial warming, (II) the Quercus-. Ulmus zone (ca. 129.1-127.2. ka BP) occurred during warm and humid climate conditions with enhanced evaporation, (III) the Carpinus zone (ca. 127.2-124.1. ka BP) suggest increasingly cooler and wetter conditions, and (IV) the expansion of Pinus at ~. 124.1. ka BP marks the onset of a colder/drier environment that extended into the interval of global ice growth. Pollen data suggest migration of thermophilous trees from refugial areas at the beginning of the last interglacial. Analogous to the current interglacial, the migration documents a time lag between the onset of climatic amelioration and the establishment of an oak steppe-forest, spanning 2.1. ka. Hence, the major difference between the last interglacial compared to the current interglacial (Holocene) is the abundance of Pinus as well as the decrease of deciduous broad-leaved trees, indicating higher continentality during the last interglacial. Finally, our results demonstrate intra-interglacial variability in the low mid-latitudes and suggest a close connection with the high-frequency climate variability recorded in Greenland ice cores. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68856
Appears in Collections: 过去全球变化的重建
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作者单位: University of Bonn, Steinmann Institute for Geology, Mineralogy and Paleontology, Nussallee 8, Bonn, Germany; Ruhr-University Bochum, Institute for Geology, Mineralogy and Geophysics, Universitätsstrasse 150, Bochum, Germany; Institut Méditerranéen de Biodiversite et d'Ecologie marine et continentale (IMBE), UMR CNRS 7263/IRD 237, Aix-Marseille Université, Technopôle de l'Environnement Arbois-Méditerranée, BP 80, Aix-en-Provence cedex 04, France
Recommended Citation:
Pickarski N.,Kwiecien O.,Djamali M.,et al. Vegetation and environmental changes during the last interglacial in eastern Anatolia (Turkey): A new high-resolution pollen record from Lake Van[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2015-01-01,435