DOI: 10.1016/j.quascirev.2014.01.023
Scopus记录号: 2-s2.0-84896266836
论文题名: Regional vegetation patterns at lake Son Kul reveal Holocene climatic variability in central Tien Shan (Kyrgyzstan, Central Asia)
作者: Mathis M. ; Sorrel P. ; Klotz S. ; Huang X. ; Oberhänsli H.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 89 起始页码: 169
结束页码: 185
语种: 英语
英文关键词: Climatic change
; Holocene
; Palynofacies
; Pollen analyses
; Vegetation dynamics
; Western central Asia (Tien Shan)
Scopus关键词: Climate change
; Dynamics
; Lakes
; Magnetic susceptibility
; Central Asia
; Climatic changes
; Holocenes
; Palynofacies
; Pollen analysis
; Vegetation dynamics
; Vegetation
; atmospheric circulation
; climate change
; Holocene
; magnetic susceptibility
; meadow
; moisture content
; palynology
; seasonality
; vegetation history
; China
; Tien Shan
; Xinjiang Uygur
英文摘要: A multiproxy study was conducted on Holocene sediments from the alpine lake Son Kul (3010ma.s.l, 41°48'33N/75°07'38E) in central Tien Shan (Kyrgyzstan). The combination of high-resolution pollen, palynofacies and magnetic susceptibility data allowed reconstruction of changes in sedimentary and vegetation dynamics regionally at Son Kul between 8350 and ca2000cal. BP. Using pollen data to quantify climatic parameters, a quantitative reconstruction of climatic conditions was performed using the "Modern Analogue Vegetation types" (MAV) method and a ranged index of seasonality. The most temperate (e.g. moister) climate conditions occurred between 8350 and 5000-4500cal. BP when alpine meadow vegetation was enriched in plants requiring moister conditions and trees developed regionally. Conversely, more continental and arid conditions prevailed after 4500cal. BP with the decline of arboreal vegetation (especially Juniperus) and the extension of an alpine steppe-meadow along with a regional decrease in Poaceae. This climate transition was associated with a change in seasonality as the continentality greatly intensified after 5000-4500cal. BP. Our results are consistent with other records from the Tien Shan range and the Chinese Province Xinjiang showing that relatively wet conditions prevailed regionally before 5000cal. BP, whereas reduced moisture conditions were established after that time. From a more global perspective, we highlight that regional rainfall in central Tien Shan and western Central Asia is likely to be predominantly controlled by the Eastern Mediterranean cyclonic system and North Atlantic climate, as based on the close correspondence between climatic archives from western Central Asia, the Levant, the Eastern Mediterranean and Caspian Sea regions. However, the effect of monsoonal dynamics on the regional climatic system in central Tien Shan still remains dubious, since recent modelling studies have shown that no dynamic link exists between humidity in Central Asia and the Indian Summer Monsoon. This study pinpoints the need to explore the effect of remote Eurasian atmospheric circulation patterns on past climate variability in Central Asia. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60353
Appears in Collections: 过去全球变化的重建
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作者单位: Laboratoire de Géologie de Lyon (UMR 5276), Université Claude Bernard-Lyon 1, Villeurbanne, France; Fachbereich Geowissenschaften, Universität Tübingen, Rümelinstrasse 19-23, 72070 Tübingen, Germany; State Key Laboratory of Marine Geology, Tongji University, 200092 Shanghai, China; Helmholtz-Centre Potsdam, German Geoscience Research Centre (GFZ), Section 5.2, Telegraphenberg, D-14473 Potsdam, Germany; Museum für Naturkunde, Leibnitz-Institute Berlin (Mineralogy), Invalidenstrasse 43, 10115 Berlin, Germany
Recommended Citation:
Mathis M.,Sorrel P.,Klotz S.,et al. Regional vegetation patterns at lake Son Kul reveal Holocene climatic variability in central Tien Shan (Kyrgyzstan, Central Asia)[J]. Quaternary Science Reviews,2014-01-01,89