DOI: 10.5194/cp-10-643-2014
Scopus记录号: 2-s2.0-84897423832
论文题名: Climate variability over the last 92 ka in SW Balkans from analysis of sediments from Lake Prespa
作者: Panagiotopoulos K. ; Böhm A. ; Leng M.J. ; Wagner B. ; Schäbitz F.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2014
卷: 10, 期: 2 起始页码: 643
结束页码: 660
语种: 英语
Scopus关键词: algal bloom
; climate variation
; electron spin resonance dating
; mountain region
; Northern Hemisphere
; paleoclimate
; palynology
; phytoplankton
; primary production
; radiocarbon dating
; sediment core
; tephrochronology
; transboundary cooperation
; Balkan
; Turkmenistan
英文摘要: The transboundary Lake Prespa (Albania/former Yugoslav Republic of Macedonia/Greece) has been recognized as a conservation priority wetland. The high biodiversity encountered in the catchment at present points to the refugial character of this mountainous region in the southwestern Balkans. A lake sediment core retrieved from a coring location in the northern part of the lake was investigated through sedimentological, geochemical, and palynological analyses. Based on tephrochronology, radiocarbon and electron spin resonance (ESR) dating, and cross correlation with other Northern Hemisphere records, the age model suggests that the basal part of core Co1215 reaches back to 92 ka cal BP. Here we present the responses of this mid-altitude site (849 m a.s.l.) to climate oscillations during this interval and assess its sensitivity to millennial-scale variability. Endogenic calcite precipitation occurred in marine isotope stages (MIS) 5 and 1 and is synchronous with periods of increased primary production (terrestrial and/or lacustrine). Periods of pronounced phytoplankton blooms (inferred from green algae and dinoflagellate concentrations) are recorded in MIS 5 and MIS 1 and suggest that the trophic state and lake levels underwent substantial fluctuations. Three major phases of vegetation development are distinguished: the forested phases of MIS 5 and MIS 1 dominated by deciduous trees with higher temperatures and moisture availability, the open landscapes of MIS 3 with significant presence of temperate trees, and the pine-dominated open landscapes of MIS 4 and MIS 2 with lower temperatures and moisture availability. Our findings suggest significant changes in forest cover and landscape openness, as well as in the properties of the vegetation belts (composition and distribution) over the period examined. The study area most likely formed the upper limit of several drought-sensitive trees (temperate tree refugium) at these latitudes in the Mediterranean mountains. © Author(s) 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49290
Appears in Collections: 气候变化与战略
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Recommended Citation:
Panagiotopoulos K.,Böhm A.,Leng M.J.,et al. Climate variability over the last 92 ka in SW Balkans from analysis of sediments from Lake Prespa[J]. Climate of the Past,2014-01-01,10(2)