Multi-Proxy Lake Sediment Records from Northern Epirus and Greek Macedonia: Implications for Late Holocene Climate Variability and Land Use Change

该项目支持的研究，重建北方希腊和希腊马其顿的环境历史，从湖泊沉积物芯详细足以揭示十年和百年尺度的波动，在过去的水分供应约10,000年。将利用沉积物岩心的多替代分析，生成该区域全新世环境变化的第一个可靠的高分辨率加速器质谱14 C定年记录。保存在湖泊沉积物中的生物碳酸盐的氧同位素组成也将被测量，以重建降水和蒸发的变化，从这个项目的沉积学和古生态数据将被用来了解在地中海全新世气候转变的地方和区域范围。地中海和西亚的气候记录表明，干旱状况在距今4,200年前突然出现。来自希腊湖泊的数据将允许直接比较爱琴海的气候波动与其他高分辨率的地中海和西亚古气候档案，从而完善的空间和时间维度的突然气候变化events.Results从这项研究将有助于了解人为介导的环地中海环境变化。确定气候变异的自然范围以及这种变异受人类活动影响的程度，对于了解环境对未来人口的影响至关重要。该项目包括研究生和本科生的参与，将促进青年科学家的培训。该项目还通过与希腊的研究机构合作促进国际关系。

This project supports research to reconstruct the environmental history of northern Greece and Greek Macedonia from lacustrine sediment cores at detail sufficient to reveal decadal and centennial-scale fluctuations in moisture availability over the last ~10,000 years. Multi-proxy analyses of sediment cores will be used to generate the first reliable high-resolution accelerator mass spectrometry (AMS) 14C-dated record of Holocene environmental variability in the region. The oxygen isotopic composition of biogenic carbonate preserved in the lake sediments will also be measured in order to reconstruct precipitation and evaporation changes.Sedimentological and paleoecological data from this project will be used to understand the local and regional extent of Holocene climate transitions in the Mediterranean. Climate records in the Mediterranean and west Asia document the abrupt onset of arid conditions at 4,200 years before present. Data from Greek lakes will permit direct comparison of climate fluctuations in the Aegean with other high-resolution Mediterranean and west Asian paleoclimate archives, thereby refining the spatial and temporal dimension of the abrupt climate change events.Results from this study will contribute to the understanding of human-mediated environmental shifts of the circum-Mediterranean. Identification of the natural range of climate variability and the extent to which this variability is affected by human activities is critical to the understanding of environmental impacts on future populations. This project includes the participation of both graduate and undergraduate students and will promote the training of young scientists. The project also fosters international relations through collaboration with research faculty in Greece.