Quaternary Paleoclimatic Variations of Beringia: Large-scale Controls and Regional Responses

摘要ATM-9532074 Bartlein，帕特里克J.俄勒冈州大学标题：白令吉亚第四纪古气候变化：大尺度 控制和区域反应 北极的气候系统是全球系统的一个关键组成部分，因此，了解北极古气候变化的性质是预测该地区如何应对大规模气候控制变化的一个重要因素。 该PALE/ARCSS奖支持对白令海第四纪古生态记录的分析，以a）记录过去气候变化的性质和幅度，B）测试有关区域气候变化控制的假设，以及这些控制的变化如何在区域和地方层面上表达，c）利用这一地区日益增多的古环境记录，用于沿沿着关键断面考察古气候变化，并用于模型验证研究。 这一分析需要汇编该区域的现代气候和植被数据集，并利用这些数据建立植被与气候之间的关系。 这些关系可以应用于a）解释化石花粉数据在气候方面，从而说明了过去的气候变化的范围，B）测试特定的假设控制过去的气候变化通过比较“观察到的”记录的植被变化与暗示的假设，和c）验证气候模型模拟北极古气候。

Abstract ATM-9532074 Bartlein, Patrick J. University of Oregon Title: Quaternary Paleoclimatic Variations of Beringia: Large-scale Controls and Regional Responses The climate system of the Arctic is a key component of the global system, and an understanding of the nature of paleoclimatic variations in the Arctic is therefore an important element in predicting how that region may respond to changes in the large- scale controls of climate. This PALE/ARCSS award supports the analysis of Quaternary paleoecological records from Beringia to a) document the nature and magnitude of past climatic changes, b) test hypotheses about the controls of regional climatic variations, and how changes in those controls are expressed at the regional and local levels, and c) exploit the growing number of paleoenvirnomental records from this region for use in the examination of paleoclimatic variations along key transects and for application in model-validation studies. This analysis requires the compilation of modern sets of climate and vegetation data from the region, and their use to establish relationships between vegetation and climate. These relationships can then be applied to a) interpret fossil-pollen data in climate terms, thereby illustrating the range of past climate changes, b) test specific hypotheses about the controls of past climatic variations by comparing the "observed" record of vegetation change with that implied by the hypotheses, and c) validate climate model simulations of Arctic paleoclimates.