Mutual Climatic Range Reconstructions of Late Quaternary Climates in Beringia

Elias, Scott Anderson， Katherine University of Colorado标题：白令陆桥晚第四纪气候的互气候范围重建本项目旨在利用互气候范围（Mutual Climate Range， MCR）方法综合和量化白令陆桥东部（阿拉斯加、育空地区）和白令陆桥的化石昆虫数据重建的古气候。第四纪昆虫化石记录为陆地生态系统提供了敏感、准确的古气候重建数据。与任何单一的替代数据来源一样，昆虫化石解释不能提供完整的古环境图景。本研究将通过生成校正的、定量的甲虫化石组合古温度数据来促进跨学科合作，这些数据将更容易与基于其他代理数据（如花粉响应面和传递函数）的解释重建相比较。这次调查的一个主要目的是确定晚更新世主要气候转变的性质、时间和强度。其次，将该方法应用于东白令陆桥地区，对现有数据进行校正，并提供季节温度重建。

Abstract ATM-9612641 Elias, Scott Anderson, Katherine University of Colorado Title: Mutual Climatic Range Reconstructions of Late Quaternary Climates in Beringia The aim of this grant is to synthesize and quantify paleoclimate reconstructions on the basis of fossil insect data from Eastern Beringia (Alaska, the Yukon Territory) and the Bering Land Bridge using the Mutual Climate Range (MCR) method. The Quaternary insect fossil record is a source of proxy data that provides sensitive, accurate paleoclimatic reconstructions for terrestrial ecosystems. As with any single source of proxy data, fossil insect interpretations cannot provide the complete paleoenvironmental picture. This investigation will promote interdisciplinary cooperation by generating calibrated, quantitative paleotemperature data for fossil beetle assemblages that will be more readily comparable to the reconstructions based on the interpretation of other proxy data, such as pollen response surfaces and transfer functions. A principal objective of this investigation will be to establish the nature, timing and intensity of the major climatic transitions of the late Pleistocene. Secondly, this method will be applied in Eastern Beringia to calibrate existing data and provide seasonal temperature reconstructions.