Doctoral Dissertation Research: Reconstruction of Late Quaternary Paleoclimates of the Central Great Plains Using Magnetic and Nonmagnetic Parameters

William C. Johnson Kyeong Park U. Kansas，主校区博士论文研究：利用磁性和非磁性参数重建大平原中部晚第四纪古气候。该论文改进奖支持在内布拉斯加州中南部两个地点提取的岩石磁性分析、放射性碳定年和碳同位素分析。分析的目的是重建晚第四纪的气候和气候变化。在此期间，中部大平原经历了重大的气候和相关环境变化。该地区几乎没有高分辨率的气候替代记录，这在很大程度上反映了缺乏传统的信息来源（如用于植物微观和宏观化石分析的泥炭沼泽或天然湖泊）。另一种替代信息来源是该地区几乎连续的黄土和古土壤序列。这些将是在论文研究中要分析的材料的来源。结果将包括目前没有的高分辨率气候重建，更好的岩石磁测量参数化，以及单一气候记录中对比代理的组合。

SBR-9508272 William C. Johnson Kyeong Park U. Kansas, Main Campus Doctoral Dissertation Research: Reconstruction of Later Quaternary Paleoclimates of the Central Great Plains Using Magnetic and Non-Magnetic Parameters This dissertation-improvement award supports rock-magnetic analysis, radiocarbon dating, and carbon isotope analysis of materials extracted from two sites in south-central Nebraska. The purpose of the analysis is to reconstruct climate and climate change during the late Quaternary period. The central Great Plains has experienced major climatic and associated environmental change during this period. Little high-resolution climatic proxy record exists for the region, largely reflecting a lack of traditional information sources (such as peat bogs or natural lakes for botanical micro- and macro-fossil analysis). An alternative source of proxy information is available in the nearly continuous loess and paleosol sequences in the region. These will be the sources of the material to be analyzed in the dissertation research. The results will include a high-resolution climatic reconstruction where none currently exists, better parameterization of rock-magnetic measurements, and combination of contrasting proxies in a single climatic record.