Late Pleistocene Continental Climate Reconstruction: Magnetic, Sedimentological, and Geochemical Proxies from Ice-Sheet-Margin Sediments

晚更新世大陆气候重建：来自冰盖边缘沉积物的磁学、沉积学和地球化学指标

• 批准号: 9526827
• 负责人: Subir Banerjee
• 金额: $ 12.52万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-03-15 至 1999-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9526827&HistoricalAwards=false
• 关键词: Late; Pleistocene; Continental; Climate; Reconstruction

Banerjee 9526827 Three loess regions in central Europe, central North America, and Alaska have been selected for a multi-proxy investigation with a strong magnetic component in a study for rapid and sensitive measurements of late Pleistocene climate change. Such a comparative, within-region and between-regions investigation is necessary for continental areas. We can then compare such data with the more numerous oceanic and ice-core records to test the validity of both the gradual and abrupt climate change history suggested for the last 130,000 years in the Northern Hemisphere. Preliminary magnetic studies of the periglacial loess profiles suggest that signatures of wind strength, source aridity, and in situ oxidation or reduction can be separated through the use of multiple magnetic proxies. Such proxies will then be validated by coulometric carbon, elemental analysis, grain-size measurements, and Mossbauer spectra.

Banerjee 9526827 在欧洲中部，北美中部和阿拉斯加的三个黄土地区已被选定为一个多代理调查与强磁成分的研究，以快速和灵敏的测量晚更新世气候变化。 这种区域内和区域间的比较调查对大陆地区是必要的。 然后，我们可以将这些数据与更多的海洋和冰芯记录进行比较，以检验北方半球过去13万年来气候变化历史的渐进性和突变性的有效性。 冰缘黄土剖面的初步磁性研究表明，风的强度，源干燥，并在原位氧化或还原的签名可以通过使用多个磁性代理分离。 这些替代物将通过库仑碳、元素分析、粒度测量和穆斯堡尔谱进行验证。