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

Banerjee 9526827欧洲中部、北美中部和阿拉斯加的三个黄土地区被选为一项具有强磁成分的多代理调查，以快速和灵敏地测量晚更新世气候变化。对于大陆地区来说，这种比较、区域内和区域间的调查是必要的。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，以测试北半球过去13万年来渐进和突然气候变化历史的有效性。对冰缘黄土剖面的初步磁性研究表明，通过使用多个磁性替代物，可以分离出风强度、来源干旱和原位氧化或还原的特征。这样的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。

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.