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

为了快速、灵敏地测量晚更新世气候变化，研究人员选择了中欧、北美中部和阿拉斯加的三个黄土地区进行多代理强磁调查。这种比较的、区域内的和区域间的调查对于大陆地区是必要的。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，以测试北半球在过去13万年中逐渐和突然的气候变化历史的有效性。对冰缘黄土剖面的初步磁学研究表明，通过使用多种磁学指标，可以分离出风强度、源干旱性和原位氧化或还原特征。然后，这些代理将通过库仑碳，元素分析，粒度测量和穆斯堡尔光谱进行验证。

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.