Glacial terrestrial climate in the southern high latitudes: The potential of the PASADO core from southern Patagonia

南半球西风带对冰期-间冰期和千年尺度大气CO2变化有重要影响。为了评估它们的重要性，需要在决定性的纬度上独立记录风的强度。巴塔哥尼亚南部拉古纳Potrok Aike（52°S）的PASADO岩心是南部高纬度地区独特的陆地档案。它提供了可能性来推断风强度的变化，通过重建同位素湖水平衡驱动的风诱导蒸发。对全新世样品的调查表明了这种方法的潜力。为了评估将这些分析扩展到最后一次冰期的可能性，包括南极变暖事件等关键间隔，我们建议调查一系列来自帕萨多冰芯冰川部分的初始样品。如果成功的话，这些分析将成为进一步调查的基础，在更高的时间分辨率。

The southern Hemisphere westerlies are suggested to have a pivotal influence on atmospheric CO2 changes on glacial-interglacial as well as millennial time-scales. In order to evaluate their significance independent records of wind-strength at decisive latitudes are needed. The PASADO drill-core from Laguna Potrok Aike (52°S) in southern Patagonia is a unique terrestrial archive at southern high latitudes. It provides the possibility to infer wind-intensity changes by reconstructing the isotopic lake-water balance driven by wind-induced evaporation. Investigations of samples covering the Holocene indicate the potential of this approach. In order to evaluate the possibility for extending these analyses into the last Glacial, covering critical intervals such as Antarctic warm events, we propose to investigate a series of initial samples from the glacial section of the PASADO core. If successful, these analyses will form the basis for further investigations in higher temporal resolution.