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

南半球西风带在冰期-间冰期和千年时间尺度上对大气CO2变化有重要影响。为了评估它们的重要性，需要对决定性纬度的风力进行独立记录。巴塔哥尼亚南部拉古纳·波特罗克·艾克(52°S)的帕萨多岩心是南部高纬度地区独一无二的陆地档案。它提供了通过重建由风引起的蒸发驱动的同位素湖水平衡来推断风强度变化的可能性。对覆盖全新世的样品的调查表明，这种方法具有潜力。为了评估将这些分析扩展到最后一次冰川的可能性，包括南极温暖事件等关键间隔，我们建议调查帕萨多冰芯冰川部分的一系列初始样本。如果成功，这些分析将为更高时间分辨率的进一步研究奠定基础。

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.