Chemical, isotopic, and mineralogical proxy data for aeolian input into the Lake Baikal system during the last 150 ka

该研究揭示了贝加尔湖碎屑组分的来源区域，并为评价北大西洋涛动和季风活动变化对碎屑输入机制的响应提供了新的数据。我们将重点关注最近150 ka内的突然冷事件（heinrich事件/间冰期）和温暖事件（间冰期）。为了重建贝加尔湖流域的风沙输入，我们解释了以下沉积物数据：(i) Sm-Nd同位素，（ii）大于2µm的粒度分数的粒度分布，（iii）长石、辉石、磷灰石、石榴石和锆石中微量元素的分布。这些结果将有助于更好地理解局地和区域大气环流，并为重建中亚地区不同气候模式的临界时间间隔的大气记录提供新的约束条件。贝加尔湖的数据追踪不断变化的大气型态和水流状况，应与中欧的气候记录进行比较。该项目是对正在进行的欧盟项目“大陆”的创新贡献。

The proposed study sheds light on the source areas of detrital components in Lake Baikal and provides new data for an evaluation of the detrital input mechanisms in response to changing North Atlantic Oscillations and monsoonal activities. We will focus on sudden cold events (Heinrich-events/stadials) and warm events (interstadials) during the last 150 ka. We interpret the following sediment data for reconstructing the aeolian input into the lake Baikal basin: (i) the Sm-Nd isotopes, (ii) the grain-size distribution of the size fraction greater than 2µm, and (iii) the distribution of trace elements in feldspar, pyroxene, apatite, garnet, and zircon. The results will contribute to a better understanding of the local and regional atmospheric circulation and provide new constraints for reconstructing the atmospheric records in Central Asia for critical time-intervals characterised by different climatic modes. The Baikal data, tracing changing atmospheric patterns and flow regimes, shall be compared with climatic records from Central Europe. This project is an innovative contribution to the ongoing EU project "CONTINENT".