Bündelantrag PASADO-Support 3: Identification of eolian input at the Laguna Potrok Aike drill site, Patagonia

该项目是对关于南半球尘埃影响的讨论的一个重要贡献。对南极冰芯的详细调查导致了几份关于长途尘埃运输的出版物。对粉尘成分的指纹分析表明，南美洲南部(SSA)是主要的来源地区。沙尘可以与风系统的强度和方向有关，从而与古气候变化有关。SSA主要受南半球西风带(SHW)的影响，这些西风带在冰期和间冰期之间在纬度方向上移动，从而影响被动员的沙尘量。源区内的尘埃记录可以更好地了解SHW的迁移和相关的古气候变化。2008年在我们的研究区拉古纳波特罗克艾克进行了一次湖相深部钻探活动(PASADO)。这些岩心保存着过去约50ka的古气候记录。在海相岩心中，磁化率经常被用来追踪风成输入。然而，我们的岩心起源于一个巨大的火山田中的一个湖泊，携带磁化率的颗粒不仅来自风尘。在本研究范围内，将对湖相记录中风成物质的指纹进行表征，并有助于揭示近50ka以来的尘埃史。

This project is a key contribution to the discussion on the impact of dust in the southern hemisphere. Detailed investigations of the Antarctic ice cores have resulted in several publications that deal with long-distance dust transport. Fingerprint analyses of the dust components revealed Southern South America (SSA) as the major source area. Dust can be related to strength and direction of the wind systems and thus to paleoclimatic changes.SSA is mainly influenced by the Southern Hemisphere Westerlies (SHW) that shift in latitudinal direction between glacial and interglacial times, thus influencing the amount of dust that is mobilized. The dust record inside the source area allows to better understand the migration of the SHW and the associated paleoclimatic changes.A lacustrine deep drilling campaign (PASADO) was carried out in 2008 in Laguna Potrok Aike, our study area. The cores hold a paleoclimatic record of the past ~50 ka. Magnetic susceptibility was often used in marine cores to trace eolian input. Our cores, however, originate from a lake in a large volcanic field, and grains carrying magnetic susceptibility are not only of eolian origin. Within the scope of this study, the fingerprint of eolian material in the lacustrine record will be characterized and help to reveal the dust history of the past ~50 ka.