Origins of Atmospheric Dust in WAISCORES (West Antarctic) Ice

这个奖项是为了在一年的时间里支持继续研究来自西南极洲simple Dome冰芯的大气尘埃样本。将从冰中提取粉尘，分析其矿物学和同位素（锶、钕、铅）成分，以确定它们的来源——它们来自哪个大陆地区，并通过大气输送到simple Dome。将沙尘与其大陆源区联系起来的主要方法是将其矿物学和同位素特征与来自南半球大陆地区的黄土和其他风成沉积物样品中的细粒颗粒进行比较。关于过去不同时期沙尘源区的资料为古大气环流和南极洲周围及向南极洲输送的模式提供了约束条件。

9615239 Biscaye This award is for one year of support to continue work on samples of atmospheric dusts from ice cores from Siple Dome, West Antarctica. The dusts will be extracted from the ice and analyzed for mineralogical and isotopic (strontium, neodymium, lead) compositions with a view to determining their provenance---the continental area(s) from which they were derived and transported through the atmosphere to Siple Dome. The principal means of relating the dusts to their continental source area(s) will be to compare their mineralogical and isotopic characteristics to the fine grained particles from samples of loess and other aeolian sediments from Southern Hemisphere continental areas. Information on the source areas of the dusts at various times in the past provides constraints on models of paleoatmospheric circulation and transport around and to Antarctica.