Origins of Particles in GISP2 Ice

该奖项是为了支持一个为期一年的项目，该项目将各种自然示踪技术应用于格陵兰冰盖项目2 （GISP2）冰芯中从老仙女木期到前寒带期的不同浓度的灰尘，以及与海因里希事件H4和H3对应的间冰期和间冰期沉积的不同浓度的灰尘。几种天然示踪剂，包括矿物学分析，铝硅酸盐（锶和钕）的同位素分析和可溶性矿物质，如方解石和石膏（氧，硫和碳），以及花粉分析，以帮助确定该材料的来源。末次盛冰期（LGM）冰芯样品的初步工作显示出显著的矿物学变化，表明在间隔约700年的低沙尘间期和高沙尘间期样品之间，沙尘源区域向南移动。有了这些信息，净气团输送路径可以用来帮助模拟大气古环流模式。* * *

9321910 Biscaye This award is for support for a one year project to apply a variety of natural tracer techniques to the varying concentrations of dust in the Greenland Ice Sheet Project Two (GISP2) ice core, during the period from the Older Dryas to the Pre-Boreal, and to the varying dust concentrations deposited during the stadials and interstadials which correspond to Heinrich Events H4 and H3. Several natural tracers including mineralogical analysis, isotopic analysis of aluminosilicates (Strontium, and Neodymium) and of soluble minerals such as calcite and gypsum (Oxygen, Sulfur and Carbon), and pollen analysis are proposed to help determine the origins of this material. Preliminary work on ice core samples from the last glacial maximum (LGM) have demonstrated significant mineralogical variation, indicating a southward shift in dust source area between samples from a lower-dust, interstadial period and a higher-dust, stadial period about 700 years apart. With this information, net airmass transport pathways can be used to aid in the modeling of atmospheric paleocirculation patterns. ***