Origins of Particles in GISP2 Ice

9321910比斯开伊该奖项是对一个为期一年的项目的支持，该项目旨在将各种自然示踪技术应用于格陵兰冰盖项目2(GISP2)冰芯中不同浓度的尘埃，从较老的仙女座到北冰洋之前的时期，以及与海因里希事件H4和H3对应的体育场和间场期间沉积的不同尘埃浓度。提出了几种天然示踪剂，包括矿物学分析、铝硅酸盐(锶和钕)的同位素分析以及方解石和石膏(氧、硫和碳)等可溶矿物的同位素分析，以及花粉分析，以帮助确定这种物质的来源。对末次冰盛期(LGM)冰芯样品的初步工作显示出显著的矿物学差异，表明尘埃源区域在相隔约700年的低尘埃期和高尘埃期之间发生了南移。有了这些信息，净气团传输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. ***