Origins of Particles in GISP2 Ice

GISP2 冰中粒子的起源

• 批准号: 9321910
• 负责人: Pierre Biscaye
• 金额: $ 6.5万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-05-01 至 1996-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9321910&HistoricalAwards=false
• 关键词: Origins; Particles; GISP2; Ice

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. ***

9321910 Biscaye该奖项用于支持一个为期一年的项目，将各种天然示踪剂技术应用于格陵兰冰盖项目二（GISP2）冰芯中的不同灰尘浓度，从旧仙女木到前北方时期，以及对应于海因里希事件H4和H3的stadial和interstadial期间沉积的不同灰尘浓度。 几种天然示踪剂，包括矿物学分析，铝硅酸盐（锶和钕）和可溶性矿物，如方解石和石膏（氧，硫和碳）的同位素分析，以及花粉分析，建议帮助确定这种材料的起源。 对末次盛冰期（LGM）冰芯样品的初步研究表明，矿物学上存在显著的变化，表明尘埃源区在低尘、间冰期和高尘、间冰期样品之间有一个向南的位移，两者相距约700年。 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。 ***