Accumulation Histories of GISP2 Ice During the Last Glacial Period: Record Based on In-Situ Produced 14 C

该研究奖旨在获得关于GISP 2冰芯积累历史的全面信息，使用基于积累过程中宇宙射线在积雪“氧气”中产生的原位14 C的核方法。这种方法是在对GISP 2岩心的记录良好的全新世研究中开发的，该岩心的年代学和累积速率受到相当好的限制。该方法允许在无法构建可靠的流动模型的情况下表征冰累积速率。支持者试图完成14 C分析的几个深冰样品的年龄16-39 ky BP在手，也冰样品积累在特殊的太阳活动时期。第一组数据将提供关于冰川期积累率的信息，而第二组数据将揭示不同太阳活动水平期间气候变化和宇宙射线通量的影响。

This research award seeks to obtain comprehensive information on the accumulation history of the GISP2 ice core, using a nuclear method based on in-situ 14C produced by cosmic rays in the firn "oxygen" during accumulation. This method was developed in a study of the well-documented Holocene of the GISP2 core, whose chronology and accumulation rates are fairly well constrained. This method allows characterization of ice accumulation rates in situations where reliable flow models cannot be constructed. The proponents seek to complete 14C analyses of several deep ice samples of ages 16-39 ky BP in hand, and also of ice samples which accumulated during special solar activity epochs. The first set of data would yield information on accumulation rates during the glacial period, while the second would shed light on the effects of changes in climate and cosmic ray fluxes during different solar activity levels.