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

这一研究奖项旨在利用一种基于积聚过程中宇宙射线在积聚过程中产生的原位14C的核方法，获得关于GISP2冰芯积聚历史的全面信息。这种方法是在对GISP2岩芯全新世的研究中发展起来的，该岩芯的年代学和堆积速率受到了相当好的约束。这种方法允许在无法建立可靠的流动模型的情况下表征冰的累积速率。支持者试图完成手头几个年龄为16-39Ky BP的深层冰样的14C分析，以及在特殊太阳活动时期积累的冰样的14C分析。第一组数据将提供有关冰川时期累积速率的信息，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.