Collaborative Research: The NEEM Deep Ice Core

该提案要求提供资金支持一组美国科学家参与北埃米亚 (NEEM) 深冰芯项目，该项目旨在获取格陵兰岛北部的新冰芯。 NEEM 是由哥本哈根大学冰川学小组领导的一项国际努力。十多个国家表达了参与的愿望。美国是 NEEM 的主要合作伙伴，已经提供了收集冰芯所需物流成本的约三分之一。 美国科学家将带头进行气体和气体同位素分析以及气体融入冰的物理研究，他们将把现代气候置于过去两千年的背景下，他们将帮助提供冰中的基本温度记录，以便将所有分析置于气候背景下。 该项目的一个特别重点是高时间分辨率，以探索气候突变。 最重要的分析将集中在气体浓度，特别是一氧化碳，以及氧、氢、氩、氪和碳的稳定同位素。 最后一个子项目将重点关注固化过程，以了解气体通过雪和冰的平流和扩散以及保存大气气体的冰泡的形成。

This proposal requests funds to support the participation of a group of US scientists in the North Eemian (NEEM) Deep Ice Core Project, a project designed to acquire a new ice core in northern Greenland. NEEM is an international effort, led by the glaciology group at the University of Copenhagen. More than a dozen countries have expressed a desire to participate. The US is a main partner in NEEM and is already providing about one-third of the logistics costs needed to collect the ice core. US scientists will take the lead on gas and gas isotope analyses and studies of the physics of gas incorporation into ice, they will place the modern climate in the context of the past two millennia, and they will help provide the basic temperature records in the ice needed to place all analyses in a climate context. A particular focus of the project will be on high temporal resolution to explore abrupt climate shifts. The most prominent analyses will focus on gas concentrations, in particular carbon monoxide, and stable isotopes of oxygen, hydrogen, argon, krypton, and carbon. A final subproject will focus on the firnification processes in order to understand the advection and diffusion of gases through the snow and ice and the development of ice bubbles that preserve the atmospheric gases.