Collaborative Research: the NEEM Deep Ice Core

该提案要求提供资金，以支持一组美国科学家参与北伊米安(NEEM)深冰芯项目，该项目旨在获取格陵兰岛北部的一个新冰芯。印缅是一项国际努力，由哥本哈根大学的冰川学小组领导。已有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的大约三分之一的物流成本。美国科学家将带头进行气体和气体同位素分析，并研究气体融入冰中的物理过程，他们将把现代气候放在过去两千年的背景下，他们将帮助提供在气候背景下进行所有分析所需的冰中基本温度记录。该项目的一个特别重点将是探索气候突变的高时间分辨率。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。最后一个分项目将侧重于固化过程，以了解气体在雪和冰中的平流和扩散，以及保护大气气体的冰泡的发展。

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.