Collaborative Research: Analysis of McCall Glacier ice core and related modern process studies

合作研究：麦考尔冰川冰芯分析及相关现代过程研究

• 批准号: 1023214
• 负责人: John Cassano
• 金额: $ 28.49万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-01 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1023214&HistoricalAwards=false
• 关键词: Collaborative; Research; Analysis; McCall; Glacier

This is a collaborative project involving four institutions. The proposed research addresses two major questions related to climate in the eastern Alaskan Arctic: 1) How has climate, terrestrial ecology, and pollutant transport changed over the past 250 years in this region, based on ice core reconstructions from McCall Glacier? and 2) How well can we overcome the challenges of core proxy interpretations from ice cores taken from small polythermal valley glaciers through modern-process studies? To answer these questions the investigators conduct an inter-disciplinary analysis of ice core proxies, atmospheric dynamics, modern processes, and numerical ice flow modeling. A 152-meter long core has already been drilled through McCall Glacier and analyzed for 35 chemical proxies. The proposed work will focus on 1) interpretation of these proxies, 2) analysis of pollen in the core, 3) process studies to identify sources of pollen to McCall Glacier, 4) tying the weather and climate record of the past 50 years to the upper section of the core, 5) continuing 3D flow modeling of the glacier and local weather observations, 6) conducting modern process investigations of the effects of seasonal melt on the generation of the core proxy record. The project will support two graduate students.

这是一个涉及四个机构的合作项目。拟议的研究解决了与阿拉斯加北极东部气候相关的两个主要问题：1）根据麦考尔冰川的冰芯重建，过去 250 年该地区的气候、陆地生态和污染物输送发生了怎样的变化？ 2）我们如何通过现代过程研究克服从小型多热谷冰川采集的冰芯进行核心代理解释的挑战？为了回答这些问题，研究人员对冰芯代理、大气动力学、现代过程和数值冰流模型进行了跨学科分析。麦考尔冰川上已钻出 152 米长的岩芯，并分析了 35 种化学代理物。拟议的工作将侧重于 1) 对这些代理的解释，2) 对核心花粉的分析，3) 确定麦考尔冰川花粉来源的过程研究，4) 将过去 50 年的天气和气候记录与核心的上部部分，5) 继续对冰川和当地天气观测进行 3D 流动建模，6) 对季节性融化对核心代理记录生成的影响进行现代过程调查。该项目将支持两名研究生。