Collaborative Research: Completing an ultra-high resolution methane record from the WAIS Divide ice core

合作研究：完成 WAIS Divide 冰芯的超高分辨率甲烷记录

• 批准号: 1043500
• 负责人: Todd Sowers
• 金额: $ 23.8万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-03-01 至 2015-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1043500&HistoricalAwards=false
• 关键词: Collaborative; Research; Completing; ultra; resolution

1043500/SowersThis award supports a project to develop a 50 yr resolution methane data set that will play a pivotal role in developing the WAIS Divide timescale as well as providing a common stratigraphic framework for comparing climate records from Greenland and West Antarctica. Even higher resolution data are proposed for key intervals to assist in precisely defining the phasing of abrupt climate change between the hemispheres. Concurrent analysis of a suit of samples from both the WAIS Divide and GISP-2 cores throughout the last 110,000 years is also proposed, to establish the interpolar methan (CH4) gradient that will be used to identify geographic areas responsible for the climate related methane emission changes. The intellectual merit of the proposed work is that it will provide chronological control needed to examine the timing of changes in climate proxies, and critical chronological ties to the Greenland ice core records via methane variations. One main objective is to understand the interpolar timing of millennial-scale climate change. This is an important scientific goal relevant to understanding climate change mechanisms in general. The proposed work will help establish a chronological framework for addressing these issues. In addition, this proposal addresses the question of what methane sources were active during the ice age, through the work on the interpolar methane gradient. This work is directed at the fundamental question of what part of the biosphere controlled past methane variations, and is important for developing more sophisticated understanding of those variations. The broader impacts of the work are that the ultra-high resolution CH4 record will directly benefit all ice core paleoclimate research and the chronological refinements will impact paleoclimate studies that rely on ice core timescales for correlation purposes. The project will support both graduate and undergraduate students and the PIs will participate in outreach to the public.

1043500/Sowers 该奖项支持开发 50 年分辨率甲烷数据集的项目，该数据集将在开发 WAIS Divide 时间尺度以及提供用于比较格陵兰岛和西南极洲气候记录的通用地层框架方面发挥关键作用。为关键间隔提出了更高分辨率的数据，以帮助精确定义半球之间气候突变的阶段。还建议对过去 11 万年中 WAIS Divide 和 GISP-2 核心的一组样本进行同时分析，以建立极间甲烷 (CH4) 梯度，用于识别与气候相关的甲烷排放负责的地理区域变化。拟议工作的智力价值在于，它将提供检查气候代理变化时间所需的时间控制，以及通过甲烷变化与格陵兰冰芯记录的关键时间关系。一个主要目标是了解千年规模气候变化的极间时间。这是与理解一般气候变化机制相关的重要科学目标。拟议的工作将有助于建立一个按时间顺序排列的框架来解决这些问题。此外，该提案通过对极间甲烷梯度的研究，解决了冰河时期哪些甲烷源活跃的问题。这项工作针对生物圈的哪一部分控制过去的甲烷变化这一基本问题，对于更深入地理解这些变化非常重要。这项工作更广泛的影响是，超高分辨率 CH4 记录将直接有利于所有冰芯古气候研究，而时间顺序的细化将影响依赖冰芯时间尺度进行关联目的的古气候研究。该项目将为研究生和本科生提供支持，PI 将参与向公众的推广活动。