Collaborative Research: Constructing an Ultra-high Resolution Atmospheric Methane Record for the Last 140,000 Years from WAIS Divide Core.

合作研究：利用 WAIS Divide Core 构建过去 14 万年的超高分辨率大气甲烷记录。

• 批准号: 0538538
• 负责人: Todd Sowers
• 金额: --
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-09-01 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0538538&HistoricalAwards=false
• 关键词: Collaborative; Research; Constructing; Ultra; Resolution

Sowers0538538This award supports a project to develop a high-resolution (every 50 yr) methane data set that will play a pivotal role in developing the timescale for the new deep ice core being drilled at the West Antarctic Ice Sheet Divide (WAIS Divde) site as well as providing a common stratigraphic framework for comparing climate records from Greenland and WAIS Divide. Certain key intervals will be measured at even higher resolution to assist in precisely defining the phasing of abrupt climate change between the northern and southern hemispheres. Concurrent analysis of a suit of samples from both the WAIS Divide and GISP2 ice cores throughout the last 110kyr is also proposed, to establish the inter-hemispheric methane gradient which will be used to identify geographic areas responsible for the climate-related methane emission changes. A large gas measurement inter-calibration of numerous laboratories, utilizing both compressed air cylinders and WAIS Divide ice core samples, will also be performed. The intellectual merit of the proposed work is that it will provide the 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. In addition, the project addresses the question of what methane sources were active during the ice age and will help to answer the fundamental question of what part of the biosphere controlled past methane variations. The broader impact of the proposed work is that it will directly benefit all ice core paleoclimate research and will impact the paleoclimate studies that rely on ice core timescales for correlation purposes. The project will also support a Ph.D. student at Oregon State University who will have the opportunity to be involved in a major new ice coring effort with international elements. Undergraduates at Penn State will gain valuable laboratory experience and participate fully in the project. The proposed work will underpin the WAIS Divide chronology, which will be fundamental to all graduate student projects that involve the core. The international inter-calibration effort will strengthen ties between research institutions on four continents and will be conducted as part of the International Polar Year research agenda.

Sowers0538538该奖项支持一个开发高分辨率（每50年一次）甲烷数据集的项目，该数据集将在开发西南极冰盖分水岭（WAIS Divde）站点正在钻探的新深冰芯的时间尺度方面发挥关键作用，并为比较格陵兰岛和WAIS Divide的气候记录提供共同的地层框架。将以更高的分辨率测量某些关键间隔，以协助精确确定北方和南半球之间气候突变的阶段。同时分析了一套样品从两个WAIS分水岭和GISP2冰芯在过去的110kyr也提出了，以建立半球间的甲烷梯度，这将被用来确定地理区域负责与气候相关的甲烷排放变化。还将利用压缩空气瓶和WAIS Divide冰芯样品对许多实验室进行大规模的气体测量相互校准。 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。此外，该项目还解决了在冰河时期活跃的甲烷来源的问题，并将有助于回答生物圈的哪一部分控制过去甲烷变化的基本问题。 拟议工作的更广泛影响是，它将直接有利于所有冰芯古气候研究，并将影响依赖冰芯时间尺度进行相关性研究的古气候研究。该项目还将支持一个博士学位。他是俄勒冈州州立大学的一名学生，将有机会参与一项具有国际元素的重大新的冰核取芯工作。宾夕法尼亚州立大学的本科生将获得宝贵的实验室经验，并充分参与该项目。拟议的工作将支持WAIS鸿沟年表，这将是所有涉及核心的研究生项目的基础。国际相互校准工作将加强四大洲研究机构之间的联系，并将作为国际极地年研究议程的一部分进行。