Completing the WAIS Divide Ice Core CO2 record

完成 WAIS Divide Ice Core CO2 记录

• 批准号: 1246465
• 负责人: Edward Brook
• 金额: $ 48万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-02-01 至 2016-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1246465&HistoricalAwards=false
• 关键词: Completing; WAIS; Divide; Ice; Core

Brook/1246465 This award supports a project to measure the carbon dioxide (CO2) concentration in the WAIS Divide ice core covering the time period 25,000 to 60,000 years before present, and to analyze the isotopic composition of CO2 in selected time intervals. The research will improve understanding of how and why atmospheric CO2 varied during the last ice age, focusing particularly on abrupt transitions in the concentration record that are associated with abrupt climate change. These events represents large perturbations to the global climate system and better information about the CO2 response should inform our understanding of carbon cycle-climate feedbacks and radiative forcing of climate. The research will also improve analytical methods in support of these goals, including completing development of sublimation methods to replace laborious mechanical crushing of ice to release air for analysis. The intellectual merit of the proposed work is that it will increase knowledge about the magnitude and timing of atmospheric CO2 variations during the last ice age, and their relationship to regional climate in Antarctica, global climate history, and the history of abrupt climate change in the Northern Hemisphere. The temporal resolution of the proposed record will in most intervals be ~ 4 x higher than previous data sets for this time period, and for selected intervals up to 8-10 times higher. Broader impacts of the proposed work include a significant addition to the amount of data documenting the history of the most important long-lived greenhouse gas in the atmosphere and more information about carbon cycle-climate feedbacks - important parameters for predicting future climate change. The project will contribute to training a postdoctoral researcher, research experience for an undergraduate and a high school student, and outreach to local middle school and other students. It will also improve the analytical infrastructure at OSU, which will be available for future projects.

布鲁克/1246465该奖项支持一个项目，以测量25,000至60,000年前WAIS分水岭冰芯中的二氧化碳（CO2）浓度，并分析选定时间间隔内CO2的同位素组成。 这项研究将提高对上一个冰河时期大气中二氧化碳变化的方式和原因的理解，特别关注与气候突变相关的浓度记录的突然转变。 这些事件代表了对全球气候系统的大扰动，有关CO2响应的更好信息应该为我们了解碳循环-气候反馈和气候辐射强迫提供信息。 该研究还将改进支持这些目标的分析方法，包括完成升华方法的开发，以取代费力的机械破碎冰以释放空气进行分析。拟议工作的智力价值是，它将增加有关最后一个冰河时期大气CO2变化的幅度和时间的知识，以及它们与南极洲区域气候、全球气候历史和北方半球气候突变历史的关系。 建议记录的时间分辨率在大多数间隔中将比该时间段的先前数据集高约4倍，并且对于选定的间隔高8-10倍。拟议工作的更广泛影响包括大量增加记录大气中最重要的长寿命温室气体历史的数据，以及更多关于碳循环-气候反馈-预测未来气候变化的重要参数的信息。 该项目将有助于培养一名博士后研究员，为一名本科生和一名高中生提供研究经验，并向当地中学和其他学生推广。 它还将改善俄勒冈州立大学的分析基础设施，可用于未来的项目。