Ethane measurements in Greenland ice cores: Developing a preindustrial record

格陵兰冰芯中的乙烷测量：建立前工业化记录

• 批准号: 1204248
• 负责人: Murat Aydin
• 金额: $ 29.79万
• 依托单位: University of California-Irvine
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-08-15 至 2015-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1204248&HistoricalAwards=false
• 关键词: Ethane; measurements; Greenland; ice; cores

Ethane is one of the most abundant hydrocarbon gases in the atmosphere with emissions from production and use of fossil fuels, from biomass burning, and from a variety of geologic sources. All ethane sources also emit methane, the second most important greenhouse gas in the atmosphere. However, ethane does not share the biological source of methane, making it a useful proxy for specific methane sources.This project will analyze of paleo-atmospheric ethane (C2H6), using a wet-extraction technique that has been used to measure ethane in Antarctic ice cores, using ice core samples from Summit, Greenland and producing the first northern hemisphere ethane record. The results will enable answers to questions about the importance of geological emissions of methane to the preindustrial atmosphere, and about the timing and magnitude of changes in biomass burning emissions during the late Holocene. In conjunction with measurements on Antarctic ice cores, the data from this project will help establish the north-south interhemispheric gradient of ethane in the preindustrial atmosphere.This project includes support for a PhD student and undergraduate researchers in the Department of Earth System Science at the University of California, Irvine. The results will contribute to a PhD dissertation and senior theses of senior undergraduate students. This project will also create summer research opportunities for undergraduates from non- research active universities through the REU site program in Biogeochemistry and Climate Change. The PI and the co-PI will participate in on- and off-campus activities directed towards educating high-school science teachers about climate change and its impacts, including a presentation at the 2011 regional meeting of the National Science Teachers Association. The results of this work will be disseminated via peer-review publications and will contribute to policy-relevant activities such as the IPCC Climate Assessment. Data resulting from this project will be archived in a national data repository.

乙烷是大气中最丰富的碳氢化合物气体之一，其排放来自化石燃料的生产和使用、生物质燃烧以及各种地质来源。所有乙烷来源也会排放甲烷，这是大气中第二大温室气体。然而，乙烷与甲烷的生物来源不同，这使其成为特定甲烷来源的有用替代物，本项目将利用格陵兰萨米特冰芯样品，采用曾用于测量南极冰芯中乙烷的湿提取技术，分析古大气乙烷（C2H6），并产生第一个北方乙烷记录。研究结果将有助于解答有关甲烷地质排放对工业化前大气的重要性以及全新世晚期生物质燃烧排放变化的时间和幅度的问题。结合对南极冰芯的测量，该项目的数据将有助于确定工业化前大气中乙烷的南北半球梯度，该项目包括支助欧文市加州大学地球系统科学系的一名博士生和本科生研究人员。研究结果将贡献于博士论文和高年级本科生的毕业论文。该项目还将通过REU生物地球化学和气候变化现场计划为非研究型大学的本科生创造夏季研究机会。主要研究者和共同主要研究者将参加校内和校外活动，以教育高中科学教师了解气候变化及其影响，包括在2011年全国科学教师协会区域会议上发言。这项工作的结果将通过同行审查出版物传播，并将有助于与政策有关的活动，如气专委的气候评估。该项目产生的数据将在国家数据储存库中存档。