COLLABORATIVE RESEARCH: Microparticle/tephra analysis of the WAIS Divide ice core

合作研究：WAIS Divide 冰芯的微粒/火山灰分析

• 批准号: 0636740
• 负责人: Karl Kreutz
• 金额: --
• 依托单位: University of Maine
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-07-01 至 2011-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0636740&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; Microparticle; tephra; analysis

Kreutz/0636740Dunbar/0636767This award supports a project to perform continuous microparticle concentration and size distribution measurements (using coulter counter and state-of-the-art laser detector methods), analysis of biologically relevant trace elements associated with microparticles (Fe, Zn, Co, Cd, Cu), and tephra measurements on the WAIS Divide ice core. This initial three-year project includes analysis of ice core spanning the instrumental (~1850-present) to mid- Holocene (~5000 years BP) period, with sample resolution ranging from subannual to decadal. The intellectual merit of the project is that it will help in establishing the relationships among climate, atmospheric aerosols from terrestrial and volcanic sources, ocean biogeochemistry, and greenhouse gases on several timescales which remain a fundamental problem in paleoclimatology. The atmospheric mineral dust plays an important but uncertain role in direct radiative forcing, and the microparticle datasets produced in this project will allow us to examine changes in South Pacific aerosol loading, atmospheric dynamics, and dust source area climate. The phasing of changes in aerosol properties within Antarctica, throughout the Southern Hemisphere, and globally is unclear, largely due to the limited number of annually dated records extending into the glacial period and the lack of atephra framework to correlate records. The broader impacts of the proposed research are an interdisciplinary approach to climate science problems, and will contribute to several WAIS Divide science themes as well as the broader paleoclimate and oceanographic communities. Because the research topics have a large and direct societal relevance, the project will form a centerpiece of various outreach efforts at UMaine and NMT including institution websites, public speaking, local K-12 school interaction, media interviews and news releases, and popular literature. At least one PhD student and one MS student will be directly supported by this project, including fieldwork, core processing, laboratory analysis, and data interpretation/publication. We expect that one graduate student per year will apply for a core handler/assistant driller position through the WAIS Divide Science Coordination Office, and that undergraduate student involvement will result in several Capstone experience projects (a UMaine graduation requirement). Data and ideas generated from the project will be integrated into undergraduate and graduate course curricula at both institutions.

Kreutz/0636740Dunbar/0636767This award supports a project to perform continuous microparticle concentration and size distribution measurements (using coulter counter and state-of-the-art laser detector methods), analysis of biologically relevant trace elements associated with microparticles (Fe, Zn, Co, Cd, Cu), and tephra measurements on the WAIS Divide ice core.这个最初的三年项目包括跨越仪器（约1850年）到中期（〜5000年BP）期的冰核分析，样品分辨率从次级到十年级。 该项目的智力优点是，它将有助于建立来自陆地和火山源，海洋生物地球化学和几个时间尺度温室气体的气候，大气气溶胶之间的关系，这仍然是古气候学的基本问题。 大气矿物灰尘在直接辐射强迫中起着重要但不确定的作用，并且该项目中产生的微粒数据集将使我们能够检查南太平洋气溶胶加载，大气动力学和尘埃区域气候的变化。整个南半球和全球范围内的南极洲气溶胶特性变化的相分化尚不清楚，这在很大程度上是由于延伸到冰川时期的每年过时的记录数量有限，并且缺乏与记录相关的Atephra框架。 拟议研究的更广泛的影响是一种跨学科的气候科学问题方法，并将为WAIS分裂科学主题以及更广泛的古气候和海洋学社区做出贡献。由于研究主题具有广泛而直接的社会意义，因此该项目将在Umaine和NMT中构成各种外展工作的核心，包括机构网站，公开演讲，本地K-12学校互动，媒体访谈和新闻发布以及流行文献。该项目将至少有一名博士生和一名MS学生得到该项目的直接支持，包括现场工作，核心处理，实验室分析和数据解释/出版物。我们预计，每年一名研究生将通过WAIS Divide科学协调办公室申请核心处理程序/助理钻机职位，并且本科生的参与将导致几个Capstone体验项目（Umaine毕业要求）。该项目产生的数据和想法将在两个机构的本科和研究生课程中集成。