CAREER: Isotopic Studies of the Sources and Sinks of Atmospheric Carbon Monoxide

职业：大气一氧化碳源和汇的同位素研究

• 批准号: 9733638
• 负责人: John Mak
• 金额: $ 28.04万
• 依托单位: SUNY at Stony Brook
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-06-01 至 2003-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9733638&HistoricalAwards=false
• 关键词: CAREER; Isotopic; Studies; Sources; Sinks

9733638Mak This project was submitted in response to the CAREER Program solicitation. It is a four-year career development plan that integrates research and teaching goals. The major science objectives focus on the importance of atmospheric CO in tropospheric chemical processes for the background marine atmosphere. Specifically, the PI will use isotopic chemical information (i.e., 14CO, 13CO, C18O): 1) to quantify the rate of CO loss in the tropics (where OH concentrations are high); and 2) to characterize the relative temporal trend in source strengths for atmospheric CO. The loss rate of CO through reaction with OH will be determined by measuring 14CO. The stable isotope composition (13CO and C18O) will be used to help constrain temporal trends in the relative source strengths of atmospheric CO. Weekly air samples will be collected over a three-year period at the Mauna Loa Observatory and will be analyzed for the three CO isotopomers and for CO atmospheric abundance. Over the same sampling period the 14CO annual production rate in the lower troposphere will be measured and these data will be compared to model simulations obtained from the NASA Goddard 3-D Global Chemistry Transport Model. These proposed activities will shed new information on the source strengths of atmospheric CO, particularly over the tropical Pacific Ocean. The education plan uses the proposed atmospheric CO studies as a mechanism for involving undergraduate students in research. The PI's philosophy is to provide undergraduates with problem-solving opportunities that include equipment building and instrument operation as part of the research plan. Specifically, the PI will establish an undergraduate consortium of 5-10 students to work with him each semester on a directed project. Projects will require laboratory work, field work, and data interpretation and analysis. Also, the PI will establish partnerships with private industry to generate informal internships for students to assist them in obtaining employment within these companies.

9733638 Mak此项目是应职业计划征集而提交的。这是一个融合了研究和教学目标的四年职业发展计划。主要的科学目标集中在大气CO在背景海洋大气的对流层化学过程中的重要性。具体地说，PI将使用同位素化学信息(即14CO、13CO、C18O)：1)量化热带地区(OH浓度高的地区)的CO损失速率；2)表征大气CO源强度的相对时间趋势。通过测量~(14)CO来确定CO与OH反应的损失率。稳定的同位素组成(13CO和C18O)将被用来帮助限制大气CO相对来源强度的时间趋势。每周的空气样本将在莫纳罗亚天文台三年的时间内收集，并将分析三种一氧化碳同位素和一氧化碳大气丰度。在同一采样期间，将测量对流层低层的14CO年产生率，并将这些数据与从NASA戈达德3-D全球化学传输模型获得的模型模拟进行比较。这些拟议的活动将提供有关大气CO来源强度的新信息，特别是在热带太平洋上。教育计划使用拟议的大气CO研究作为让本科生参与研究的机制。PI的理念是为本科生提供解决问题的机会，包括设备制造和仪器操作，作为研究计划的一部分。具体地说，PI将建立一个由5-10名学生组成的本科生联盟，每学期与他一起完成一个指导项目。项目将需要实验室工作、实地工作以及数据解释和分析。此外，PI还将与私营企业建立伙伴关系，为学生提供非正式实习机会，帮助他们在这些公司就业。