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.

9733638Mak 该项目是为了响应职业计划征集而提交的。 这是一个整合研究和教学目标的四年职业发展计划。主要科学目标集中于大气二氧化碳在背景海洋大气对流层化学过程中的重要性。 具体而言，PI 将使用同位素化学信息（即 14CO、13CO、C18O）： 1) 量化热带地区（OH 浓度较高）的 CO 损失率； 2) 表征大气 CO 源强度的相对时间趋势。CO 通过与 OH 反应而损失的速率将通过测量 14CO 来确定。 稳定同位素组成（13CO 和 C18O）将用于帮助限制大气 CO 相对源强度的时间趋势。莫纳罗亚天文台将在三年内收集每周空气样本，并针对这三个CO 同位素异构体和 CO 大气丰度。 在同一采样期内，将测量对流层低层的 14CO 年生产率，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二氧化碳来源强度的新信息，特别是在热带太平洋上空。 该教育计划使用拟议的大气二氧化碳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，其中包括设备建造和仪器操作作为研究计划的一部分。 具体来说，PI 将建立一个由 5-10 名学生组成的本科生联盟，每学期与他一起开展一个定向项目。 项目需要实验室工作、现场工作以及数据解释和分析。 此外，PI还将与私营企业建立合作伙伴关系，为学生提供非正式实习机会，帮助他们在这些公司内就业。