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

9733638Mak这个项目是为了响应CAREER项目的征集而提交的。这是一个将研究和教学目标相结合的四年职业发展计划。主要的科学目标集中于大气CO在对流层化学过程中对背景海洋大气的重要性。具体来说，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）CO的损失率；2)表征大气CO源强度的相对时间趋势。通过测量14CO来确定CO与OH反应的损失率。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。每周一次的空气样本将在莫纳罗亚天文台收集，为期三年，并将分析三种CO同位素和CO大气丰度。在相同的采样期内，对流层下层14CO的年生成速率将被测量，这些数据将与美国宇航局戈达德3-D全球化学传输模式的模拟结果进行比较。这些拟议的活动将提供关于大气CO来源强度的新资料，特别是在热带太平洋上空。该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，每学期与他一起进行一个指导项目。项目将需要实验室工作，现场工作，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，帮助他们在这些企业就业。

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.