A Study of the Abundance and 13C/12C Ratio of Atmospheric Carbon Dioxide and Oceanic Carbon in Relation to the Global Carbon Cycle

大气二氧化碳和海洋碳丰度及 13C/12C 比值与全球碳循环的关系研究

• 批准号: 8819398
• 负责人: Charles Keeling
• 金额: $ 122.77万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-07-15 至 1992-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8819398&HistoricalAwards=false
• 关键词: Study; Abundance; 13C; 12C; Ratio

During the International Geophysical Year (IGY) in 1957-8 Professor Keeling of Scripps Institution of Oceanography initiated a high precision atmospheric carbon dioxide measurements program at Mauna Loa, Hawaii to study the biogeochemical carbon cycle. This measurement program has been continued and expanded since that time. In the early 1960's the data set available from this program demonstrated conclusively that the carbon dioxide concentration in the atmosphere was increasing at a rate of approximately a third of one percent per year. This increase in atmospheric carbon dioxide is caused primarily by the combustion of fossil fuels. Since carbon dioxide is a "greenhouse gas" it is expected that within a few decades its increased atmospheric concentration will lead to climatic changes. Among the central issues of the carbon dioxide question is the reliability of predictions of future concentrations. Such predictions require an understanding of the biogeochemical carbon dioxide sink and source strengths. In this research project emphasis will be on the measurement of the carbon isotopic composition of carbon dioxide in the atmosphere and oceans as a function of space and time. Additionally, high precision measurements of dissolved carbon dioxide will be made at key locations in surface and subsurface ocean water. These, and supporting chemical measurements, will be used to help evaluate the oceans ability to absorb carbon dioxide released to the atmosphere by the combustion of fossil fuels.

在1957 - 8的国际地球物理年度（IGY）期间，Scripps海洋学研究所的Keeling教授在夏威夷Mauna LOA的高精度大气二氧化碳测量计划开始了研究生物地球化学碳循环。 自那时以来，该测量计划一直在继续和扩展。 在1960年代初期，该计划可用的数据集表明，大气中的二氧化碳浓度的增加，每年约为三分之一的三分之一。 大气二氧化碳的这种增加主要由化石燃料的燃烧引起。 由于二氧化碳是一种“温室气”，因此预计在几十年内，大气浓度的增加将导致气候变化。 二氧化碳问题的主要问题之一是预测未来浓度的可靠性。 这样的预测需要了解生物地球化学二氧化碳水槽和源强度。 在这个研究项目中，重点将是测量大气和海洋中二氧化碳的碳同位素组成，这是时空和时间的函数。 此外，将在地面和地下海水的关键位置进行溶解的二氧化碳的高精度测量。 这些和支持化学测量将用于评估海洋通过化石燃料燃烧到大气中吸收二氧化碳的能力。