Measurements of Variations in Atmospheric Oxygen/Nitrogen and Argon/Nitrogen Ratios, and Carbon Dioxide Concentration in Relation to the Carbon Cycle and Climate

该项目支持继续测量在世界各地地面台站收集的烧瓶样品中的大气氧/氮（O2/N2）和氩/氮（Ar/N2）比率以及二氧化碳（CO2）混合比率。这些数据将改善二氧化碳源和汇的特性，并为描述碳固存的全球模型提供试验平台，特别是与气候强迫有关的模型，并将有助于及早发现碳循环功能的任何重大变化。O2/N2数据用于分离海洋和陆地对大气CO2的影响。大气Ar/N2比值主要对海洋对Ar和N2的热致吸入和释气敏感。通过限制大规模的海气热交换，Ar/N2测量可以为了解海洋在气候系统中的作用和了解影响大气中CO2保留的气候过程提供更好的基础。

This project supports the continuation of the measurement of the atmospheric oxygen/nitrogen (O2/N2) and argon/nitrogen (Ar/N2) ratios and carbon dioxide (CO2) mixing ratio in flask samples collected at ground-based stations around the world. These data will improve the characterization of sources and sinks of CO2 and provide a test bed for global models that describe carbon sequestration, particularly in relation to climate forcing, and will allow for early detection of any major shifts in carbon cycle function. The O2/N2 data are used for separating oceanic and terrestrial influences on atmospheric CO2. The atmospheric Ar/N2 ratio is sensitive mainly to thermally-induced ingassing and outgassing of Ar and N2 by the oceans. By constraining large-scale air-sea heat exchanges, the Ar/N2 measurements can provide an improved basis for understanding the oceans' role in the climate system, and for understanding climatic processes that influence the retention of CO2 in the atmosphere.