Collaborative Research: Atmospheric measurements of O2/N2 ratio, CO2 concentration, and CO2 isotopes in support of the Arctic Observing Network

合作研究：O2/N2 比率、CO2 浓度和 CO2 同位素的大气测量，支持北极观测网络

• 批准号: 1304270
• 负责人: Ralph Keeling
• 金额: $ 140.44万
• 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: 2014
• 资助国家: 美国
• 起止时间: 2014-01-15 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1304270&HistoricalAwards=false
• 关键词: Collaborative; Research; Atmospheric; measurements; O2

This project will support a continuation of time series measurements of atmospheric CO2 concentration, the stable isotopes of CO2, and the O2/N2 and Ar/N2 ratios of air samples collected at Arctic sampling stations. Measurements of O2/N2 ratio at Arctic sites, when also combined with measurements at lower latitudes, have the potential to help quantify the magnitude of the seasonal air-sea exchanges of O2 with the Arctic Ocean, which could be a key indicator of biogeochemical change in a time of rapid Arctic warming. Although the land biosphere also contributes to seasonal variations in O2/N2 ratio, the ocean contribution can be resolved by combining O2/N2 and CO2 data to compute the tracer atmospheric potential oxygen (APO), which is effectively an atmospheric tracer of ocean biology and chemistry. This work will draw on support from international collaborators, with the potential to shape Arctic O2/N2 measurements by the international community into a critical component of the AON. Measurements of the 13C/12C ratio and 18O/16O ratio at Arctic sites also may provide key early warning indicators of ecological change. The project will support the archiving of aliquots of atmospheric CO2 in background arctic air to be used for open-ended purposes by future researchers. Finally, the project will support graduate student involvement in the collection and foster collaborations among scientific groups engaged in measurements of O2 and CO2 isotopes in support of detecting Arctic change.

该项目将支持大气二氧化碳浓度，稳定同位素以及在北极采样站收集的空气样品的O2/N2和AR/N2比的时间序列测量值。 当北极部位的O2/N2比率与较低纬度的测量结合在一起时，有可能帮助量化北极海的季节性空气 - 海洋交换的幅度，这可能是生物地球化学变化的关键指标在北极快速变暖的时期。尽管土地生物圈也有助于O2/N2比的季节性变化，但可以通过组合O2/N2和CO2数据来解决海洋贡献，以计算示踪剂大气潜在氧（APO），这实际上是海洋生物学和海洋生物学和海洋生物学和海洋生物学的大气轨迹。化学。这项工作将取决于国际合作者的支持，并有可能将国际社会的北极O2/N2测量结果塑造成AON的关键组成部分。 北极部位的13C/12C比和18O/16O比的测量也可能提供生态变化的关键预警指标。该项目将支持在背景北极空气中的大气二氧化碳等分试样的存档，以便未来的研究人员用于开放式目的。最后，该项目将支持研究生参与收集和培养合作的科学团体，从事O2和CO2同位素的测量，以支持检测北极变化。