2021 Fiscal Year Final Research Report
Studies on the atmospheric potential oxygen in the Arctic region
Project/Area Number |
19K20444
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Research Category |
Grant-in-Aid for Early-Career Scientists
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Allocation Type | Multi-year Fund |
Review Section |
Basic Section 63010:Environmental dynamic analysis-related
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Research Institution | National Institute of Polar Research |
Principal Investigator |
Goto Daisuke 国立極地研究所, 研究教育系, 助教 (10626386)
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Project Period (FY) |
2019-04-01 – 2022-03-31
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Keywords | 炭素循環 / 大気中酸素 / 北極域 |
Outline of Final Research Achievements |
Atmospheric Potential Oxygen (APO) is a unique tracer that varies due to oxygen exchange between the atmosphere and the ocean, and is used for understanding the mechanism of oxygen exchange between the atmosphere and the ocean, ocean circulation, marine biological processes, and quantitative evaluation of the global carbon budget. In this study, systematic observation of atmospheric O2, CO2 and APO at Ny-Alesund, Svalbard was carried out. By comparing the inter-annual variation of the observed APO with climate change factors such as ENSO events and changes in sea surface temperature (SST) with decadal cycle, it was suggested that changes in atmosphere-ocean oxygen exchange associated with SST changes influence the inter-annual variation of APO. Furthermore, by analyzing the secular trend of O2, CO2 and APO, oceanic and terrestrial CO2 uptake was evaluated.
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Free Research Field |
大気科学
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Academic Significance and Societal Importance of the Research Achievements |
産業革命以降の人為起源のCO2排出量増加を主因とする「地球温暖化」は、国際的に重要な問題となっている。この問題に対応するためには、CO2がどこからどれだけ大気に放出され、どこでどれだけ吸収されるか、という地球表層における炭素収支を解明し、CO2増加の原因を定量的に理解しなければならない。本研究では、全球CO2収支の定量評価に利用可能な大気中O2およびCO2濃度の長期観測を実施した。観測された両者の長期的な変動傾向を解析することにより、近年の地球表層のCO2収支を定量的に評価し、全球炭素循環の定量理解に貢献した。
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