Evaluation of global warming based on a precise observation of the atmospheric Ar/N2 ratio
| Project/Area Number |
15H02814
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | National Institute of Advanced Industrial Science and Technology |
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Principal Investigator |
Ishidoya Shigeyuki 国立研究開発法人産業技術総合研究所, 環境管理研究部門, 研究グループ付 (70374907)
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| Co-Investigator(Kenkyū-buntansha) |
遠嶋 康徳 国立研究開発法人国立環境研究所, 環境計測研究センター, 室長 (40227559)
坪井 一寛 気象庁気象研究所, 海洋・地球化学研究部, 主任研究官 (10553167)
後藤 大輔 国立極地研究所, 研究教育系, 助教 (10626386)
丹羽 洋介 気象庁気象研究所, 海洋・地球化学研究部, 主任研究官 (70588318)
村山 昌平 国立研究開発法人産業技術総合研究所, エネルギー・環境領域, 総括研究主幹 (30222433)
田口 彰一 国立研究開発法人産業技術総合研究所, 環境管理研究部門, 上級主任研究員 (10357395)
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| Co-Investigator(Renkei-kenkyūsha) |
MATSUEDA Hidekazu 気象庁気象研究所, 海洋地球化学研究部, 室長 (60354552)
MORIMOTO Shinji 東北大学, 理学研究科, 教授 (30270424)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2017: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2016: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2015: ¥10,270,000 (Direct Cost: ¥7,900,000、Indirect Cost: ¥2,370,000)
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| Keywords | 大気中アルゴン濃度 / 海洋貯熱量 / 地球温暖化 / 物質循環 |
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| Outline of Final Research Achievements |
Variations in the atmospheric Ar/N2 ratio at the surface are driven principally by air-sea Ar and N2 fluxes due to changes in solubility, and the Ar/N2 ratio is expected to be a unique tracer for spatiotemporally-integrated air-sea heat flux. We have conducted observations of the Ar/N2 ratio at Tsukuba, Hateruma Island, Cape Ochi-ishi, Takayama, Minamitorishima Island, Japan and at Syowa, Antarctica. The measurement system employing a mass spectrometer was used not only for the continuous observations at Tsukuba but also for the analyses of the air samples collected in flasks at other sites. We found clear seasonal Ar/N2 cycles with summertime maxima at all sites and year-to-year variations in the Ar/N2 ratio, derived from 5-years data at Tsukuba and Hateruma, generally in phase with the variations in the global ocean heat content reported by NOAA/NODC. These facts suggest that the Ar/N2 ratio observed in this study reflected wide-area ocean temperature changes.
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Report
(4 results)
Research Products
(28 results)
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[Presentation] Time and space variations of Atmospheric Potential Oxygen over the Western North Pacific observed by using a cargo aircraft C-130H2015
Author(s)
Shigeyuki Ishidoya, Kazuhiro Tsuboi, Shoichi Taguchi, Yosuke Niwa, Hidekazu Matueda, Shohei Murayama, Sinya Takatsuji, Tomonori Okuda, Koshiro Dehara, Yoki Mori, Shuichi Hosokawa
Organizer
APO Workshop
Place of Presentation
Scripps Institution of Oceanography, La Jolla, California, U.S.A.
Year and Date
2015-09-18
Related Report
Int'l Joint Research
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[Presentation] A system for continuous measurements of atmospheric O2/N2 and Ar/N2 ratio, stable isotopic ratios of N2, O2 and Ar and its application in preparing gravimetric standards for atmospheric O2/N2 ratio2015
Author(s)
Shigeyuki Ishidoya, Shohei Murayama, Nobuyuki Aoki, Takuya Shimosaka, Hiroaki Kondo
Organizer
18th WMO/IAEA Meeting on Carbon Dioxide, Other Greenhouse Gases, and Related Measurement Techniques (GGMT)
Place of Presentation
Scripps Institution of Oceanography, La Jolla, California, U.S.A.
Year and Date
2015-09-16
Related Report
Int'l Joint Research
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