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Observation of atmospheric pressure fluctuations for establishing direct measurements of air-sea CO2 flux

Research Project

Project/Area Number 18K03754
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 17020:Atmospheric and hydrospheric sciences-related
Research InstitutionJapan Coast Guard Academy (Center for Research in International Marine Policy)

Principal Investigator

KONDO FUMIYOSHI  海上保安大学校(国際海洋政策研究センター), 国際海洋政策研究センター, 准教授 (40467725)

Co-Investigator(Kenkyū-buntansha) 杣谷 啓  大同大学, 工学部, 准教授 (70581429)
Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2019: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2018: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Keywords大気圧変動 / 渦相関法 / 空気密度変動補正 / WPL補正 / 地表面フラックス / 海面フラックス / 陸面フラックス / 大気海洋相互作用 / 大気乱流 / 二酸化炭素 / 大気海洋気体交換 / 温室効果気体
Outline of Final Research Achievements

In this study, techniques for accurately measuring atmospheric pressure fluctuations due to atmospheric turbulence were developed, and impacts on air density fluctuation correction for eddy covariance techniques which is the only direct measurement of air-sea CO2 flux were clarified. As a results, the air density fluctuation correction theory considering the pressure fluctuation term was demonstrated over the asphalt surface, and the effects of the pressure fluctuation correction term for air-land and air-sea CO2 fluxes by eddy covariance technique were clarified.

Academic Significance and Societal Importance of the Research Achievements

海洋と大気を結合する海面では、運動量や熱、CO2をはじめとする気体など様々な物質が交換されている。その中でも地球温暖化に最も寄与するCO2の地球表層における循環を把握するには、地表面の約7割を占める海洋大気間における交換量とその分布を精確に評価することは学術的や社会的に意義がある。
本研究では、大気中で増加するCO2の海洋の吸収量を精確に評価するため、大気乱流による気圧変動の計測法を開発、海洋大気間のCO2交換量の唯一の直接測定法である渦相関法において必須である空気密度変動補正について、これまで考慮されていない気圧変動項の影響を明らかにし、CO2交換量の評価手法を確立させための研究成果をあげた。

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (13 results)

All 2022 2021 2020 2019 2018

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (9 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] Atmosphere-sea ice-ocean interaction study in Saroma-ko Lagoon, Hokkaido, Japan 20212022

    • Author(s)
      Nomura, D., P. Wongpan, T. Toyota, T. Tanikawa, Y. Kawaguchi, T. Ono, T. Ishino, M. Tozawa, T. P. Tamura, I. S. Yabe, E. Y. Son, F. Vivier, A. Lourenco, M. Lebrun, Y. Nosaka, T. Hirawake, A. OOKI, S. Aoki, B. Else, F. Fripiat, J. Inoue, and M. Vancoppenolle
    • Journal Title

      Bulletin of Glaciological Research

      Volume: 40 Issue: 0 Pages: 1-17

    • DOI

      10.5331/bgr.21R02

    • ISSN
      1345-3807, 1884-8044
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Decadal vision in oceanography 2021: Air―sea boundary2021

    • Author(s)
      岩本洋子,相木秀則,磯口治,大林由美子,近藤文義,近藤能子,西岡純
    • Journal Title

      Oceanography in Japan

      Volume: 30 Issue: 5 Pages: 199-225

    • DOI

      10.5928/kaiyou.30.5_199

    • NAID

      130008131951

    • ISSN
      0916-8362, 2186-3105
    • Year and Date
      2021-11-15
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A small non-research vessel as a platform for lake surface flux measurements2021

    • Author(s)
      Michiaki SUGITA, Jingyuan WANG, Chao ZANG and Fumiyoshi KONDO
    • Journal Title

      Hydrological Research Letters

      Volume: 15 Issue: 2 Pages: 16-22

    • DOI

      10.3178/hrl.15.16

    • NAID

      130008021864

    • ISSN
      1882-3416
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 10Hz測定光学粒子計による海上波浪境界層観測2020

    • Author(s)
      相木秀則,近藤文義,根田昌典,田中 潔,藤田敏男
    • Journal Title

      エアロゾル研究

      Volume: 35 Pages: 160-169

    • NAID

      130007925089

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] 大気圧観測プローブの計測確度の数値的検討2022

    • Author(s)
      足立尚哉,上田悠悟,近藤文義,内田孝紀,杣谷啓
    • Organizer
      日本設計工学会東海支部令和3年度研究発表講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 大気圧観測プローブの計測確度の数値的検討2021

    • Author(s)
      杣谷啓,近藤文義,内田孝紀
    • Organizer
      日本設計工学会2021年度秋季大会研究発表講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] On the use of a light-weighted membrane drier for CO2 flux measurements in the cold environments2021

    • Author(s)
      Taichi Noshiro, Daiki Nomura, Fumiyoshi Kondo, Keisuke Ono, Hiroki Ikawa
    • Organizer
      AsiaFlux Online Conference 2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] 大気圧観測プローブの計測確度に対する風速・風向の影響2021

    • Author(s)
      杣谷啓,近藤文義,内田孝紀
    • Organizer
      日本設計工学会東海支部令和2年度研究発表講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] Eddy covariance (EC) drying air comparison for air-sea ice CO2 flux measurement in Tsukuba, Japan2020

    • Author(s)
      Daiki Nomura, Hiroki Ikawa, Fumiyoshi Kondo, keisuke Ono and Brent Else
    • Organizer
      Joint BEPSII and ECVice 2020 annual meeting
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 微小な海面CO2フラックスを評価するための大気圧乱流変動の観測2020

    • Author(s)
      近藤文義,杣谷啓
    • Organizer
      日本農業気象学会2020年全国大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 微気象学的手法を用いた外洋域における海面フラックスの直接測定2019

    • Author(s)
      近藤文義,小宮秀治郎,登尾浩助,相木秀則,轡田邦夫,植松光夫,塚本修
    • Organizer
      日本地球惑星科学連合2019年大会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 渦相関法による海面フラックスの直接測定について2019

    • Author(s)
      近藤文義
    • Organizer
      平成30年度名古屋大学宇宙地球環境研究所共同利用集会「海洋波および大気海洋相互作用に関するワークショップ」
    • Related Report
      2018 Research-status Report
  • [Presentation] 大気乱流による気圧変動の直接測定2018

    • Author(s)
      近藤文義,大西歩樹,常川康太,前田論平,山本晴加,塚本修
    • Organizer
      気象学会2018年度春季大会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2023-01-30  

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