Effect of water vapor variations in the Antarctic stratosphere on the climate

• Project/Area Number: 26800245
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Meteorology/Physical oceanography/Hydrology
• Research Institution: National Institute of Polar Research
• Principal Investigator: Tomikawa Yoshihiro 国立極地研究所, 研究教育系, 准教授 (20435499)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000); Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
• Keywords: 水蒸気 / 南極 / 極渦 / 脱水 / 上部対流圏 / 成層圏水蒸気 / 水蒸気ゾンデ / 衛星観測 / 粒跡線 / 脱水過程

Outline of Final Research Achievements

Although water vapor variations around the tropopause have a large radiative forcing, its observation has not been conducted sufficiently, especially in the Antarctic. We successfully obtained accurate water vapor concentration data with high vertical resolution in the Antarctic tropopause region by the balloonborne hygrometer observations at Syowa Station (69S, 40E). Our integrated study based on balloon and satellite observations and a trajectory analysis showed interannual variations of dehydration amount in the Antarctic stratosphere and several kinds of mechanisms contributing to dehydration and rehydration in the Antarctic tropopause region. These results will contribute to predicting water vapor change in the Antarctic tropopause region and estimating its impact on the future climate under the condition of increasing greenhouse gases.

Research Products

• [Int'l Joint Research] NCAR(米国)
• [Journal Article] Balloon-borne observations of lower stratospheric water vapor at Syowa Station, Antarctica in 2013 (2015)
  • Author(s): Tomikawa, Y., K. Sato, N. Hirasawa, M. Tsutsumi, and T. Nakamura
  • Journal Title: Polar Science Volume: 9 Issue: 4 Pages: 345-353
  • DOI: 10.1016/j.polar.2015.08.003
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] Moistening of the Antarctic upper troposphere observed by balloonborne water vapor measurements (2018)
  • Author(s): Tomikawa, Y., M. Kohma, M. Takeda, and K. Sato
  • Organizer: ISAR-5
  • Int'l Joint Research
• [Presentation] Characteristics of the Antarctic tropopause region in winter of 2016 (2017)
  • Author(s): Tomikawa, Y., M. Kohma, M. Takeda, and K. Sato
  • Organizer: Sato's lab workshop 2017
  • Place of Presentation: 松濤軒（千葉）
  • Year and Date: 2017-03-15
• [Presentation] Fine vertical structure of the Antarctic tropopause region in winter of 2016 obtained by balloonborne ozone and water vapor observations (2017)
  • Author(s): Tomikawa, Y., M. Kohma, M. Takeda, and K. Sato
  • Organizer: IAPSO-IAMAS-IAGA Joint Assembly 2017
  • Int'l Joint Research
• [Presentation] Balloonborne ozone and water vapor measurements around the Antarctic tropopause region in winter of 2016 (2017)
  • Author(s): Tomikawa, Y., M. Kohma, M. Takeda, and K. Sato
  • Organizer: Joint SPARC Dynamics & Observations Workshop
  • Int'l Joint Research
• [Presentation] Moistening of the Antarctic upper troposphere via the warm conveyor belt (2017)
  • Author(s): Tomikawa, Y., M. Kohma, M. Takeda, and K. Sato
  • Organizer: The Eighth Symposium on Polar Science
  • Int'l Joint Research
• [Presentation] 南極昭和基地におけるオゾン・水蒸気ゾンデ集中観測（速報） (2017)
  • Author(s): 冨川喜弘、高麗正史、武田真憲、佐藤薫
  • Organizer: 日本気象学会2017年度春季大会
• [Presentation] 59次水蒸気・気温基準ゾンデ観測計画 (2017)
  • Author(s): 冨川喜弘
  • Organizer: 南極エアロゾル研究会
• [Presentation] 水蒸気・オゾンゾンデ観測で捉えられた南極上部対流圏の湿潤化プロセス (2017)
  • Author(s): 冨川喜弘、高麗正史、武田真憲、佐藤薫
  • Organizer: 東南極で検出される気候変動に関する研究集会
• [Presentation] 58次水蒸気・気温基準ゾンデ観測計画 (2016)
  • Author(s): 冨川喜弘
  • Organizer: 南極エアロゾル研究会
  • Place of Presentation: 国立極地研究所
  • Year and Date: 2016-08-03
• [Presentation] Dehydration processes inside the Antarctic polar vortex (2015)
  • Author(s): Tomikawa, Y.
  • Organizer: 2nd COSPAR symposium Water and Life in the Universe
  • Place of Presentation: Foz do Iguacu (Brazil)
  • Year and Date: 2015-11-12
  • Int'l Joint Research / Invited
• [Presentation] Dehydration processes inside the Antarctic polar vortex (2015)
  • Author(s): Tomikawa, Y.
  • Organizer: 2nd COSPAR Symposium
  • Place of Presentation: Foz do Iguacu, Brazil
  • Year and Date: 2015-11-12
  • Invited
• [Presentation] Lagrangian analysis of dehydration processes inside the Antarctic polar vortex (2015)
  • Author(s): Tomikawa, Y.
  • Organizer: Asian Conference on Meteorology 2015
  • Place of Presentation: 京都大学（京都市）
  • Year and Date: 2015-10-26
  • Int'l Joint Research
• [Presentation] 南極成層圏水蒸気の長期観測 (2015)
  • Author(s): 冨川喜弘、佐藤薫、高麗正史、中村卓司、堤雅基、平沢尚彦
  • Organizer: 第7回南極観測シンポジウム
  • Place of Presentation: ベルサール八重洲（東京都中央区）
  • Year and Date: 2015-09-17
• [Presentation] Trajectory-based analysis of dehydration processes inside the Antarctic polar vortex (2015)
  • Author(s): Tomikawa, Y.
  • Organizer: AOGS2015
  • Place of Presentation: Singapore
  • Year and Date: 2015-08-06
  • Int'l Joint Research
• [Presentation] Trajectory-based analysis of dehydration processes inside the Antarctic polar vortex (2015)
  • Author(s): Tomikwa, Y.
  • Organizer: AOGS2015
  • Place of Presentation: SUNTEC, Singapore
  • Year and Date: 2015-08-06
• [Presentation] 57次水蒸気・オゾンゾンデ観測計画 (2015)
  • Author(s): 冨川喜弘、高麗正史
  • Organizer: 南極エアロゾル研究会
  • Place of Presentation: 国立極地研究所（立川市）
  • Year and Date: 2015-07-29
• [Presentation] 2013年の南極下部成層圏における脱水過程 (2015)
  • Author(s): 冨川喜弘
  • Organizer: 日本気象学会2015年度春季大会
  • Place of Presentation: つくば国際会議場（つくば市）
  • Year and Date: 2015-05-24
• [Presentation] 2013年の南極下部成層圏における脱水過程 (2015)
  • Author(s): 冨川喜弘
  • Organizer: 日本気象学会2015年度春季大会
  • Place of Presentation: つくば国際会議場
  • Year and Date: 2015-05-24
• [Presentation] Dehydration process inside the Antarctic polar vortex in 2013 (2015)
  • Author(s): Tomikawa, Y.
  • Organizer: The 13th PANSY workshop
  • Place of Presentation: 国立極地研究所
  • Year and Date: 2015-03-12
• [Presentation] Balloon-borne Observations of Lower Stratospheric Water Vapor at the Antarctic Syowa Station (2015)
  • Author(s): Tomikawa, Y., K. Sato, M. Tsutsumi, T. Nakamura, and N. Hirasawa
  • Organizer: AMS 18th Conference on Middle Atmosphere
  • Place of Presentation: Phoenix, Arizona, USA
  • Year and Date: 2015-01-04 – 2015-01-08
• [Presentation] 南極下部成層圏の水蒸気量変動 (2014)
  • Author(s): 冨川喜弘、佐藤薫、堤雅基、中村卓司、平沢尚彦
  • Organizer: 第5回極域科学シンポジウム
  • Place of Presentation: 国立極地研究所
  • Year and Date: 2014-12-02 – 2014-12-05
• [Presentation] 南極昭和基地における2013年水蒸気ゾンデ観測 (2014)
  • Author(s): 冨川喜弘、佐藤薫、堤雅基、中村卓司、平沢尚彦
  • Organizer: 日本気象学会2014年度秋季大会
  • Place of Presentation: 福岡国際会議場
  • Year and Date: 2014-10-21 – 2014-10-23
• [Presentation] 南極昭和基地における下部成層圏水蒸気観測 (2014)
  • Author(s): 冨川喜弘、佐藤薫、堤雅基、中村卓司、平沢尚彦
  • Organizer: 日本地球惑星科学連合2014年大会
  • Place of Presentation: パシフィコ横浜
  • Year and Date: 2014-04-28 – 2014-05-02
• [Book] 南極氷床と大気物質循環・気候 (2017)
  • Author(s): 平沢尚彦・山内恭
  • Total Pages: 452
  • Publisher: 日本気象学会
  • ISBN: 9784904129166