Atmospheric dynamics with new potential-vorticity analysis

• Project/Area Number: 16K05550
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Meteorology/Physical oceanography/Hydrology
• Research Institution: Hokkaido University
• Principal Investigator: Horinouchi Takeshi 北海道大学, 地球環境科学研究院, 准教授 (50314266)
• Research Collaborator: Matsumura Shinji
• Project Period (FY): 2016-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: 気象 / 気候 / 降水システム / 地球流体力学 / 渦位 / 降水 / 気候変動 / ジェット気流 / 総観気象 / 気象学 / 大気現象

Outline of Final Research Achievements

This study was conducted to advance the methodology to analyze meteorological data such as satellite data, objective analysis data and numerical simulation data and further to advance our understanding of weather systems by advancing potential vorticity-based analysis that we had developed. We elucidated the mechanism of upper-tropospheric driving of summertime synoptic precipitation over East Asia and the Northwestern Pacific. It was also revealed that such meteorological knowledge and methodology help explain climate projection by climate models.

Academic Significance and Societal Importance of the Research Achievements

本研究により，気象，気候の新しい診断法の有用性が示された。その成果により，降水過程をよりよく説明できるようになった。将来的には，天気予報において現在よりも正確でわかりやい説明をすることにつながると期待される。また，渦位とジェットに着目することで，気象から気候へ，シームレスな診断が可能になることが示された。それは，地球温暖化に伴う中緯度のローカルな応答を診断，説明するのに役立つため，気候予測にも資する。

Research Products

• [Journal Article] Jet-Precipitation Relation and Future Change of the Mei-Yu-Baiu Rainband and Subtropical Jet in CMIP5 Coupled GCM Simulations (2019)
  • Author(s): Horinouchi Takeshi、Matsumura Shinji、Ose Tomoaki、Takayabu Yukari N.
  • Journal Title: Journal of Climate Volume: 32 Issue: 8 Pages: 2247-2259
  • DOI: 10.1175/jcli-d-18-0426.1
  • NAID: 120006727604
  • Peer Reviewed / Open Access
• [Journal Article] Contrasting Responses of Midlatitude Jets to the North Pacific and North Atlantic Warming (2019)
  • Author(s): Matsumura Shinji、Ueki Satoaki、Horinouchi Takeshi
  • Journal Title: Geophysical Research Letters Volume: 46 Issue: 7 Pages: 1-9
  • DOI: 10.1029/2019gl082550
  • NAID: 120006732194
  • Peer Reviewed
• [Journal Article] Meandering subtropical jet and precipitation over summertime East Asia and the northwestern Pacific. (2017)
  • Author(s): Horinouchi, T. and A. Hayashi,
  • Journal Title: J. Atmos. Sci., Volume: 74(4), Issue: 4 Pages: 1233-1247
  • DOI: 10.1175/jas-d-16-0252.1
  • NAID: 120006347209
  • Peer Reviewed / Open Access
• [Presentation] Dynamical UTLS control on summertime precipitation from weather to climate (2018)
  • Author(s): Horinouchi T.
  • Organizer: SPARC General Assembly 2018
  • Int'l Joint Research
• [Presentation] CMIP5 CGCM群におけるジェットと降水の関係と梅雨の南北シフト (2018)
  • Author(s): 堀之内 武
  • Organizer: 日本気象学会2018年秋季大会
• [Presentation] East Asian summertime jet and precipitation in CMIP5 models (2018)
  • Author(s): T. Horinouchi, Y. Takayabu, C. Yokoyama, T. Ose, S. Matsumura
  • Organizer: The 3rd International Workshop on “Climate Change and Precipitation in the East Asia”, Tokyo, Japan (2017)
  • Int'l Joint Research
• [Presentation] ジェット・渦位分布と降水分布 (2017)
  • Author(s): 堀之内武・舘野愛実
  • Organizer: 日本気象学会2017年春季大会
• [Presentation] 中緯度の対流圏上層の渦位擾乱と降水の総観規模変動の関係 (2016)
  • Author(s): 舘野愛実
  • Organizer: 日本気象学会2016年秋季大会
  • Place of Presentation: 名古屋（名古屋大学東山キャンパス）
  • Year and Date: 2016-10-26
• [Presentation] Jet and precipitation over summertime East Asia and the northwestern Pacific: from day-to-day variability to climatological understanding (2016)
  • Author(s): Horinouchi T.
  • Organizer: AOGS 2016
  • Place of Presentation: China National Convention Centre, Beijing, China
  • Year and Date: 2016-07-31
  • Int'l Joint Research
• [Presentation] 夏季の大陸東岸から洋上にかけての降水帯とその日々の分布の概念モデル (2016)
  • Author(s): 堀之内 武
  • Organizer: 日本気象学会2016年春季大会
  • Place of Presentation: 東京（国立オリンピック青少年総合センター）
  • Year and Date: 2016-05-18