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Long-term trend of the sea surface temperature front in the East China Sea and its effects on the atmosphere

Research Project

Project/Area Number 19K03960
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 InstitutionHokkaido University

Principal Investigator

Sasaki Yoshinori  北海道大学, 理学研究院, 准教授 (50604815)

Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords黒潮 / 大気海洋相互作用 / 領域海洋モデル / 地球温暖化 / 領域大気モデル / 梅雨前線 / 東シナ海 / 領域モデル / 長期変動
Outline of Research at the Start

本研究は,大気への顕著な影響が報告されている東シナ海の黒潮に伴う海面水温前線に注目し,この海面水温前線の長期変動のメカニズム,海面水温前線の経年変動に対する大気応答の季節依存性,海面水温前線の長期変動に対する大気応答の3点を明らかにすることを目的とし,観測・再解析データと領域大気モデル,領域海洋モデルを組み合わせた解析を行う研究である.

Outline of Final Research Achievements

To understand a long-term trend of ocean temperatures in the East China Sea, we performed a regional ocean model hindcast experiment from 1871 to 2010. We demonstrated that the warming of sea surface temperatures (SSTs) was not spatially uniform but had a large amplitude along the Kuroshio and the coast of China over the continental shelf. The warmings in both regions were induced by the trend of ocean advection.
The wintertime atmospheric response to the SST anomalies associated with the large meander of the Kuroshio was examined using a regional atmospheric model. The results showed that the surface wind convergence and divergence were found over the positive SST anomaly along the southeastern coast of Japan and the cyclonic cold-core eddy, respectively. In addition, the number of rainy days increased significantly over the warm SST anomaly during the Kuroshio large meander period.

Academic Significance and Societal Importance of the Research Achievements

観測データと高解像度の数値シミュレーションを併用することにより,東シナ海の20世紀全体を通じた温暖化傾向の空間分布とそのメカニズム,特に黒潮の温暖化傾向に対する役割を世界に先駆けて定量的に明らかにすることができた。また黒潮の変動による海面水温変動に対する大気の応答,特に日本周辺における気圧や降水活動の変動について明らかにし,大気と海洋の両面から中緯度大気海洋相互作用についての理解を進めることができた。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (10 results)

All 2024 2023 2021 2020 2019 Other

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (6 results) (of which Int'l Joint Research: 3 results) Remarks (1 results)

  • [Journal Article] Impact of the Kuroshio large meander on local atmospheric circulation and precipitation in winter2024

    • Author(s)
      Sasaki Yoshi N.、Ito Ryunosuke
    • Journal Title

      Progress in Earth and Planetary Science

      Volume: 11 Issue: 1

    • DOI

      10.1186/s40645-024-00620-3

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Rapid warming of sea surface temperature along the Kuroshio and the China coast in the East China Sea during the 20th century2021

    • Author(s)
      Sasaki Yoshi N.、Umeda Chisato
    • Journal Title

      Journal of Climate

      Volume: - Issue: 12 Pages: 4803-4815

    • DOI

      10.1175/jcli-d-20-0421.1

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Increasing trend in Japan Sea Throughflow transport2020

    • Author(s)
      Kida Shinichiro、Takayama Katsumi、Sasaki Yoshi N.、Matsuura Hiromi、Hirose Naoki
    • Journal Title

      Journal of Oceanography

      Volume: 77 Issue: 1 Pages: 145-153

    • DOI

      10.1007/s10872-020-00563-5

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 黒潮大蛇行に対する冬季の大気応答についての数値実験2023

    • Author(s)
      佐々木 克徳,伊藤 竜之助
    • Organizer
      JpGU 2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] Rapid warming of sea surface temperature along the Kuroshio and the China coast in the East China Sea during the 20th century2021

    • Author(s)
      Sasaki, Y. N. and C. Umeda
    • Organizer
      AOGS 18th Annual Meeting
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Rapid warming of sea surface temperature along the Kuroshio and the China coast in the East China Sea during the 20th century2021

    • Author(s)
      Sasaki, Y. N. and C. Umeda
    • Organizer
      International workshop for mid-latitude air-sea interaction
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Rapid warming of sea surface temperature along the Kuroshio and the China coast in the East China Sea during the 20th century2020

    • Author(s)
      Sasaki, Y. N. and C. Umeda
    • Organizer
      AGU Fall Meeting 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 20世紀における東シナ海の海面水温上昇の季節依存性2019

    • Author(s)
      佐々木 克徳,梅田 千智
    • Organizer
      2019年度日本海洋学会秋季大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Sea surface temperature trend in the East China Sea during the 20th century simulated by a regional ocean model2019

    • Author(s)
      Sasaki, Y. N., and C. Umeda
    • Organizer
      JpGU Meeting 2019
    • Related Report
      2019 Research-status Report
  • [Remarks] 日本周辺の海の温暖化

    • URL

      https://www.sci.hokudai.ac.jp/~sasakiyo/research.html#sec4

    • Related Report
      2021 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2025-01-30  

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