2022 Fiscal Year Final Research Report
Attribution and projection of sea surface temperature changes around Japan from the past to future
Project/Area Number |
19H01962
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Review Section |
Basic Section 17020:Atmospheric and hydrospheric sciences-related
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Research Institution | The University of Tokyo |
Principal Investigator |
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Co-Investigator(Kenkyū-buntansha) |
塩竈 秀夫 国立研究開発法人国立環境研究所, 地球システム領域, 室長 (30391113)
建部 洋晶 国立研究開発法人海洋研究開発機構, 地球環境部門(環境変動予測研究センター), グループリーダー (40466876)
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Project Period (FY) |
2019-04-01 – 2023-03-31
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Keywords | 気候変化 / 海面水温 / 全球気候モデル / 温暖化予測 |
Outline of Final Research Achievements |
It is unequivocal that climate has warmed due to human activity and the surface warming is conspicuous over the past 30-40 years in particular. World ocean surface has also warmed with about 0.5 degree per century, and the trend is more than double in the North Pacific around Japan. Because of the impact of regional ocean warming on marine ecosystems and extreme hot weather, it is important to understand the cause of large ocean surface warming around Japan. This study revealed that the recent warming of the ocean surface around Japan was explained not only by the greenhouse gas induced global warming but also by a temporary signature associated with declining atmospheric aerosols that otherwise act to cool the surface. Both radiative drivers acted to heat the ocean surface around Japan via atmospheric heat transport from warming Eurasian continent. The above finding will help decision making for climate change adaptation in Japan.
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Free Research Field |
気候力学
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Academic Significance and Societal Importance of the Research Achievements |
大気および地表の気候の決定要因は海面水温の分布であり、特に地域の気候変化にとって、周辺海域の温暖化が大きな影響をおよぼす。日本周辺で特に海水温の上昇が大きいことは、我が国の水産資源へのダメージや、夏季の高温事象の増加の要因となっていると考えられ、本研究の結果はそれらの温暖化影響を理解する上で重要な知見をもたらす。特に、エアロゾルの排出源による一時的な昇温は、将来は作用しないと考えられる一方、ユーラシア大陸のさらなる温暖化が代わりに海水温の上昇をもたらす可能性が指摘されたことは、我が国の気候変動適応にとって有益な示唆となる。
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