Temperature of North Pacific subtropical mode water over the past 100 years: ocean warming and decadal-scale variations
| Project/Area Number |
15K17756
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | Tohoku University |
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Principal Investigator |
Shusaku Sugimoto 東北大学, 学際科学フロンティア研究所, 助教 (50547320)
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| Research Collaborator |
FUKUI SHIN 東北大学, 大学院理学研究科, 研究員
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | 亜熱帯モード水 / 海洋温暖化 / 10年規模変動 / CMIP5 / 再解析データ / 領域大気モデル / 大気海洋相互作用 / 10年周期変動 / 中規模渦 / 観測資料 / 気候変化 / 十年規模変動 / 黒潮続流 / 北太平洋温暖化 / 100年時系列 / 北太平洋亜熱帯モード水 |
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| Outline of Final Research Achievements |
I investigated long-term behavior of the subtropical mode water (STMW) in the North Pacific, using historical temperature profiles from academic institutions from around the world. I showed that the STMW has marked warmed over the past one hundred years, the warming rate of which is estimated as 1.13 ± 0.27 °C per century. The STMW temperature has significant decadal (about 10 year) variations, which is formed by a vertical entrainment process associated with a deepening of mixed layer depth during winter. By conducting atmospheric model experiments, I found that significant warming due to the eddies with the STMW extend not only into the near-surface atmosphere but also into the high altitude, reaching about 4000m.
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Report
(4 results)
Research Products
(31 results)
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[Journal Article] Fifty years of the 137E repeat hydrographic section in the western North Pacific Ocean2018
Author(s)
Oka, E., M. Ishii, T. Nakano, T. Suga, S. Kouketsu, M. Miyamoto, H. Nakano, B. Qiu, S. Sugimoto, and Y. Takatani
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Journal Title
Journal of Oceanography
Volume: 74
Pages: 115-145
NAID
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Presentation] A long-term reference for detecting oceanic variations in the western North Pacific: JMA 50-year long 137°E repeat hydrographic section2016
Author(s)
Nkano, T., H. Inoue, K. Murakami, Y. Takatani, A. Kojima, Y. Kitamura, M. Ishii, E. Oka, S. Sugimoto, and T. Suga
Organizer
PICES 2016 Annual Meeting
Place of Presentation
Omni San Diego hotel, San Diege, USA
Related Report
Int'l Joint Research
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