川上 雄真
川上 雄真
研究官, 博士 (理学)
研究官, 博士 (理学)
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気象庁気象研究所
全球大気海洋研究部 第四研究室
〒300-0052 茨城県つくば市長峰１-１
y-kawakami [at] mri-jma.go.jp
専門分野
専門は海洋物理学です.
北太平洋の物理場の変動を, 観測資料解析や海洋モデル実験により調べています.
また, 海洋学の観点から気候変動についても研究しています.
研究テーマ
黒潮/黒潮続流の変動
親潮の変動
海面水温の変動
表層水塊の変動
大気海洋相互作用
研究成果（査読付原著論文）
Usui, N., Hirose, N., Sakamoto, K., Asai, H., Nishikawa, S., Igarashi, H., Kawakami, Y., Aoki, K., Nakano, H., and Ishikawa, Y. (2026):
Four-dimensional variational ocean reanalysis for the seas around Japan over 60 years (FORA-JPN60):Part I - system configuration and basic performance.
Journal of Oceanography, in press.
https://doi.org/10.1007/s10872-026-00795-xAoki, K., Nakano, H., Hirose, N., Usui, N., Sakamoto, K., Toyoda, T., Urakawa, S., and Kawakami, Y. (2026):
Application of variational autoencoder-based clustering for geophysical fluid circulations with small smaple size.
Journal of Geophysical Research: Machine Learning and Computation, 3, e2025JH001051
https://doi.org/10.1029/2025JH001051Ushijima, Y., Sakamoto, K., Yagi, K., Kawakami, Y., Togawa, H., Sasaki, H., and Fukuda, Y. (2026):
Marine heatwave around Japan over the past four decades: links to interannual-to-decadal variability of sea surface temperature.
Journal of Oceanography, in press
https://doi.org/10.1007/s10872-026-00787-xUshijima, Y., Nakano, H., Sakamoto, K., Mizuta, R., Kawakami, Y., and Tsujino, H. (2026):
Upper-ocean warming in the subtropical North Pacific Ocean due to the intensified Kuroshio Extension in the eddying model compared to the non-eddy-resolving model.
Journal of Climate, 39, 1015-1031
https://doi.org/10.1175/JCLI-D-25-0060.1Kawakami, Y., Hirose, N., Nakano, H., Urakawa, L. S., Aoki, K., Hirahara, S., and Toyoda, T. (2026):
Oceanic cool spot formed off Boso Peninsula in the late June 2022.
Journal of Oceanography, 82, 109-118
https://doi.org/10.1007/s10872-025-00768-6Toyoda, T., Urakawa, L. S., Sakamoto, K., Kawakami, Y., Aoki, K., Nakano, H., Takaya, Y., Toyama, K., Kosugi, N., Kitamura, Y., and Ishii, M. (2025):
Sensitivity of the Arctic sea ice representation to the ice thickness category resolution in an OGCM.
Journal of Oceanography, 81, 273-288
https://doi.org/10.1007/s10872-025-00748-wSugimoto, S., Kojima, A., Sakamoto, T., Kawakami, Y., and Nakano, H. (2025):
Influence of Extreme Northward Meandered Kuroshio Extension during 2023–2024 on Ocean-Atmosphere Conditions in the Sanriku offshore region, Japan
Journal of Oceanography, 81, 203-215
https://doi.org/10.1007/s10872-025-00747-xToyoda, T., Hirose, N., Sakamoto, K., Nakano, H., Urakawa, L. S., Kawakami, Y., Aoki, K., Yamagami, A., Ushijima, Y., Usui, N., Yamanaka, G., Nakayama, T., In, T., Kuji, T., Kofuji, H., and Tanaka, T. (2025):
Bottom topography effect on the seasonal mode generation of the Tsugaru Warm Current.
Journal of Climate, 38, 1791-1811
https://doi.org/10.1175/JCLI-D-24-0124.1Nakano, H., Urakawa, L. S., Aoki, K., Kawakami, Y., and Hirahara, S. (2025):
On the speeding up and accuracy of the Second Order Moment (SOM) advection scheme using a mixed-precision method.
Ocean Modeling, 194, 102495
https://doi.org/10.1016/j.ocemod.2024.102495Kawakami, Y., Nakano, H., Urakawa, L. S., Toyoda, T., Aoki, K., Hirose, N., and Usui, N. (2025):
Temporal changes of the Oyashio water distribution east of Japan under the changing climate: development of an objective evaluation method and its application.
Journal of Oceanography, 81, 5-21
https://doi.org/10.1007/s10872-024-00727-7Kawakami, Y., Nakano, H., Urakawa, L. S., Toyoda, T., Sakamoto, K., Nishikawa, S., Sugiyama, T., Kurogi, M., Ishikawa, Y., Sato, K., and Yamanaka, G. (2024):
Future changes in marine heatwaves based on high-resolution ensemble projections for the northwestern Pacific Ocean.
Journal of Oceanography, 80, 177-195
https://doi.org/10.1007/s10872-024-00714-yToyoda, T., Sakamoto, K., Toyota, T., Tsujino, H., Urakawa, L. S., Kawakami, Y., Yamagami, A., Komatsu, K. K., Yamanaka, G., Tanikawa, T., Shimada, R., and Nakano, H. (2024):
Improvements of sea ice thermodynamics with variable sea ice salinity and melt pond parameterizations in an OGCM.
Ocean Modelling, 187, 102288
https://doi.org/10.1016/j.ocemod.2023.102288Kawakami, Y., Nakano, H., Urakawa, L. S., Toyoda, T., Aoki, K., and Usui, N. (2023):
Northward shift of the Kuroshio Extension during 1993－2021.
Scientific Reports, 13, 16223
https://doi.org/10.1038/s41598-023-43009-wToyoda, T., Urakawa, L. S., Aiki, H., Nakano, H., Shindo, E., Yoshimura, H., Kawakami, Y., Yamagami, A., Ushijima, Y., Harada, Y., Kobayashi, C., Tomita, H., Tozuka, T., and Yamanaka G. (2023):
Effective generation mechanisms of tropical instability waves as represented by high-resolution coupled atmosphere-ocean prediction experiments.
Scientific Reports, 13, 14742
https://doi.org/10.1038/s41598-023-41159-5Sakamoto, K., Nakano, H., Urakawa, S., Toyoda, T., Kawakami, Y., Tsujino, H., and Yamanaka, G. (2023):
Reference manual for the Meteorological Research Institute Community Ocean Model version 5 (MRI.COMv5).
Technical Reports of the Meteorological Research Institute, 87
https://doi.org/10.11483/mritechrepo.87Kawakami, Y., Nakano, H., Urakawa, L. S., Toyoda, T., Sakamoto, K., Yamanaka, G., and Sugimoto, S. (2023):
Cold- versus warm-season-forced variability of the Kuroshio and North Pacific subtropical mode water.
Scientific Reports, 13, 256
https://doi.org/10.1038/s41598-022-26879-4Nakano, H., Urakawa, L. S., Sakamoto, K., Toyoda, T., Kawakami, Y., and Yamanaka, G. (2023):
Long-term sea-level variability along the coast of Japan during the 20th century revealed by a 1/10° OGCM.
Journal of Oceanography, 79, 123-143
https://doi.org/10.1007/s10872-022-00671-4Kawakami, Y., Nakano, H., Urakawa, L. S., Toyoda, T., Sakamoto, K., Yoshimura, H., Shindo, E., and Yamanaka, G. (2022):
Interactions between ocean and successive typhoons in the Kuroshio region in 2018 in atmosphere-ocean coupled model simulations.
Journal of Geophysical Research: oceans, 127, e2021JC018203
https://doi.org/10.1029/2021JC018203Kawakami, Y., Kojima, A., Murakami, K., Nakano, T., and Sugimoto S. (2022):
Temporal variations of net Kuroshio transport based on a repeated hydrographic section along 137°E.
Climate Dynamics, 59, 1703-1713
https://doi.org/10.1007/s00382-021-06061-8Toyoda, T., Sakamoto, K., Usui, N., Hirose, N., Tanaka, K., Katsumata, T., Takahashi, D., Niki, M., Kutsuwada, K., Miyama, T., Nakano, H., Urakawa, L. S., Komatsu, K. K., Kawakami, Y., and Yamanaka G. (2021):
Surface-layer circulations in Suruga Bay induced by intrusions of Kuroshio branch water.
Frontiers in Marine Science, 8, 721500
https://doi.org/10.3389/fmars.2021.721500Kawakami, Y., Kitamura, Y., Nakano, T., and Sugimoto, S. (2020):
Long‐term thermohaline variations in the North Pacific subtropical gyre from a repeat hydrographic section along 165°E.
Journal of Geophysical Research: oceans, 125, e2019JC015382
https://doi.org/10.1029/2019JC015382Kawakami, Y., Sugimoto, S., and Suga, T. (2016):
Inter-annual zonal shift of the formation region of the lighter variety of the North Pacific Central Mode Water.
Journal of Oceanography, 72, 225-234
https://doi.org/10.1007/s10872-015-0325-1
発表/講演 等
川上雄真：
北西太平洋上層の海洋循環・水塊の変動と変化に関する研究
2025年度日本海洋学会秋季大会, 函館, 2025年9月Kawakami, Y.：
Ocean current changes in the western North Pacific.
The Second International Scientific Symposium of the CSK-2*, Sendai, Nov. 2024
*CSK-2 : 2nd Cooperative Study of the Kuroshio and its Adjacent Regions川上雄真, 中野英之, 浦川昇吾, 豊田隆寛, 青木邦弘, 碓氷典久, 杉本周作：
北西太平洋の海流変動と海洋熱波.
2024年度日本海洋学会秋季大会, 東京, 2024年9月
川上雄真, 中野英之, 豊田隆寛, 坂本圭, 浦川昇吾, 杉本周作：
船舶観測, アルゴフロート, および数値モデルを用いた黒潮と水塊の時間変動の研究.
日本地球惑星科学連合2023年大会, 千葉, 2023年5月
競争的資金等の研究課題
海洋異常昇温と気候災害の統合的理解が示す北太平洋中緯度の「気候新常態」
科研費, 基盤研究 (B), 2026年4月ー2030年3月, 研究分担者黒潮大蛇行と海洋極端現象の過去・現在・未来： 予測可能性と海洋生物資源への影響
科研費, 学術変革領域研究 (A) ハビタブル日本, 計画研究, 2024年4月ー2029年3月, 研究分担者日本の沿岸湧昇の実態解明 ～熱収支解析を用いた大気・海洋変動の影響評価
科研費, 基盤研究 (C), 2024年4月ー2027年3月, 研究分担者黒潮海流系に対する大規模大気・海洋変動の影響評価
科研費, 研究活動スタート支援, 2021年8月ー2024年3月, 研究代表者
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