2017年8月に発生した黒潮大蛇行の黒潮流路と日本南岸の潮位変動

2017年8月に発生した黒潮大蛇行について,大蛇行に伴う日本南岸の潮位変動と,その黒潮流路との関係を調べた。海況による潮位変化は,観測潮位偏差から気象要因の変化量を差し引いて求めた。大蛇行流路が安定した2018年以降,東海地方の沿岸地点では海況による潮位の上昇が見られた。大蛇行期間の2018~2023年と非大蛇行期間の2011~2016年の6年平均の差は,浦神~内浦の8地点で大蛇行期間の方が3~5 cm高かった。コンポジット解析やEOF解析の結果から,大蛇行期間中に潮位が上昇する海域は東海沖の黒潮流路によって異なることが分かり,3つのパターンを確認できた。①黒潮が伊豆半島から房総半島に接近して...

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Published in海の研究 Vol. 34; no. 3; pp. 81 - 98
Main Authors 吉田, 久美, 碓氷, 典久, 井上, 博敬
Format Journal Article
LanguageJapanese
Published 日本海洋学会 15.05.2025
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ISSN0916-8362
2186-3105
DOI10.5928/kaiyou.34.3_81

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Abstract 2017年8月に発生した黒潮大蛇行について,大蛇行に伴う日本南岸の潮位変動と,その黒潮流路との関係を調べた。海況による潮位変化は,観測潮位偏差から気象要因の変化量を差し引いて求めた。大蛇行流路が安定した2018年以降,東海地方の沿岸地点では海況による潮位の上昇が見られた。大蛇行期間の2018~2023年と非大蛇行期間の2011~2016年の6年平均の差は,浦神~内浦の8地点で大蛇行期間の方が3~5 cm高かった。コンポジット解析やEOF解析の結果から,大蛇行期間中に潮位が上昇する海域は東海沖の黒潮流路によって異なることが分かり,3つのパターンを確認できた。①黒潮が伊豆半島から房総半島に接近している場合は東海以西で潮位が上昇しやすい。②東海沖で黒潮から分かれた西向きの流れが見られる場合は浦神以東の東海沿岸で潮位が上昇しやすい。③黒潮が紀伊半島の東側に接近して東海沖でS字型の流路をとる場合は尾鷲以西で潮位が上昇しやすい。②と③のパターンは,黒潮大蛇行時でも紀伊半島の東西で潮位変動に違いが見られる要因となる。
AbstractList 2017年8月に発生した黒潮大蛇行について,大蛇行に伴う日本南岸の潮位変動と,その黒潮流路との関係を調べた。海況による潮位変化は,観測潮位偏差から気象要因の変化量を差し引いて求めた。大蛇行流路が安定した2018年以降,東海地方の沿岸地点では海況による潮位の上昇が見られた。大蛇行期間の2018~2023年と非大蛇行期間の2011~2016年の6年平均の差は,浦神~内浦の8地点で大蛇行期間の方が3~5 cm高かった。コンポジット解析やEOF解析の結果から,大蛇行期間中に潮位が上昇する海域は東海沖の黒潮流路によって異なることが分かり,3つのパターンを確認できた。①黒潮が伊豆半島から房総半島に接近している場合は東海以西で潮位が上昇しやすい。②東海沖で黒潮から分かれた西向きの流れが見られる場合は浦神以東の東海沿岸で潮位が上昇しやすい。③黒潮が紀伊半島の東側に接近して東海沖でS字型の流路をとる場合は尾鷲以西で潮位が上昇しやすい。②と③のパターンは,黒潮大蛇行時でも紀伊半島の東西で潮位変動に違いが見られる要因となる。
Author 吉田, 久美
井上, 博敬
碓氷, 典久
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  fullname: 井上, 博敬
  organization: 気象庁大気海洋部
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Oka, E., S. Sugimoto, F. Kobashi, H. Nishikawa, S. Kanada, T. Nasuno, R. Kawamura, and M. Nonaka (2023): Subtropical Mode Water south of Japan impacts typhoon intensity. Sci. Adv., 9, eadi2793.
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Usui, N., H. Tsujino, H. Nakano, and S. Matsumoto (2013): Long-term variability of the Kuroshio path south of Japan. J. Oceanogr., 69, 647-670.
Qiu, B., S. Chen, and E. Oka (2023): Why did the 2017 Kuroshio large meander event become the longest in the past 70 years? Geophys. Res. Lett. 50, e2023GL103548.
Kawabe, M. (1987): Spectral properties of sea level and time scales of Kuroshio path variations. J. Oceanogr. Soc. Jpn., 43, 111-123.
Nagano, A., and M. Kawabe (2004): Monitoring of generation and propagation of the Kuroshio small meander using sea level data along the southern coast of Japan. J. Oceanogr., 60, 879-892.
松本孝治(1985):黒潮流路の蛇行状態と黒潮内側反流.水産海洋研究会報,49,52-54
関根義彦・伊藤徹・藤田弘一(1991):紀伊半島東部域への暖水の接近について.沿岸海洋研究ノート,28,174-182
吉田隆・下平保直・林王弘道・横内克巳・秋山秀樹(2006):黒潮の流路情報をもとに黒潮大蛇行を判定する基準.海の研究,15,499-507
Usui, N., and K. Ogawa (2022): Sea level variability along the Japanese coast forced by the Kuroshio and its extension. J. Oceanogr., 78, 515-527.
Kawabe, M. (1995): Variations of current path, velocity, and volume transport of the Kuroshio in relation with the large meander. J. Phys. Oceanogr., 25, 3103-3117.
杉本悟史・吉田久美(2005):日本近海における表層水温の長期変動―海面水位と長期変動の関係―.測候時報,72,特別号,S17-S26
Kawabe, M. (1980): Sea level variations along the south coast of Japan and the large meander in the Kuroshio. J. Oceanogr. Soc. Jpn., 36, 97-104.
Kawabe, M. (1986): Transition processes between the three typical paths of the Kuroshio. J. Oceanogr. Soc. Jpn., 42, 174-191.
Sasaki, Y.N., S. Minobe, and Y. Miura (2014): Decadal sea-level variability along the coast of Japan in response to ocean circulation changes. J. Geophys. Res., 119, 266-275.
Ito, D., Y. Shimizu, T. Setou, A. Kusaka, D. Ambe, Y. Hiroe, K. Hidaka, S. Sogawa, and T. Yamaguchi (2024): Temporal variation of the 2017 Kuroshio large meander based on repeated surveys along 138°E. J. Oceanogr., 80, 197-217.
Sugimoto, S., B. Qiu, and N. Schneider (2021): Local atmospheric response to the Kuroshio Large Meander path in summer and its remote influence on the climate of Japan. J. Climate, 34, 3571-3589.
Senjyu, T., M. Matsuyama, and N. Matsubara (1999): Interannual and decadal sea-level variations along the Japanese coast. J. Oceanogr., 55, 619-633.
Sugimoto, S., B. Qiu, and A. Kojima (2020): Marked coastal warming off Tokai attributable to Kuroshio large meander. J. Oceanogr., 76, 141-154.
Nagano, A., Y. Yamashita, K. Ariyoshi, T. Hasegawa, H. Matsumoto, and M. Shinohara (2021): Seafloor pressure change excited at the northwest corner of the Shikoku Basin by the formation of the Kuroshio large-meander in September 2017. Front. Earth Sci., 8, 583481.
Nakamura, H., A. Nishina, and S. Minobe (2012): Response of storm tracks to bimodal Kuroshio path states south of Japan. J. Climate, 25, 7772-7779.
Taft, B. (1972): Characteristics of the flow of the Kuroshio south of Japan. In: Yoshida K, Stommel H (eds) Kuroshio-Its Physical Aspects, University of Tokyo Press, Tokyo, pp 165-216.
Nagano, A., Y. Yamashita., and T. Hasegawa (2019): Characteristics of an atypical large-meander path of the Kuroshio current south of Japan formed in September 2017. Mar. Geophys. Res., 40, 525-539.
海上保安庁(1977,1978): 海洋速報&海流推測図バックナンバー(1977年海洋速報第24号~1978年海洋速報第8号).https://www1.kaiho.mlit.go.jp/KANKYO/KAIYO/qboc/backnumber.html(最終アクセス:2024/12/21)
Usui N., K. Ogawa, K. Sakamoto, H. Tsujino, G. Yamanaka, T. Kuragano, and M. Kamachi (2021): Unusually high sea level at the south coast of Japan in September 2011 induced by the Kuroshio. J. Oceanogr., 77, 447-461.
気象庁(2014):気象庁HP海洋の健康診断表「黒潮の数か月から十年規模の変動(流路)」.https://www.data.jma.go.jp/kaiyou/data/db/kaikyo/archive/b_2/kuroshio_stream/2013/kuroshio_stream.html(最終アクセス:2024/12/21)
日下彰・櫻井正輝・山田和也・竹尻浩平・後藤直登・伊與田慎右・石川陽子・陶山公彦・丸山拓也・中野哲規・上原陽平・岸香緒里・東元俊光・今泉洋介・大畑聡・大森健策・瀬藤聡(2021):黒潮大蛇行に伴う海況変化が本州太平洋沿岸域の水産業へ及ぼす影響. 黒潮の資源海洋研究,22,1-5
吉田昭三(1964):近年における黒潮について.水産研究会報,5,66-69
Zhang, Z., and K. Ichikawa (2005): Influence of the Kuroshio fluctuations on sea level variations along the south coast of Japan. J. Oceanogr., 61, 979-985.
Hirose, N., N. Usui, K. Sakamoto, H. Tsujino, G. Yamanaka, H. Nakano, S. Urakawa, T. Toyoda, Y. Fujii, and N. Kohno (2019): Development of a new operational system for monitoring and forecasting coastal and open-ocean states around Japan. Ocean Dyn., 69, 1333-1357.
Nagano, A., and M. Kawabe (2005): Coastal disturbance in sea level propagating along the south coast of Japan and its impact on the Kuroshio. J. Oceanogr., 61, 885-903.
Japan Meteorological Agency(2024): Outline of the Operational Numerical Weather Prediction at the Japan Meteorological Agency. https://www.jma.go.jp/jma/jma-eng/jma-center/nwp/outline2024-nwp/index.htm(最終アクセス:2024/12/21)
気象庁・海上保安庁(2022):報道発表「黒潮大蛇行の継続期間が過去最長に」.https://www.jma.go.jp/jma/press/2205/25a/20220525_kuroshio_daidakou.pdf(最終アクセス:2024/12/21)
Tochimoto, E., and S. Iizuka (2022): Impact of warm sea surface temperature over a Kuroshio large meander on extreme heavy rainfall caused by an extratropical cyclone. Atmos. Sci. Lett., 24, e1135.
References_xml – reference: Kawabe, M. (1995): Variations of current path, velocity, and volume transport of the Kuroshio in relation with the large meander. J. Phys. Oceanogr., 25, 3103-3117.
– reference: 日下彰・櫻井正輝・山田和也・竹尻浩平・後藤直登・伊與田慎右・石川陽子・陶山公彦・丸山拓也・中野哲規・上原陽平・岸香緒里・東元俊光・今泉洋介・大畑聡・大森健策・瀬藤聡(2021):黒潮大蛇行に伴う海況変化が本州太平洋沿岸域の水産業へ及ぼす影響. 黒潮の資源海洋研究,22,1-5.
– reference: Kawabe, M. (1986): Transition processes between the three typical paths of the Kuroshio. J. Oceanogr. Soc. Jpn., 42, 174-191.
– reference: 海上保安庁(1977,1978): 海洋速報&海流推測図バックナンバー(1977年海洋速報第24号~1978年海洋速報第8号).https://www1.kaiho.mlit.go.jp/KANKYO/KAIYO/qboc/backnumber.html(最終アクセス:2024/12/21)
– reference: Nagano, A., and M. Kawabe (2005): Coastal disturbance in sea level propagating along the south coast of Japan and its impact on the Kuroshio. J. Oceanogr., 61, 885-903.
– reference: 関根義彦・伊藤徹・藤田弘一(1991):紀伊半島東部域への暖水の接近について.沿岸海洋研究ノート,28,174-182.
– reference: 気象庁(2020):日本沿岸の平均海面水位は,1980年以降,上昇傾向にある.日本の気候変動 2020(本編),p. 29.
– reference: Japan Meteorological Agency(2024): Outline of the Operational Numerical Weather Prediction at the Japan Meteorological Agency. https://www.jma.go.jp/jma/jma-eng/jma-center/nwp/outline2024-nwp/index.htm(最終アクセス:2024/12/21)
– reference: Zhang, Z., and K. Ichikawa (2005): Influence of the Kuroshio fluctuations on sea level variations along the south coast of Japan. J. Oceanogr., 61, 979-985.
– reference: 気象庁・海上保安庁(2022):報道発表「黒潮大蛇行の継続期間が過去最長に」.https://www.jma.go.jp/jma/press/2205/25a/20220525_kuroshio_daidakou.pdf(最終アクセス:2024/12/21)
– reference: 気象庁(2019):令和元年東日本台風(台風第19号)による大雨,暴風等 令和元年(2019年)10月10日~10月13日(速報).https://www.data.jma.go.jp/obd/stats/data/bosai/report/2019/20191012/20191012.html(最終アクセス:2024/12/21)
– reference: Tochimoto, E., and S. Iizuka (2022): Impact of warm sea surface temperature over a Kuroshio large meander on extreme heavy rainfall caused by an extratropical cyclone. Atmos. Sci. Lett., 24, e1135.
– reference: Qiu, B., S. Chen, and E. Oka (2023): Why did the 2017 Kuroshio large meander event become the longest in the past 70 years? Geophys. Res. Lett. 50, e2023GL103548.
– reference: Taft, B. (1972): Characteristics of the flow of the Kuroshio south of Japan. In: Yoshida K, Stommel H (eds) Kuroshio-Its Physical Aspects, University of Tokyo Press, Tokyo, pp 165-216.
– reference: Kawabe, M. (1985): Sea level variations at the Izu Islands and typical stable paths of the Kuroshio. J. Oceanogr. Soc. Jpn., 41, 307-326.
– reference: Kawabe, M. (1980): Sea level variations along the south coast of Japan and the large meander in the Kuroshio. J. Oceanogr. Soc. Jpn., 36, 97-104.
– reference: Sugimoto, S., B. Qiu, and A. Kojima (2020): Marked coastal warming off Tokai attributable to Kuroshio large meander. J. Oceanogr., 76, 141-154.
– reference: Sekine, Y., and K. Fujita (1999): Why does the sea level difference between Kushimoto and Uragami show periods of large meander and non-large meander paths of the Kuroshio south of Japan? J. Oceanogr., 55, 43-51.
– reference: Kawabe, M. (1987): Spectral properties of sea level and time scales of Kuroshio path variations. J. Oceanogr. Soc. Jpn., 43, 111-123.
– reference: Senjyu, T., M. Matsuyama, and N. Matsubara (1999): Interannual and decadal sea-level variations along the Japanese coast. J. Oceanogr., 55, 619-633.
– reference: Usui, N., H. Tsujino, H. Nakano, and S. Matsumoto (2013): Long-term variability of the Kuroshio path south of Japan. J. Oceanogr., 69, 647-670.
– reference: 松本孝治(1985):黒潮流路の蛇行状態と黒潮内側反流.水産海洋研究会報,49,52-54.
– reference: Nagano, A., and M. Kawabe (2004): Monitoring of generation and propagation of the Kuroshio small meander using sea level data along the southern coast of Japan. J. Oceanogr., 60, 879-892.
– reference: Nagano, A., Y. Yamashita, K. Ariyoshi, T. Hasegawa, H. Matsumoto, and M. Shinohara (2021): Seafloor pressure change excited at the northwest corner of the Shikoku Basin by the formation of the Kuroshio large-meander in September 2017. Front. Earth Sci., 8, 583481.
– reference: Nakamura, H., A. Nishina, and S. Minobe (2012): Response of storm tracks to bimodal Kuroshio path states south of Japan. J. Climate, 25, 7772-7779.
– reference: Sugimoto, S., B. Qiu, and N. Schneider (2021): Local atmospheric response to the Kuroshio Large Meander path in summer and its remote influence on the climate of Japan. J. Climate, 34, 3571-3589.
– reference: Usui N., K. Ogawa, K. Sakamoto, H. Tsujino, G. Yamanaka, T. Kuragano, and M. Kamachi (2021): Unusually high sea level at the south coast of Japan in September 2011 induced by the Kuroshio. J. Oceanogr., 77, 447-461.
– reference: 吉田昭三(1964):近年における黒潮について.水産研究会報,5,66-69.
– reference: Ito, D., Y. Shimizu, T. Setou, A. Kusaka, D. Ambe, Y. Hiroe, K. Hidaka, S. Sogawa, and T. Yamaguchi (2024): Temporal variation of the 2017 Kuroshio large meander based on repeated surveys along 138°E. J. Oceanogr., 80, 197-217.
– reference: Nagano, A., Y. Yamashita., and T. Hasegawa (2019): Characteristics of an atypical large-meander path of the Kuroshio current south of Japan formed in September 2017. Mar. Geophys. Res., 40, 525-539.
– reference: Oka, E., S. Sugimoto, F. Kobashi, H. Nishikawa, S. Kanada, T. Nasuno, R. Kawamura, and M. Nonaka (2023): Subtropical Mode Water south of Japan impacts typhoon intensity. Sci. Adv., 9, eadi2793.
– reference: Shoji, D. (1972): Time variation of the Kuroshio south of Japan. In: Yoshida K, Stommel H (eds) Kuroshio-Its physical aspects, University of Tokyo Press, Tokyo, pp 217-234.
– reference: 吉田隆・下平保直・林王弘道・横内克巳・秋山秀樹(2006):黒潮の流路情報をもとに黒潮大蛇行を判定する基準.海の研究,15,499-507.
– reference: 気象庁(2024):気象庁HP海洋の健康診断表「黒潮の数か月から十年規模の変動(流路)」.https://www.data.jma.go.jp/kaiyou/data/shindan/b_2/kuroshio_stream/kuroshio_stream.html(最終アクセス:2024/12/21)
– reference: 杉本悟史・吉田久美(2005):日本近海における表層水温の長期変動―海面水位と長期変動の関係―.測候時報,72,特別号,S17-S26.
– reference: Sasaki, Y.N., S. Minobe, and Y. Miura (2014): Decadal sea-level variability along the coast of Japan in response to ocean circulation changes. J. Geophys. Res., 119, 266-275.
– reference: Usui, N., and K. Ogawa (2022): Sea level variability along the Japanese coast forced by the Kuroshio and its extension. J. Oceanogr., 78, 515-527.
– reference: Hirose, N., N. Usui, K. Sakamoto, H. Tsujino, G. Yamanaka, H. Nakano, S. Urakawa, T. Toyoda, Y. Fujii, and N. Kohno (2019): Development of a new operational system for monitoring and forecasting coastal and open-ocean states around Japan. Ocean Dyn., 69, 1333-1357.
– reference: 気象庁(2014):気象庁HP海洋の健康診断表「黒潮の数か月から十年規模の変動(流路)」.https://www.data.jma.go.jp/kaiyou/data/db/kaikyo/archive/b_2/kuroshio_stream/2013/kuroshio_stream.html(最終アクセス:2024/12/21)
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StartPage 81
SubjectTerms 海面水位
潮位変動
黒潮大蛇行
黒潮流路
Title 2017年8月に発生した黒潮大蛇行の黒潮流路と日本南岸の潮位変動
URI https://www.jstage.jst.go.jp/article/kaiyou/34/3/34_81/_article/-char/ja
Volume 34
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ispartofPNX 海の研究, 2025/05/15, Vol.34(3), pp.81-98
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