Abstract
To investigate the impact of current variations of the Oyashio on bottom pressure (BP) at observation stations PG1 (\(41.7040^{\circ }\hbox {N}\), \(144.4375^{\circ }\hbox {E}\)) and PG2 (\(42.2365^{\circ }\hbox {N}\), \(144.8454^{\circ }\hbox {E}\)), which are located in the onshore region of the Kuril Trench off Kushiro–Tokachi, altimetric sea surface height (SSH) and ocean bottom pressure (OBP) gauge data were evaluated. Two and a half years after El Niño, during 2007–2008 and 2012–2013, the Oyashio retreated toward the northeast in association with strong warm-core rings, which were inferred from SSH elevations at both stations. BP at PG1 near the offshore edge of the continental shelf is enhanced corresponding to the SSH elevations in a barotropic manner. Meanwhile, at PG2, BP remained relatively unchanged in spite of the high SSH variability because the main pycnocline adjusted rapidly to the SSH elevations. BP changes at PG1 caused by the northeastward retreat of the Oyashio cannot be neglected to detect BP change by crustal deformations.
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24 November 2019
In the original publication, the Fig. 2 was published incorrectly. The correct version (Fig. 2) is given in this correction. The original article has been corrected.
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Acknowledgements
The authors would like to thank Prof. D. Inazu (Tokyo University of Marine Science and Technology) and Dr. Y. Itoh (Kyoto Univerisity) for their insightful comments. The authors express gratitude to Ms. K. Taniguchi (JAMSTEC) for correcting the manuscript. Also, the authors are deeply grateful to the guest editor of this special issue and anonymous reviewers for helpful comments. This work was partly supported by the Japan Society for the Promotion of Science (JSPS), Grant-in-Aid for Scientific Research (15H04228, 15H02835, 17K05660).
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The original version of this article was revised: The Figure 2 is updated.
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Hasegawa, T., Nagano, A., Matsumoto, H. et al. El Niño-related sea surface elevation and ocean bottom pressure enhancement associated with the retreat of the Oyashio southeast of Hokkaido, Japan. Mar Geophys Res 40, 505–512 (2019). https://doi.org/10.1007/s11001-019-09392-8
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DOI: https://doi.org/10.1007/s11001-019-09392-8