Ocean Science
Ocean Science
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Articles | Volume 22, issue 4
Articles | Volume 22, issue 4
https://doi.org/10.5194/os-22-2449-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-22-2449-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 4
Research article
 | 
17 Aug 2026
Research article |  | 17 Aug 2026

Intraseasonal variability and eddy-induced structural modulation of the North Pacific intermediate water revealed by multi-mooring observations

Qiang Ren, Yansong Liu, Yansheng Zhang, Shumin Tu, Wei Huang, Feng Nan, Ran Wang, Xinyuan Diao, Jianfeng Wang, Xinchuang Liu, Zifei Chen, and Fei Yu

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Short summary
This study reveals how mesoscale eddies modulate the North Pacific Intermediate Water (NPIW) using three long-term mooring observations. By introducing “intermediate water thickness” as a new structural indicator, it shows that eddies compress or expand the NPIW layer, producing 60–80-day intraseasonal variability. Thickness and salinity are strongly inversely related, providing the first quantitative evidence of eddy-induced structural changes in mid-depth waters.
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