Effects of tides on the cross-isobath movement of the low-salinity plume in the western Yellow and East China Seas in winter

Bin Wang, Naoki Hirose, Dongliang Yuan, Jae Hong Moon, Xishan Pan

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Offshore extension of the fresh Subei coast water is identified in winter based on in site salinity observation data in this and previous studies. A high-resolution regional ocean circulation model is used to investigate the cross-isobath movement of low salinity-water over the Yellow and East China Seas, and it has reproduced the salinity distribution observed in the winter of 2014–2015 successfully. The model suggests that the low-salinity water is basically degenerated back to the eastern coast of China in winter because of strong northeasterly wind. However, a part of the low-salinity water extends offshore in the southeast direction across the 20–50 m isobaths over the Yangtze Bank, which cannot be explained by either the northerly winter monsoon or the Changjiang discharge. Numerical experiments suggest that the cross-isobath transport of the soluble substances is highly attributed to the tidal residual current, flowing southeastward across 20–50 m isobaths over the whole Yangtze Bank. The results of controlled experiments also indicate that the bottom shear of the tidal current, rather than the tidal mixing, plays a significant role in the cross-isobath current during winter.

Original languageEnglish
Pages (from-to)228-239
Number of pages12
JournalContinental Shelf Research
Volume143
DOIs
Publication statusPublished - Jul 1 2017

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Aquatic Science
  • Geology

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