We provide new insights on the presence of oxygen-depleted waters along the Indonesian coasts of Sumatra and Java attributed to the eastward advection of the northern Indian Ocean waters and monsoon-driven upwelling. Combined in situ and reanalysis data elucidate the complex interplay of oceanographic processes responsible for the observed oxygen in the region. The knowledge is crucial for research and management strategies to mitigate deoxygenation impacts on marine ecosystems in Indonesia.

The JES is a mid-latitude “Miniature Ocean” featured by multiscale oceanic dynamical processes and sea ice, which strongly influence the JES SSC. However, the dominant factors that favor and/or restrict SSC and how they influence JES SSC on different time scales are not clear. In this study, these issues are investigated using EOF and PCA methods based on high-resolution satellite-derived SSC data provided by the Copernicus Marine Environment Monitoring Service (CMEMS).

The Korea Strait is a major navigation passage linking the Japan Sea to the East China Sea and Yellow Sea. This paper establishes a theoretical model for the tides in the Korea Strait and Japan Sea using the extended Taylor method. The model solution explains the formation mechanism of the tidal amphidromic systems in the Korea Strait, and why the K₁ amphidromic point is located farther away from the shelf break separating the Korea Strait and Japan Sea in comparison to the M₂ amphidromic point.

The resonant period of the Gulf of Thailand is potentially close to 1 day. However, the classic quarter-wavelength resonant theory fails to give a diurnal resonant period. In this study, we first perform a series of numerical experiments showing that the resonance of the South China Sea body has a critical impact on the resonance of the gulf. An idealised two-channel model that can reasonably explain the dynamics of the tidal resonance in the Gulf of Thailand is then established in this study.

Taylor's problem is a classical tidal dynamic problem and in its previous applications all of the studied basins had a closed end. In this study, the Taylor's method is extended so that it can also provide an analytical model for the M₂ tide in the Taiwan Strait (TS), which shows that the reflection of the southward wave at the abruptly deepened topography south of the TS is a major contribution to the formation of the northward propagating wave in the strait.