Articles | Volume 20, issue 4
https://doi.org/10.5194/os-20-1013-2024
https://doi.org/10.5194/os-20-1013-2024
Research article
 | 
22 Aug 2024
Research article |  | 22 Aug 2024

Mechanisms and intraseasonal variability in the South Vietnam Upwelling, South China Sea: the role of circulation, tides, and rivers

Marine Herrmann, Thai To Duy, and Patrick Marsaleix

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Short summary
In summer, deep, cold waters rise to the surface along and off the Vietnamese coast. This upwelling of water lifts nutrients, inducing biological activity that is important for fishery resources. Strong tides occur on the shelf off the Mekong Delta. By increasing the mixing of ocean waters and modifying currents, they are a major factor in the development of upwelling on the shelf, accounting for ~75 % of its average summer intensity.