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

Herrmann, Marine; To Duy, Thai; Marsaleix, Patrick

doi:https://doi.org/10.5194/os-20-1013-2024

Articles | Volume 20, issue 4

https://doi.org/10.5194/os-20-1013-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/os-20-1013-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 20, issue 4

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

Data sets

Daily surface temperature from three sensitivity ensembles of June-September 2018 and tridimensional temperature, salinity and currents on 16 and 31 July 2018 over the South China Sea M. Herrmann and T. To Duy https://doi.org/10.5281/zenodo.10626112

High-resolution configuration of the hydrodynamical ocean model SYMPHONIE (version 2.4) over the South China Sea N. B. Trinh et al. https://doi.org/10.5281/zenodo.7941495

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.