Current Dynamics and Water Column Stability in Indonesian Waters Based on Hydrodynamics Model

https://doi.org/10.22146/ijg.58091

Engki Andri Kisnarti(1*), Nining Sari Ningsih(2), Mutiara R Putri(3), Nani Hendriati(4)

(1) Faculty of Earth Sciences and Technology, Institute Technology of Bandung
(2) Faculty of Earth Sciences and Technology, Institute Technology of Bandung
(3) Faculty of Earth Sciences and Technology, Institute Technology of Bandung
(4) Coordinating Ministry for Maritime and Investment Affairs
(*) Corresponding Author

Abstract


Monsoon currents and Indonesian Throughflow (ITF) have an essential role in the current Indonesian water system. The movement of current/water masses with non-uniform bathymetric conditions will affect the water column's stability in Indonesian waters. Therefore, this study aims to obtain the current dynamics and stability of the water column in Indonesian waters, based on a hydrodynamic model termed the HAMburg Shelf Ocean Model (HAMSOM). The results of the model are data of current, temperature, salinity, and density. The data is used to study the dynamics of seawater in Indonesian waters. The water column's stability is examined by calculating the Brunt Väisälä frequency values (N2) based on the density data generated. The results show that monsoon currents were stronger in shallow waters because the stratification did not change. Meanwhile, the maximum N2 value occurs at the surface to a depth of 80-100 m with a range of 0.0000-0.0006 cycle s-1. The study also produces an understanding of the condition of Indonesia's stability (N2 positive), both spatially and temporally.


Keywords


Oceanography;Indonesian Journal of Geography

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DOI: https://doi.org/10.22146/ijg.58091

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Accredited Journal, Based on Decree of the Minister of Research, Technology and Higher Education, Republic of Indonesia Number 30/E/KPT/2018, Vol 50 No 1 the Year 2018 - Vol 54 No 2 the Year 2022

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