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All Journal Jurnal Ekologi, Masyarakat dan Sains Journal of Coastal and Ocean Sciences JURNAL SAINS DAN TEKNOLOGI PERIKANAN (JIKAN) Indonesian Journal of Oceanography Dedication : Jurnal Pengabdian Masyarakat Jurnal Kelautan dan Perikanan Indonesia
Sari, Ratna Juita
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Earth & Planetary Sciences Engineering Environmental Science Immunology & microbiology Physics Social Sciences Veterinary Other

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Journal : JURNAL SAINS DAN TEKNOLOGI PERIKANAN (JIKAN)

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Variability of Sound Speed Profile in the Banda Sea During West and East Monsoon Sari, Ratna Juita; Yuliardi, Amir Yarkhasy; Nugroho, Agung Tri; Rahmalia, Diah Ayu; Manik, Agustina Sartika Yos Ekaristi
Jurnal Sains dan Teknologi Perikanan Vol 5 No 2 (2025): OKTOBER
Publisher : Fisheries Science Study Program, Faculty of Science and Technology, Muhammadiyah University of Sidenreng Rappang.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55678/jikan.v5i2.2296

Abstract

Sound speed in the ocean is a key parameter for underwater acoustic applications, such as communication, navigation, and sonar systems. Sound speed is influenced by temperature, salinity, and pressure, making it highly sensitive to seasonal oceanographic dynamics. Although the Banda Sea is recognized as one of the strongest upwelling centers in Indonesia, studies specifically addressing the seasonal variability of sound speed profiles in this region remain limited. This study aims to analyze the differences in temperature, salinity, and sound speed characteristics between the west and east monsoon periods in the Banda Sea. Monthly temperature and salinity data for 2023 from the Copernicus Marine Environment Monitoring Service (CMEMS) with a spatial resolution of 0.083° × 0.083° were processed using Ocean Data View (ODV). Sound speed was analyzed in terms of its horizontal and vertical distributions at depths of 0, 150, and 300 m, as well as vertical profiles down to 500 m. During the west monsoon (January), surface temperature was higher (29.5–31 °C) and sound speed reached maximum values (1543–1546 m/s), with a deeper thermocline due to downwelling. In contrast, during the east monsoon (July), surface temperature was lower (26.5–28.5 °C), the halocline was shallower (34.7–35.2 PSU at 50–150 m), and surface sound speed decreased (1538–1541 m/s), reflecting seasonal upwelling. Minimum sound speed was consistently observed at 300–500 m (1496–1505 m/s). These findings highlight temperature as the dominant factor controlling sound speed, with important implications for the planning of underwater acoustic operations in eastern Indonesian waters.
Co-Authors Amir Yarkhasy Yuliardi Firdaus, Randi herlani, tanti Hidayah, Intan Nur Luhur Moekti Prayogo Manik, Agustina Sartika Yos Ekaristi Napitupulu, Gandhi Nugroho, Agung Tri Pujiyanto , M Aris Rachman, Herlambang Aulia Rahmalia, Diah Ayu Septy Heltria Setyorini, Fitri Adi SUGENG HARTONO, SUGENG