Perbandingan Data Pasang Surut, Arus, dan Angin dengan Prediksi pada Musim Peralihan Kedua di Laut Timor Tahun 2023

Comparison Between Tide, Current, and Wind Data with Prediction During Second Monsoon Transition in Timor Sea 2023

Authors

  • Candrasa Surya Dharma Pushidrosal
  • Mr. Deirus Pusat Hidro-Oseanografi TNI Angkatan Laut
  • Mr. Alin Pusat Hidro-Oseanografi TNI Angkatan Laut
  • Mr. Affan Pusat Hidro-Oseanografi TNI Angkatan Laut
  • Mr. Nawanto Pusat Hidro-Oseanografi TNI Angkatan Laut
  • Mr. Arochim Pusat Hidro-Oseanografi TNI Angkatan Laut
  • Mr. Tomy Ronaldy Pusat Hidro-Oseanografi TNI Angkatan Laut
  • Mr. Dedi Badan Keamanan Laut Republik Indonesia
  • Mr. Pranowo Badan Riset dan Inovasi Nasional, Republik Indonesia https://orcid.org/0000-0002-5798-4181
  • Mr. Sandy Herho Department of Earth and Planetary Sciences, University of California https://orcid.org/0000-0001-8330-2095
  • Mr. Yusron Sekolah Tinggi Teknik Angkatan Laut
  • Mr. Furqon Badan Meteorologi Klimatologi dan Geofisika https://orcid.org/0000-0002-4903-037X
  • Mr. Akhmad Fahim Badan Meteorologi Klimatologi dan Geofisika
  • Mr. Andika Departemen Geofisika, FMIPA, Universitas Hasanuddin https://orcid.org/0000-0003-0373-7254
  • Mr. Sigit Pusat Hidro-Oseanografi TNI Angkatan Laut

DOI:

https://doi.org/10.62703/jhi.v7i1.156

Keywords:

ITF, Arus Permukaan, ADCP, Angin, CTD

Abstract

Laut Timor memiliki peran geostrategis yang sangat tinggi bagi negara Indonesia dan Australia. Latihan survey bersama perdana antara kedua negara diberi nama Coordinated Hydrography Survey Exercise (CHSE) diselenggarakan pada tahun 2023. CHSE dilaksanakan dengan menggerakkan kapal riset perang KRI Spica milik TNI-AL Indonesia dan HMS Leeuwin milik Royal Navy Australia, yang masing-masing melakukan survey hidro-oseanografi dan meteorologi di wilayah teritorialnya. Data arus dan angin dari hasil survey kemudian dibandingkan dengan data sekunder Copernicus, sedangkan untuk data angin terhadap prediksi BMKG. Tidak terjadi kemunculan siklon selama kegiatan latihan, Kondisi batimetri di Perairan Laut Timor dalam penelitian ini bervariasi dari kedalaman 16,8 s.d. 218,7meter, dengan luas area sebesar 302NM2. Sirkulasi arus diukur menggunakan underway vessel mounted ADCP hingga kedalaman 40 meter, dengan interval rekaman data bervariasi antara 1 menit sampai 45 menit. Selain itu dipasang pula fix mooring current meter pada satu stasiun tetap. Hasil pengukuran menunjukkan pola sirkulasi arus dominan bergerak antara Timur Laut dan Barat Daya, dengan pola keseragaman secara vertikal. Kecepatan arus maksimum 0,273m/s, dan minimum 0,005m/s ke arah Barat Daya. Hal ini sejalan dengan data klimatologis yang menunjukkan pola arus dominan menuju ke Barat Daya dengan kecepatan 0,1 – 0,5 knot. Pola sirkulasi tersebut menunjukkan bahwa Laut Timor dipengaruhi oleh Indonesian Throughflow (ITF), dengan 30% dari variabilitasnya dipengaruhi oleh siklus musiman dari angin monsoon. Laut Timor, pada lapisan kolom airnya, mendapatkan pengaruh lokal dari gelombang kelvin pada kedalaman di bawah 600 meter, dilapisan yang lebih dangkal, arus dibangkitkan oleh kopling siklus gaya pasang surut diurnal dari Laut Banda, semidiurnal dari Samudera Hindia, dan siklus musiman dari gaya angin monsoon.

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Published

2025-06-10

How to Cite

Dharma, C. S., Rizki Khair, D., Abimanyu, A., Fadhilah, A., Budi Sukoco, N., Arochim, … Cahyono, S. (2025). Perbandingan Data Pasang Surut, Arus, dan Angin dengan Prediksi pada Musim Peralihan Kedua di Laut Timor Tahun 2023: Comparison Between Tide, Current, and Wind Data with Prediction During Second Monsoon Transition in Timor Sea 2023. Jurnal Hidrografi Indonesia, 7(1), 9–24. https://doi.org/10.62703/jhi.v7i1.156

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