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All Journal DIFFRACTION: Journal for Physics Education and Applied Physics Majalah Ilmiah METHODA
Sabrina, Purwanti Lelly
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Agriculture, Biological Sciences & Forestry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Medicine & Pharmacology Physics Public Health Social Sciences

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KARAKTERISTIK FISIS TELUK AMBON MENGGUNAKAN PEMODELAN HIDRODINAMIKA 3 DIMENSI Sabrina, Purwanti Lelly
Majalah Ilmiah METHODA Vol. 13 No. 1 (2023): Majalah Ilmiah METHODA
Publisher : Universitas Methodist Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46880/methoda.Vol13No1.pp11-21

Abstract

Outer Ambon Bay (TAL) and Inner Ambon Bay (TAD) are part of Ambon Bay, which are semi-enclosed waters bounded by a narrow threshold. The characteristics of TAL are strongly influenced by the condition of the Banda Sea waters. Physical characteristics in the Banda Sea are influenced by the phenomenon of upwelling during the southeast season which brings water masses with high salinity and low temperature into the TAL. The condition of Ambon Bay is also influenced by the density gradient and tidal upwelling phenomenon. A 3-dimensional hydrodynamic modeling simulation was conducted to see the tidal upwelling phenomenon that affects the physical dynamics in Ambon Bay. The model simulation time was adjusted to the southeast season, namely June 1 - October 31, 2015. Comparison of simulated tidal elevation values with observation data showed a Root Mean Square Error (RMSE) value of 0.11 m with a correlation coefficient of 94.3%. The distribution of water temperature from the model simulation shows the same value as the satellite image data, which is 26°C.
KARAKTERISTIK FISIS TELUK AMBON MENGGUNAKAN PEMODELAN HIDRODINAMIKA 3 DIMENSI Sabrina, Purwanti Lelly
Majalah Ilmiah METHODA Vol. 13 No. 1 (2023): Majalah Ilmiah METHODA
Publisher : Universitas Methodist Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Outer Ambon Bay (TAL) and Inner Ambon Bay (TAD) are part of Ambon Bay, which are semi-enclosed waters bounded by a narrow threshold. The characteristics of TAL are strongly influenced by the condition of the Banda Sea waters. Physical characteristics in the Banda Sea are influenced by the phenomenon of upwelling during the southeast season which brings water masses with high salinity and low temperature into the TAL. The condition of Ambon Bay is also influenced by the density gradient and tidal upwelling phenomenon. A 3-dimensional hydrodynamic modeling simulation was conducted to see the tidal upwelling phenomenon that affects the physical dynamics in Ambon Bay. The model simulation time was adjusted to the southeast season, namely June 1 - October 31, 2015. Comparison of simulated tidal elevation values with observation data showed a Root Mean Square Error (RMSE) value of 0.11 m with a correlation coefficient of 94.3%. The distribution of water temperature from the model simulation shows the same value as the satellite image data, which is 26°C.
Respon Meteorologi dan Oseanografi Perairan Indo-Pasifik terhadap Kejadian Multi Siklon Tropis pada November–Desember 2021 Sabrina, Purwanti Lelly; Ramadani, Rizki; Darmawan, Yahya
DIFFRACTION: Journal for Physics Education and Applied Physics Vol 7, No 2 (2025)
Publisher : Pendidikan Fisika, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37058/diffraction.v7i2.17887

Abstract

Indonesia tidak mengalami kondisi siklon tropis secara langsung, namun sering terdampak oleh siklon tropis yang terjadi di Samudera Hindia dan Samudera Pasifik. Hal ini mempengaruhi kondisi atmosfer dan oseanografi seperti angin, curah hujan, gelombang, dan suhu permukaan laut. Penelitian ini bertujuan untuk menganalisis karakteristik kondisi meteorologi dan oseanografi pada fase bibit dan siklon tropis yang terjadi pada periode November – Desember 2021 serta kaitannya dengan variabilitas iklim regional dan global. Terdapat 4 kejadian yaitu siklon tropis Paddy, Nyatoh, bibit siklon 94 W dan 95 S. Hasil menunjukkan bahwa kecepatan angin selama kejadian siklon tropis berkisar antara 15 – 29 m/s dengan tinggi gelombang 2,5 – 5 m. Siklon tropis mempengaruhi peningkatan curah hujan beberapa waktu setelah kejadian, dengan curah hujan maksimum mencapai 106 mm/hari pada Siklon Tropis Nyatoh. Indeks ENSO 3.4 menunjukkan kondisi La Niña kuat pada periode penelitian, sementara indeks IOD berada pada fase netral. Suhu permukaan laut di Samudera Pasifik dan perairan Indonesia berkisar 24 – 32 °C, sedangkan di Samudera Hindia 24 – 30 °C. Hasil penelitian ini diharapkan dapat menjadi dasar dalam peningkatan pemahaman dampak siklon tropis terhadap laut – atmosfer Indonesia, serta mendukung upaya mitigasi dan peringatan dini bencana hidrometeorologi.
Co-Authors Rizki Ramadani Yahya Darmawan