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All Journal DIFFRACTION: Journal for Physics Education and Applied Physics SRIWIJAYA JOURNAL OF ENVIRONMENT Majalah Ilmiah METHODA Geosains Kutai Basin
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 Energy 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.
The Effect Of Triple Dip La Niña On Rainfall In Lombok During 2020–2023 Rohman, Muhammad Faisal; Sabrina, Purwanti Lelly; Avrionesti, Avrionesti
Sriwijaya Journal of Environment Vol 10, No 3 (2025): ENVIRONMENTAL ENGINEERING
Publisher : Program Pascasarjana Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22135/sje.2025.10.3.191-205

Abstract

Triple Dip La Niña is a term that describes the La Niña phenomenon that lasts for 3 consecutive years. History records that this phenomenon last occurred in 1973–1976 and 1998–2001 which influenced the regional weather system through the mechanism of atmosphere-ocean interaction, one of which was in Lombok. This study was conducted to analyze the impact of the emergence of the Triple Dip La Niña phenomenon on rainfall variability in Lombok from 2020 to 2023, as well as to test the correlation of the ENSO relationship indicated by the ONI (Oceanic Niño Index) indicator with rainfall variables. The data used in this study were monthly rainfall data from 55 rain posts and ONI data from NOAA. The results showed that the influence of Triple Dip La Niña on rainfall variability was observed most significantly in the dry season (JJA) with an increase in rainfall >100%. A strong relationship between the ONI index and rainfall was identified in Senaru, Bayan, Janapria, and Pringgabaya.
Simulation of Storm Surge Generated by Tropical Cyclone Senyar in the Strait of Malacca Using the ADCIRC Model Amanu, Rendy Syahril; Sabrina, Purwanti Lelly; Avrionesti; Amri, Sayful
GEOSAINS KUTAI BASIN Vol. 9 No. 2 (2026)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/561wve82

Abstract

Tropical Cyclone (TC) Senyar, which formed over the Strait of Malacca in late November 2025, represents a relatively rare meteorological phenomenon in the near-equatorial region. Its strong wind field and low central pressure had the potential to generate a rise in sea level (storm surge) along the northern coast of Sumatra. This study aims to quantify the storm surge contribution associated with TC Senyar using the Advanced Circulation (ADCIRC) hydrodynamic model over a domain spanning 95–105°E and 0–8°N. Simulations were conducted from 22 November to 2 December 2025, incorporating a two-day ramp-up period to gradually increase the meteorological forcing. Two scenarios were simulated: the total sea level, influenced by tides, wind, and atmospheric pressure; and the tidal sea level, influenced solely by tidal boundary conditions. The unstructured computational mesh was generated using OceanMesh2D at a resolution of 2.5–50km, based on GEBCO 2025 bathymetry and GSHHS coastline data. Meteorological forcing (wind and atmospheric pressure) was obtained from ERA5, while tidal boundary conditions were derived from TPXO10. Storm surge was computed using the residual method, in which the tidal sea level was subtracted from the total sea level, and was analyzed at four stations: Lhokseumawe, Idi Rayeuk, Belawan, and Kuala Tanjung. The results show maximum residual storm surge values of 0.06 m, 0.12 m, 0.18 m, and 0.17m, respectively, with peaks occurring between 25 and 27 November 2025. The largest storm surge amplification, exceeding 0.25m, occurred along the coast of the Malay Peninsula and the southern part of the Strait of Malacca.
Co-Authors Amanu, Rendy Syahril Amri, Sayful Avrionesti Avrionesti, Avrionesti Rizki Ramadani Rohman, Muhammad Faisal Yahya Darmawan