| NIM | L1C022070 |
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| Namamhs | FAHREZA AGUSTIAR HIMAWAN |
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| Judul Artikel | Analisis Karakteristik Angin dan Significant Wave Height (SWH) di Selat Malaka pada Kejadian Siklon Tropis Senyar |
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| Abstrak (Bhs. Indonesia) | Selat Malaka merupakan jalur pelayaran internasional strategis yang sangat rentan terhadap gelombang ekstrem akibat karakteristik topografinya yang sempit dan dangkal, terutama saat dilanda cuaca buruk seperti Siklon Tropis Senyar (25–28 November 2025). Penelitian ini bertujuan menganalisis karakteristik dinamika angin permukaan dan respons Significant Wave Height (SWH) di perairan tersebut selama periode badai. Pemodelan numerik gelombang dilakukan menggunakan model Simulating Waves Nearshore (SWAN) dengan masukan data angin reanalisis ERA5 dan batimetri GEBCO. Evaluasi kinerja model dilakukan menggunakan Diagram Taylor terhadap data satelit CCMP dan CMEMS, sedangkan hubungan spasio-temporal dikaji melalui metode Cross-Correlation Function (CCF). Hasil penelitian menunjukkan siklon memicu sirkulasi siklonik dengan kecepatan angin maksimum 17,39 m/s dan lonjakan wind stress hingga 0,71 N/m². Model SWAN mampu merepresentasikan dinamika gelombang selat (R>0,90), meskipun terdapat sedikit underestimation pada puncak badai akibat batasan resolusi data reanalisis. Peningkatan SWH merespons lonjakan wind stress secara signifikan dengan jeda waktu (time lag) propagasi energi selama 1–2 jam. Respons tercepat terjadi di perairan tengah (1 jam), sedangkan perairan dangkal di utara dan selatan mengalami jeda 2 jam yang disertai proses atenuasi energi akibat pergesekan dasar laut. |
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| Abtrak (Bhs. Inggris) | The Malacca Strait is highly vulnerable to extreme waves due to its narrow and shallow topography, particularly during severe weather like Tropical Cyclone Senyar (November 25–28, 2025). This study analyzed surface wind dynamics and Significant Wave Height (SWH) responses in these waters during the storm. Numerical wave modeling was conducted using the Simulating Waves Nearshore (SWAN) model with ERA5 reanalysis winds and GEBCO bathymetry. Model performance was evaluated using Taylor Diagrams against CCMP and CMEMS satellite data, while spatio-temporal relationships were examined via the Cross-Correlation Function (CCF). Results showed the cyclone triggered a cyclonic circulation with a maximum wind speed of 17.39 m/s and a wind stress surge of 0.71 N/m². The SWAN model successfully represented the strait's wave dynamics (R>0.90), despite a slight underestimation at the storm peak due to reanalysis data resolution limits. SWH responded significantly to wind stress surges with a 1–2 hour energy propagation time lag. The fastest response occurred in the central waters (1 hour), whereas shallow northern and southern waters experienced a 2-hour lag accompanied by energy attenuation from bottom friction. |
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| Kata kunci | Siklon Tropis Senyar, Wind Stress, Model SWAN, Selat Malaka, Diagram Taylor |
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| Pembimbing 1 | Amir Yarkhasy Yuliardi, S.Kel., M.Si. |
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| Pembimbing 2 | Isnaini Prihatiningsih, S.I.K., M.Si. |
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| Pembimbing 3 | |
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| Tahun | 2026 |
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| Jumlah Halaman | 55 |
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| Tgl. Entri | 2026-07-28 09:30:04.452149 |
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