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All Journal BULETIN OSEANOGRAFI MARINA Indonesian Journal of Oceanography
Saragih, Laurentia Alexandra
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Agriculture, Biological Sciences & Forestry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Environmental Science

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Spatio-Temporal Characteristic Analysis of Marine Heatwaves in the Savu Sea (1982-2021) Attaqwa, Rizal; Respati, Deodato Naresvara Rayi; Juviani, Dian; Susilodewi, Sinta Dwis; Saragih, Laurentia Alexandra; Mustaqim, Ikhsan; Wirasatriya, Anindya; Ismunarti, Dwi Haryo
Buletin Oseanografi Marina Vol 14, No 2 (2025): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v14i2.70846

Abstract

Atmospheric interactions have led to a consistent rise in ocean temperatures in the Indonesian seas, exacerbated by the emergence of marine heatwaves (MHWs) that extend over thousands of kilometers. MHWs are defined as temperature anomalies above the 90th percentile of the sea surface temperature (SST) baseline for at least five consecutive days. The Savu Sea, influenced by the Indonesian throughflow that transports warm water from the Pacific to the Indian Ocean, experiences significant temperature anomalies. This study employs OSTIA L4 Marine Copernicus Global Ocean Physics Reanalysis SST data from 1982 to 2021 to analyze the frequency, duration, and intensity of MHW events in this region. Using Hobday's hierarchical approach, the study finds that MHWs in the Savu Sea lasted up to 1,170 days over 40 years, with 117 recorded events. The worst MHW event occurred in 2016, lasting 194 days with a maximum cumulative intensity of 2.0°C/year, particularly affecting the northern Savu Sea. These heatwaves significantly impact marine ecosystems, leading to coral bleaching that affects about 50% of coral colonies and threatens marine biodiversity and fisheries recovery.
Analisis Karakteristik Marine Heatwaves di Wilayah Pengelolaan Perikanan 711 Saragih, Laurentia Alexandra; Ismunarti, Dwi Haryo; Kunarso, Kunarso; Hatmaja, Rahaden Bagas
Indonesian Journal of Oceanography Vol 7, No 2 (2025): Indonesian Journal of Oceanography
Publisher : University of Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijoce.v7i2.26386

Abstract

Penelitian ini dilakukan untuk menganalisis karakteristik MHW di WPPNRI 711 meliputi Selat Karimata, Laut Natuna, dan Laut Natuna Utara yang mana merupakan wilayah yang memiliki potensi perikanan ikan pelagis kecil dan pelagis besar. Tujuan penelitian ini adalah untuk mengidentifikasi metriks MHW yang terjadi selama 42 tahun. Data yang digunakan dalam penelitian ini adalah data remote sensing suhu permukaan laut yang berasal dari Copernicus Marine Environtment Monitoring Service (CMEMS). Metode pendekatan yang digunakan yaitu dengan statistika deskriptif. Hasil yang ditemukan yaitu rata – rata karakteristik MHW di WPPNRI 711 yaitu frekuensi 2 – 4 kali per tahun; Rerata durasi 8 – 18 hari; dengan rerata intensitas 1oC – 1.6 oC. Tren frekuensi MHW mengalami peningkatan positif 0 – 0,2 kejadian per tahun; Tren durasi dengan rentang nilai -0,5 – 0,5 hari/tahun; Tren intensitas yaitu -0,08 oC – 0,08oC per tahun. Kejadian MHW tertinggi berdasarkan kondisi intensitas selama 42 tahun terjadi pada tahun 2016, 1998, dan 2023.
Co-Authors Anindya Wirasatriya Attaqwa, Rizal Dwi Haryo Ismunarti Hatmaja, Rahaden Bagas Juviani, Dian Kunarso Kunarso Mustaqim, Ikhsan Respati, Deodato Naresvara Rayi Susilodewi, Sinta Dwis