Article Per Year (5 Year)
p-Index From 2021 - 2026
2.612
P-Index
This Author published in this journals
All Journal Jurnal Geosaintek Jurnal Laut Khatulistiwa Jurnal Rekayasa Hijau Community Development Journal: Jurnal Pengabdian Masyarakat Jurnal Riset Kelautan Tropis (Journal Of Tropical Marine Research) (J-Tropimar) Bakti Budaya: Jurnal Pengabdian kepada Masyarakat Jurnal Riset Kelautan Tropis (J-Tropimar) Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan Geosains Kutai Basin Depik Jurnal Ilmu-Ilmu Perairan, Pesisir, dan Perikanan Jurnal Rekayasa Geofisika Indonesia (Journal of Environmental Sustainability Management) Jurnal Geosaintek
Zetsaona Sihotang
Program Studi Geofisika, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Mulawarman
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Physics Public Health Social Sciences

Published : 15 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 15 Documents
Search

 1   2 
Analisis Pengaruh ENSO dan IOD Terhadap Evaporasi di Selat Makassar Menggunakan Metode Bowen Ratio Riza, Muhammad; Zetsaona Sihotang; Idris Mandang; Mustaid Yusuf
Jurnal Riset Kelautan Tropis (Journal Of Tropical Marine Research) (J-Tropimar) Vol 7 No 2 (2025): November
Publisher : Universitas Hang Tuah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30649/jrkt.v7i2.122

Abstract

Perpindahan panas global sangat penting untuk memahami mekanisme variabilitas iklim dalam skala global. Rasio Bowen dapat digunakan untuk menentukan fluks panas laten pada suatu permukaan. Tujuan penelitian ini adalah untuk Mengidentifikasi variabilitas evaporasi di Selat Makassar menggunakan metode bowen ratio dan kaitannya terhadap fenomena ENSO dan IOD dan Mengetahui durasi dari fenomena ENSO (El Nino Southern Oscillation) dan IOD (Indian Ocean Dipole) terhadap perubahan evaporasi di Selat Makassar. Rasio Bowen dihitung dengan membagi nilai sensible heat flux dengan latent heat flux. Setelah mendapatkan nilai Rasio Bowen kemudian akan dicari cross-correlation diantara Rasio Bowen dan ONI (Ocean Nino Index) kemudian ditentukan berapa lama jeda waktu yang diperlukan untuk anomali di Samudera Pasifik berpengaruh ke Selat Makassar. Kemudian Cross-correlation dihitung kembali diantara Rasio Bowen dan DMI untuk melihat efek anomali di Samudera Hindia terhadap Selat Makassar. Data sensible heat flux dan latent heat flux didapatkan dari ECMWF (European Centre for Medium-Range Weather Forecasts) dianalisis dari tahun 1990-2022 dan akan dirata-ratakan perbulannya. Didapatkan hasil penurunan Rasion Bowen dari tahun 1990-2022 yang mengindikasikan evaporasi yang semakin rendah. Klimatologi Rasio Bowen menunjukkan evaporasi mengalami 2 kali puncak di bulan April dan November dengan nilai Rasio Bowen berturut-turut 0,133 dan 0,14. Korelasi silang Rasio Bowen dan ONI menunjukkan hubungan yang kuat dimana nilai R sebesar 0.65 dengan lag 2 bulan. Sedangkan korelasi silang Rasio Bowen dan DMI mendapatkan hasil R sebesar 0.13 dengan lag 1 bulan. Dari hasil penelitian ini didapatkan bahwa ENSO menjadi faktor yang memiliki efek besar terhadap evaporasi di Selat Makassar.
Analisis Komparatif Metode FFT Dan Least Squares Dalam Penentuan Komponen Pasang Surut Di Perairan Indonesia Al-Ghifari, Najwan; Budiarsa, Anugrah Aditya; Ritonga, Irwan Ramadhan; Riza, Muhammad; Sihotang, Zetsaona; Mandang, Idris
Jurnal Laut Khatulistiwa Vol. 9 No. 1 (2026): February
Publisher : Dept. Marine Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/lkuntan.v9i1.103907

Abstract

This study evaluates the performance of Fast Fourier Transform (FFT) and Least Squares (LS) methods in tidal analysis across four strategic locations representing Indonesia's diverse tidal regimes: Belitung, Bontang, Melonguane, and Natuna. Eight principal tidal components (O1, K1, M2, S2, N2, K2, P1, Q1) were analyzed. The results demonstrate that the Least Squares method is significantly superior, achieving an RMSE reduction of 79.2% to 94.0% compared to FFT. While tidal classifications based on Formzahl numbers remained consistent across both methods—identifying diurnal types in Belitung and mixed-prevailing semidiurnal types elsewhere—the LS method provided more precise harmonic constants. These findings recommend the LS method for high-accuracy operational tidal modeling and sea-level prediction in Indonesian waters.
Pengaruh Perubahan Suhu Permukaan Laut (SPL) di Selat Makassar terhadap Curah Hujan di Kota Samarinda dan Makassar pada Fase ENSO Asyikin, Nurul; Yusuf, Mustaid; Sihotang, Zetsaona; Wiyani, Riski Indah
Jurnal Laut Khatulistiwa Vol. 9 No. 1 (2026): February
Publisher : Dept. Marine Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/lkuntan.v9i1.103504

Abstract

Sea Surface Temperature (SST) is a key oceanographic parameter that influences atmospheric processes, particularly weather and climate variability, including rainfall, and its variability is closely linked to large-scale climate phenomena such as ENSO. This study examines the relationship between SST variability in the Makassar Strait and rainfall in Samarinda City and Makassar City under three climate conditions representing ENSO phases: El Niño (2015), normal conditions (2017), and La Niña (2022). Daily SST and rainfall data were converted into monthly mean values and analyzed using Pearson correlation to assess the strength and direction of their relationship. The results show that SST–rainfall correlations in Samarinda City were −0.423 during El Niño conditions, −0.219 during normal conditions, and −0.39 during La Niña conditions, indicating a moderate influence during El Niño and weaker relationships in other phases. In Makassar City, correlation values were −0.331 in 2015, −0.10 in 2017, and +0.69 in 2022, suggesting weak relationships during El Niño and normal conditions but a strong positive relationship during La Niña conditions. Overall, these findings demonstrate that the influence of SST variability in the Makassar Strait on rainfall differs by region and ENSO phase, providing useful insight for developing region-specific rainfall prediction models based on oceanic and climatic variability.
Penguatan Kapasitas Masyarakat dan Mahasiswa melalui Aksi Bersih Pantai: Upaya Konservasi Lingkungan Berbasis Edukasi dan Kolaborasi di Pesisir Samboja Sihotang, Zetsaona; Hermawan, Qori Fajar; Khoirunisa, Nanda; Riza, Muhammad; Mandang, Idris; Yusuf, Mustaid; Wiyani, Riski Indah; Rahmiati
Bakti Budaya Vol 9 No 1 (2026): 2026: Edisi 1
Publisher : Faculty of Cultural Sciences, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/bakti.9380

Abstract

This community service activity was motivated by the problem of marine waste that has an impact on the ecosystem and quality of tourism at Cemara Beach and Pemedas Beach, Samboja, East Kalimantan. To overcome this, a collaborative approach was applied by involving three strategic groups: tourism managers, the community/visitors, and students. The methods used consisted of capacity building for the community and managers, as well as service learning for students. During the two-day implementation, socialization, beach clean-up actions, marine monitoring, and waste sorting were carried out. This activity has collected 160 kg of waste, increased environmental literacy, and encouraged behavioral change. Students gained contextual experience in oceanographic monitoring and waste identification. The implications of this activity include plans to establish a fostered beach as a center for sustainable capacity development that supports environmental conservation and community welfare. The results show that multi-actor collaboration is able to create significant social and ecological impacts in coastal areas. === Kegiatan pengabdian ini dilatarbelakangi oleh permasalahan sampah laut yang berdampak pada ekosistem dan kualitas wisata di Pantai Cemara dan Pantai Pemedas, Samboja, Kalimantan Timur. Untuk mengatasi hal ini, pendekatan kolaboratif diterapkan dengan melibatkan tiga kelompok strategis: pengelola wisata, masyarakat/pengunjung, dan mahasiswa. Metode yang digunakan terdiri dari capacity building bagi masyarakat dan pengelola, serta service learning untuk mahasiswa. Selama pelaksanaan dua hari dilakukan sosialisasi, aksi bersih pantai, pemantauan laut, dan pemilahan sampah. Kegiatan ini telah mengumpulkan 160 kg sampah, meningkatkan literasi lingkungan, dan mendorong perubahan perilaku. Mahasiswa memperoleh pengalaman kontekstual dalam pemantauan oseanografi dan identifikasi sampah. Implikasi dari kegiatan ini mencakup rencana pembentukan pantai binaan sebagai pusat pengembangan kapasitas berkelanjutan yang mendukung konservasi lingkungan dan kesejahteraan masyarakat. Hasilnya menunjukkan bahwa kolaborasi multiaktor mampu menciptakan dampak sosial dan ekologis yang signifikan di kawasan pesisir.
Observation and numerical modeling of physical oceanography in the Balikpapan Bay, East Kalimantan: Preliminary results Mutiara Rachmat Putri; Iwan P Anwar; Zetsaona Sihotang; Lamona I. Bernawis; Agus Setiawan; Muhammad Riza; Idris Mandang; Willem M. Tatipatta
Depik Vol 10, No 2 (2021): August 2021
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.10.2.19259

Abstract

The Indonesian government plans to move the capital city from Jakarta to Penajam Paser Utara (PPU) which is the upstream area of Balikpapan Bay, East Kalimantan. There are several activities in the planned new capital city that potentially affect the condition of land and marine ecosystems, including clearing new land for housing and agriculture as well as expanding mining and petroleum areas. Directly or indirectly, these activities could affect the oceanographic conditions of Balikpapan Bay. For this reason, in order to obtain an up-to-date picture of Balikpapan Bay, an oceanographic survey was conducted in early March 2020. In addition, to support the analysis of marine dynamics in these waters and their predictions in the future, numerical simulations of hydrodynamic modeling were also carried out. Oceanographic observations indicate significant water stratification in the area about 20 km from the mouth of the bay. This result is also well illustrated in the hydrodynamic model numerical simulation, where there is a water loop at the confluence between salt and fresh water masses from two rivers 18-20 km from the mouth of Balikpapan Bay. Keywords:The national capital city of IndonesiaBalikpapan BayPhysical oceanography ObservationCoastal and marine Ecosystem
Co-Authors AGUS SETIAWAN Anugrah Aditya Budiarsa, Anugrah Asyikin, Nurul Idris Mandang Idris Mandang Idris Mandang, Idris Irwan Ramadhan Ritonga Iwan P Anwar Lamona I. Bernawis Muhammad Riza Muhammad Riza Muhammad Riza Mustaid Yusuf Mutiara Rachmat Putri Najwan Al-Ghifari Nanda Khoirunisa Qori Fajar Hermawan Rahmawati Munir Rahmiati Wasono Wasono Wasono Wasono Wasono, Wasono Willem M. Tatipatta Wiyani, Riski Indah Yusuf, Mustaid