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All Journal Journal of Mathematical and Fundamental Sciences Conciencia Science and Technology Indonesia Jurnal Penelitian Sains Jurnal Penelitian Pendidikan IPA (JPPIPA) International Journal of Remote Sensing and Earth Sciences (IJReSES) Jurnal Teori dan Aplikasi Fisika
Muhammad Irfan
Jurusan Fisika, Universitas Sriwijaya
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Environmental Science Materials Science & Nanotechnology Mathematics Physics Social Sciences

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Dinamika Karakteristik Curah Hujan Harian Wilayah Gambut Sumatera Kaitannya dengan El Niño Southern Oscillation (ENSO) dan Indian Ocean Dipole (IOD) Muhammad Irfan; Khairul Saleh; Nety Kurniawati
Jurnal Penelitian Pendidikan IPA Vol 11 No 11 (2025): November
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i11.13324

Abstract

Sumatran peatlands constitute a highly vulnerable ecosystem strongly Sumatran peatlands are a vulnerable ecosystem highly sensitive to daily rainfall variability driven by large-scale climate modes such as El Niño–Southern Oscillation (ENSO) and the Indian Ocean Dipole (IOD). This study analyzes the frequency distribution and intensity of daily rainfall over Sumatran peatlands from 1995 to 2023 in relation to ENSO and IOD phases. Daily rainfall data from nine BMKG stations were analyzed using Probability Density Function (PDF), supported by monthly climatology and Fast Fourier Transform (FFT) spectral analysis. Results show a right-skewed rainfall distribution, with peak frequency below 20 mm/day. During El Niño and positive IOD events, the PDF shifts leftward, indicating increased dry days; during La Niña, the right tail extends, increasing extreme rainfall probability. FFT reveals dominant annual cycles and sub-seasonal signals linked to the Madden-Julian Oscillation. Spatial patterns are consistent, though inland stations show stronger responses than coastal ones. Despite the lack of seasonal stratification and formal significance testing in this preliminary analysis, findings highlight how ENSO and IOD alter rainfall risk—drought during warm phases and flooding during cold phases. These insights support the development of early warning systems and climate-informed peatland management policies
Pemodelan Numerik Hubungan Pola Curah Hujan Wilayah Equatorial di Pulau Sumatera Terhadap Fenomena ENSO dan IOD Melly Ariska; Adam Darmawan; Hamdi Akhsan; Supari Supari; Muhammad Irfan; Iskhaq Iskandar
Jurnal Teori dan Aplikasi Fisika Vol. 11 No. 2 (2023): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v11i2.319

Abstract

Variability of Temperature Extreme Observes in Kalimantan Jamiatul Khairunnisa Putri; Suhadi; Muhammad Irfan; Hamdi Akhsan; Iskhaq Iskandar
Jurnal Penelitian Pendidikan IPA Vol 10 No 11 (2024): November
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i11.9048

Abstract

This study aims to analyze the trend of extreme temperatures in Kalimantan over the past few decades. The data used are daily temperatures from meteorological stations in West Kalimantan, Central Kalimantan, and South Kalimantan, with an observation period of January 1985 to December 2022. The research methodology involves four main stages: data collection, extreme temperature index calculation, trend detection, and correlation analysis with ENSO and IOD. The results showed an increasing trend in extreme temperatures (warming). The increase in mean annual maximum temperature (TXmean) ranged from 0.03°C to 2°C per century, while the mean annual minimum temperature increased from 0.2°C to 0.5°C per century. Monthly maximum value of daily max temperature (TXx) the increasing trend ranged from 0.19°C to 1.7°C, monthly maximum value of daily min temperature (TNx) increased from 0.1°C to 0.5°C. The monthly mean difference between daily max and min temperature (DTR) also shows an increase of 0.5°C to 1.7°C. This trend indicates that daytime (TXmean, TXx) and nighttime (TNmean, TNx) conditions in Kalimantan, especially in West, Central, and South Kalimantan, are getting hotter, with the daytime experiencing a more significant increase in temperature. The correlation between the extreme temperature index and ENSO and IOD is negative and positive, indicating that ENSO and IOD do not fully influence the increase in extreme temperatures. These findings have important implications for disaster mitigation planning and adaptation to climate change in the Kalimantan region.
Co-Authors Adam Darmawan Akmal Johan Aldri Frinaldi Aniza Aniza Arsali Arsali Arsali Arsali Azhar Affandi Dedi Setiabudidaya Fera Lusiana Frinsyah Virgo Hamdi Akhsan Iskhaq Iskandar Jamiatul Khairunnisa Putri Khairul Saleh Melly Ariska Nety Kurniawati Pradanto Poerwono Puad Maulana Mandailing Sri Safrina Suhadi Supari Supari Wijaya Mardiansyah Wijaya Mardiansyah