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All Journal Buletin GAW Bariri ( BGB) Casuarina: Environmental Engineering Journal
Melinda, Shelin
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Agriculture, Biological Sciences & Forestry Astronomy Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Energy Engineering Environmental Science Immunology & microbiology

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Pengaruh Madden Julian Oscillation (MJO) terhadap Sifat Hujan Tahunan 1990 – 2020 di 2X11 Kayu Tanam Sumatera Barat Pancariniwati, Sri; Fadila, Riska; Melinda, Shelin
Buletin GAW Bariri (BGB) Vol 5 No 2 (2024): BULETIN GAW BARIRI
Publisher : Stasiun Pemantau Atmosfer Global Lore Lindu Bariri - Palu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31172/bgb.v5i2.134

Abstract

Among the various atmospheric dynamics phenomena, there is an inter – seasonal phenomenon that has a major influence on rainfall variability in Indonesia, namely the Madden Julian Oscillation (MJO). In general, increased rainfall in Indonesia, especially West Sumatra, occurs when the MJO phase is active. This study will discuss the influence of the MJO on rainfall conditions in the 2x11 Kayu Tanam area which is reviewed from its nature in 4 Phases and 8 Phases. The results of the study show that the MJO amplitude above 1 indicates the influence of the MJO phase on increasing or decreasing rainfall compared to normal in 2x11 Kayu Tanam. Based on the division of the MJO into 4 phases (phases 2 – 3, 4 – 5, 6 – 7, and 8 – 1), the dominant MJO event that influences the increase in rainfall in 2x11 Kayu Tanam occurs in phase 2 – 3, while the dominant MJO event that influences the decrease in rainfall in 2x11 Kayu Tanam occurs in phase 6 – 7. Meanwhile, based on the division of MJO into 8 phases (1, 2, 3, 4, 5, 6, 7, and 8), the dominant MJO event that influenced the increase in rainfall in 2x11 Kayu Tanam occurred in phase 2, while the dominant MJO event that influenced the decrease in rainfall in 2x11 Kayu Tanam occurred in phase 6.
ANALISIS POLA CURAH HUJAN DI PAPUA BARAT DAYA: Bahasa Indonesia Melinda, Shelin; Pancariniwati, Sri; Maulana, Wahyu Taqwa; Wibowo, Krisnadi Pandu
Casuarina: Jurnal Teknik Lingkungan Vol 3 No 1 (2025): CEEJ OCT 2025
Publisher : LRI Universitas Muhammadiyah Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33506/ceej.v3i1.4798

Abstract

The province of Southwest Papua is characterized by its mountainous terrain, which influences the region's precipitation patterns. The typical rainfall distribution in this area takes on an "A" shape, exhibiting a peak of highest rainfall in the middle of the year. This pattern is observed in regions shaped by local features such as topography and wind systems, with significant rainfall typically occurring in June and July. To enhance the accuracy of climate forecasting, Indonesian Agency for Meteorology, Climatology, and Geophysics (BMKG) has revised its climatology data, updating the Normal Rainfall figures from the period 1981-2010 to those from 1991-2020. This updated framework serves as a reference for identifying rainfall types across Indonesian territories, particularly in eastern Indonesia and Southwest Papua. Analysis of rainfall data collected from various monitoring stations in the Southwest Papua region for the years 2020 to 2024 reveals the existence of two distinct rainfall patterns: Local type 1 observed at the Majener, Malagusa, Klasmelek, DEO Sorong Meteorological Station and Sorong Geophysics Station, and Local type 2 noted at the Walal, Klamalu, Mariyai, and Waisai rain posts. The most intense rainfall peaks typically occur in July and August, ranging from 300 - 600 mm per month, whereas the lowest precipitation levels are generally recorded in February, with values between 0 - 100 mm per month.
Co-Authors Fadila, Riska Maulana, Wahyu Taqwa Pancariniwati, Sri Wibowo, Krisnadi Pandu