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Solih Alfiandy
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Buletin GAW Bariri ( BGB)
Published by Stasiun Pemantau Atmosfer Global Lore Lindu Bariri
ISSN : 27217752     EISSN : 27219704     DOI : https://doi.org/10.31172/bgb.v3i1
Core Subject : Science, Agriculture, Social,
Agriculture, Biological Sciences & Forestry Astronomy Computer Science & IT Earth & Planetary Sciences Environmental Science
Buletin GAW Bariri (BGB) merupakan buletin karya tulis ilmiah yang diterbitkan oleh Stasiun Pemantau Atmosfer Global Lore Lindu Bariri - Palu BMKG sebagai sarana publikasi hasil penelitian dan kajian di bidang Meteorologi, Klimatologi, Kualitas Udara, dan Geofisika (MKKuG), serta Lingkungan.
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Ilmu Bumi dan Planet (Lain-Lain)
Articles 56 Documents
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Karaktersitik Pola Arus Laut di Perairan Selat Sunda Periode Tahun 2013 – 2023 Latif Yuhana, Rofikoh; Guruh Pratomo, Danar; Khomsin, Khomsin
Buletin GAW Bariri (BGB) Vol 6 No 2 (2025): 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.v6i2.156

Abstract

This study examines the characteristics of ocean surface current patterns in the Sunda Strait using numerical model current data from Marine Copernicus during the period 2013 – 2023. The analysis was conducted to identify the direction and speed of currents in seasonal periods, namely the west season (December – January – February), transition season I (March – April – May), east season (June – July – August), and transition season II (September – October – November). Marine Copernicus model current data was verified against High Frequency (HF) Radar observation data using the statistical method of Pearson correlation coefficient (r) and Root Mean Square Error (RMSE), resulting in an r value of 0.77 and RMSE of 0.26 m/s, indicating a good level of accuracy. The results of the analysis show that in the west season, the dominant current heads northeast with an average speed of 0.5 – 1.0 m/s and a maximum of 1.5 – 2.0 m/s. In the first transitional season, the current flows to the northeast with an average speed of 0.75 – 1.25 m/s and a maximum of 1.5 – 2.0 m/s. In the east season, the dominant current flows to the southwest with an average speed of 1.25 – 1.75 m/s and a maximum of 1.5 – 2.0 m/s. In the second transitional season, the current flows irregularly towards the west and east, with an average speed of 1.0 – 1.5 m/s and a maximum of 1.5 – 2.0 m/s. These current patterns are influenced by monsoon winds, seabed topography, and coastal interactions, which impact navigation, fisheries, and marine ecosystems.
Prediksi Hujan Bulanan di Bali Selatan Menggunakan Regresi Berganda Berdasarkan Indikator Suhu dan Kelembaban Udara Forisman Daba, Irenius; Dewi, Krisna; Alghifari Sunaddin Nia, Muhammad Ridho; Akbar, Dzikrullah
Buletin GAW Bariri (BGB) Vol 6 No 2 (2025): 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.v6i2.165

Abstract

Southern Bali, characterized by intensive development and aviation activities, requires accurate rainfall information due to the influence of tropical atmospheric dynamics. This study employs a regression model based on air temperature and humidity using climatological data from 2000–2023 to analyze rainfall patterns. The results show that air temperature has the highest Pearson correlation with rainfall (r = 0.75), followed by air humidity (r = 0.67). However, RMSE evaluation indicates that humidity provides more accurate predictions (183.09 mm) than temperature (190.40 mm). These findings emphasize that correlation does not always reflect prediction quality, as it only represents linear relationships, whereas RMSE directly assesses model accuracy. Physically, humidity plays a direct role in cloud formation and rainfall, while temperature only regulates the atmosphere’s capacity to hold water vapor. Despite limitations during seasonal transition periods and extreme events, this model demonstrates potential to support data-driven rainfall prediction for risk mitigation, aviation meteorological services, and development planning in Southern Bali.
Karakteristik Angin Monsun Barat pada Periode Puncak Musim Hujan di Bandar Udara Sultan Hasanuddin Makassar Richard, Richard; Jasruddin, Jasruddin; Arsyad, Muhammad; Prasetyo, Adi
Buletin GAW Bariri (BGB) Vol 6 No 2 (2025): 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.v6i2.168

Abstract

This study aims to examine the characteristics of the West Monsoon wind based on convergence values at Sultan Hasanuddin International Airport, wind disturbance patterns over the Java Sea, the source and speed of air masses, regional-scale wind disturbances over Indonesia (Tropical Cyclones and Eddies), and wind flow patterns entering the study area under different rainfall categories during the period 2014 – 2023. The research employed a quantitative method by processing rainfall data and daily zonal (u) and meridional (v) wind component data during the peak rainy season (December – February). The analysis was conducted using the GrADS application to display streamline maps, data processing with Excel, and descriptive analysis. The results indicate that for the no-rain to light-rain categories, the characteristics of the West Monsoon wind are not clearly evident, except for wind disturbance patterns over the Java Sea and the speed and consistency of winds from the air-mass source toward the study area. In contrast, for moderate to very heavy or extreme rainfall categories, the characteristics of the West Monsoon wind are clearly observed. These conditions are characterized by air masses originating from the South China Sea, supported by strong and consistent wind speeds passing through the Karimata Strait and the Java Sea to Sultan Hasanuddin International Airport, as well as the presence of wind disturbances in the form of moderate to strong convergence over the Java Sea extending to the Makassar region. Therefore, the study concludes that the no-rain and light-rain categories exhibit nearly similar wind characteristics, while the main differences in the moderate to extreme rainfall categories lie in the consistency of wind speed and the intensity of convergence over the Java Sea.
Perbandingan Estimasi Magnitudo Lokal (ML) Gempabumi Hualien M7.2 di Taiwan Menggunakan Persamaan Shin et al. (1993) dan Guan et al. (2020) Aditya Setyo Rahman; Sutiyono Sutiyono; Levana Noviyanti; Solih Alfiandy
Buletin GAW Bariri (BGB) Vol 7 No 1 (2026): 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.v7i1.136

Abstract

Taiwan is a region characterized by complex tectonic conditions and high seismic activity, making it highly vulnerable to earthquake hazards. This study aims to calculate the Local Magnitude (ML) of the Hualien earthquake that occurred on April 3, 2024, as part of disaster risk mitigation efforts through the estimation of regionally relevant earthquake magnitude. Although the Local Magnitude scale is known to experience saturation for large earthquakes, this method remains valuable due to its sensitivity to local seismic wave characteristics and the dense seismic monitoring network available in Taiwan. The dataset used in this study consists of seismic records from 58 stations of the Central Weather Administration Seismic Network (CWASN) and 196 stations of the Taiwan Strong Motion Instrumentation Program (TSMIP), obtained from the geophysical database of the Central Weather Administration (CWA), Taiwan. The analysis involved instrument correction, conversion of acceleration records into Wood – Anderson equivalent seismic displacement, determination of maximum amplitudes, and application of geometric spreading and attenuation corrections that account for hypocentral depth and source – to – station distance. Local Magnitude calculations were performed by grouping the data according to hypocenter – to – station distance in order to evaluate the influence of distance variations on magnitude estimation. The results indicate that the estimated ML values range from 7.2 to 7.4, with variations influenced by station distribution, observation distance, and local site characteristics. These magnitude estimates are expected to provide more representative information for supporting emergency response and disaster management planning in Taiwan.
Korelasi Topologi Geometris Tapak Bangunan terhadap Tingkat Kerusakan Pasca Gempabumi dan Tsunami 2018 di Sebagian Kota Palu melalui Analisis Statistik Geospasial Yunifar Susanto D Madusila; Danang Sri Hadmoko; Iswari Nur Hidayati
Buletin GAW Bariri (BGB) Vol 7 No 1 (2026): 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.v7i1.171

Abstract

The 2018 Palu earthquake and tsunami caused extensive building damage, particularly along the coastal areas of Palu Bay. One factor influencing the severity of damage is the geometric topology of building forms. This study aims to classify the geometric topology of buildings and analyze the relationship between building geometric forms and damage levels using data from Copernicus EMS Rapid Mapping and OpenStreetMap (OSM). A spatial overlay method was applied to link building footprints with damage levels, while both damage and geometric classification were validated using high resolution WorldView–2 imagery. Statistical analysis using the Kruskal – Wallis H test and Dunn’s post hoc test revealed a significant influence of building shape on damage level p – value < 0.05, where irregular building shapes other shapes tend to be more vulnerable to severe damage. In addition to building geometry, damage levels are also influenced by location – related factors, particulary proximity to the coastline, elevation, and tsunami inundation height. Therefore, more regular geometric buildings forms, such as rectangular and square shapes, are recommended as considerations in building design and settlement planning in earthquake and tsunami prone areas.
Kajian Hujan Ekstrem di Balikpapan dan Hubungannya dengan Fenomena Atmosfer Skala Global dan Regional Pada Tahun 1995 – 2024 Novrida, Diyan; Arsyad, Muhammad; Husain, Husain; Prasetiyo, Adi
Buletin GAW Bariri (BGB) Vol 7 No 1 (2026): 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.v7i1.172

Abstract

Balikpapan is one of the major cities in East Kalimantan that experiences complex atmospheric dynamics due to its geographical conditions. These conditions make Balikpapan vulnerable to extreme rain events that impact the environmental, economic, and sosial sectors. Extreme rain in a region is generally influenced by global and regional atmospheric phenomena such as the El Niño–Southern Oscillation (ENSO), the Indian Ocean Dipole (IOD), and the Madden–Julian Oscillation (MJO), as well as convergent and cyclonic wind patterns. However, studies that specifically examine the relationship between extreme rain and these atmospheric phenomena in Balikpapan remain limited, particularly those utilizing long – term data spanning 30 years, as recommended by the World Meteorological Organization (WMO). This study aims to analyze the relationship between extreme rain in Balikpapan and global as well as regional atmospheric phenomena during the period 1995 – 2024. The data used include daily rainfall, sea surface temperature anomalies in the Niño 3.4 region, the Dipole Mode Index (DMI), MJO phases, and reanalysis data of divergence and relative vorticity. The results show that there were 10 extreme rain events in Balikpapan between 1995 and 2024, generally influenced by convergent wind patterns, cyclonic wind patterns, La Niña, IOD Netral conditions, and the MJO in phase 2. The percentage of convergent and cyclonic wind pattern was higher than that of La Niña, IOD Netral, and MJO in phase 2, indicating that extreme rain in Balikpapan during 1995 – 2024 was more strongly influenced by regional – scale atmospheric phenomena than by global –  scale ones.

Page 6 of 6 | Total Record : 56

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