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ANALISIS CUACA EKSTREM PADA KEJADIAN BANJIR DI KOTA PADANG 13 JULI 2023 Al Badri, Abdul Aziz
Jurnal Material dan Energi Indonesia Vol 15, No 01 (2025)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jme.v15i01.52552

Abstract

AbstrakPenelitian ini mengkaji mengenai kondisi atmosfer dalam kejadian hujan lebat yang mengakibatkan banjir di wilayah Padang, Sumatera Barat pada 13 Juli 2023. Penelitian dilakukan dengan memanfaatkan data udara atas dari Wyoming University, data Satelit Himawari-9, data anomaly suhu permukaan laut dari NOAA, dan data Reanalysis European Centre for Medium-Range Weather Forecast (ECMWF). Beberapa pendekatan dilakukan untuk mengetahui berbagai faktor penyebab dalam proses hujan lebat yang mengakibatkan banjir di wilayah Padang. Analisis stabilitas atmosfer dilakukan dengan penggunaan aplikasi RAOB 5.7 dari data pengamatan udara atas. Analisis sebaran awan konvektif dilakukan dengan dua metode yaitu CCO (Cloud Convective Overlays) dan RGB Night Microphysics. Hasil pengolahan data menunjukkan kondisi atmosfer yang labil dengan nilai indeks kestabilannya yang tergolong dalam kategori moderat hingga kuat. Hasil tersebut memberikan pemahaman mengenai faktor-faktor pendorong terjadinya cuaca buruk, memberikan gambaran serta pengetahuan lebih lanjut mengenai kejadian serupa di wilayah Indonesia.Kata kunci: hujan lebat, satelit himawari-9, cuaca buruk, banjir, udara atas AbstractThis research examines the atmospheric dynamics during the occurrence of heavy rainfall leading to flooding in the Padang region, West Sumatra, on July 13, 2023. The research utilized upper air data from Wyoming University, Himawari-9 Satellite data, sea surface temperature anomaly data from NOAA, and data from the European Centre for Medium-Range Weather Forecast (ECMWF) Reanalysis. Various approaches were employed to identify various contributing factors in the process of heavy rainfall leading to flooding in the Padang region. Atmospheric stability analysis was conducted using the RAOB 5.7 application based on upper air observation data. Convective cloud distribution analysis was performed using two methods: Cloud Convective Overlays (CCO) and RGB Night Microphysics. The processed data revealed a condition of a potentially unstable atmosphere with stability index values classified as moderate to strong. These results provide insights into the factors driving adverse weather conditions, offering a depiction and further understanding of similar events in the Indonesian region.Key word: heavy rainfall, himawari-9 satellite, adverse weather, flooding, upper air
Analisis Kondisi Atmosfer pada Kejadian Hujan ES di Kota Palembang 04 November 2023 Al Badri, Abdul Aziz; Darmawan, Yahya
GEOGRAPHIA : Jurnal Pendidikan dan Penelitian Geografi Vol. 5 No. 1 (2024): Juni
Publisher : Jurusan Pendidikan Geografi Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53682/gjppg.v5i1.8469

Abstract

Seasonal transitions in Indonesia are typically accompanied by extreme weather phenomena, such as hail that occurred in the city of Palembang on November 4, 2023. The analysis of atmospheric conditions is intended to understand the dynamics of the atmosphere during the occurrence of the hailstorm phenomenon. The data used in this study include satellite imagery from Himawari-9 channels 8, 11, 13, 15, GSM data, ECMWF modelling data, and SST anomaly data. The research results indicate that anomalies in sea surface temperature and vertical convergence profiles, as well as relative humidity (RH), strengthen the potential for convective activity leading to extreme weather conditions. Based on Himawari-9 satellite imagery, the time series graph shows the lowest peak cloud temperature at around -80°C, with the Atmospheric Stability Index based on the GSM method indicating a labile atmospheric condition. Furthermore, using the RGB 24 Hour Microphysics and CCO methods, Cumulonimbus clouds were observed to begin growing at 07:20 UTC, entering the mature stage at 09:20 UTC, and starting to decay at 10:20 UTC.