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All Journal Fisitek : Jurnal Ilmu Fisika dan Teknologi Indonesian Physical Review
Adhitiansyah, Daffa
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Computer Science & IT Education Physics

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ANALISIS KEJADIAN HUJAN LEBAT MENGGUNAKAN DATA CITRA SATELIT HIMAWARI-8 (Studi Kasus Kota Manado, 16 Januari 2021) Hutagalung, Maria Octavia Rosnauli; Gusranda, Iqbal; Adhitiansyah, Daffa; Mulya, Aditya
FISITEK: Jurnal Ilmu Fisika dan Teknologi Vol 6, No 2 (2022)
Publisher : Universitas Islam Negeri Sumatera Utara Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30821/fisitekfisitek.v6i2.14445

Abstract

Pada tanggal 16 Januari 2021 sebagian besar wilayah di Kota Manado tergenang banjir dikarenakan hujan dengan intensitas yang tinggi. Penelitian ini bertujuan untuk mengetahui penyebab banjir di Kota Manado dengan melakukan analisis peta streamline dari Berau of Meteorology (BoM), data Satelit Himawari-8 dengan metode Cloud Convective Overlays (CCO) dan teknik Red-Green-Blue (RGB), data kelembaban dan vertical velocity dari ECMWF. Hasil analisis menunjukkan adanya sirkulasi monsun Asia dan pusat tekanan rendah di perairan laut Arafura dan Samudera Hindia sebelah barat daya pulau Sumatera yang menyebabkan konvergensi dan shearline di Kota Manado. Analisis citra satelit menunjukkan suhu inti awan yang mencapai -77.5°C dan sebaran awan konvektif yang terdeteksi dengan baik melalui metode CCO. Teknik RGB airmass menunjukkan adanya massa udara hangat dan awan tinggi yang tebal yang diketahui merupakan awan konvektif  yang mengandung partikel es kecil melalui analisis RGB day convective storm. Analisis kelembaban udara menunjukkan kondisi atmosfer yang jenuh dari sebelum hingga saat kejadian hujan lebat dengan adanya gerakan vertikal ke atas yang mendorong pembentukan awan konvektif yang menjulang tinggi.
IDENTIFICATION OF MESOSCALE CONVECTIVE COMPLEX (MCCS) AT SOUTHERN PAPUA FOR THE PERIOD OF DECEMBER 2017 – NOVEMBER 2022 Adhitiansyah, Daffa; Veanti, Desak Putu Okta; Sosaidi, Dedi Sucahyono; Fadlan, Ahmad
Indonesian Physical Review Vol. 6 No. 3 (2023)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v6i3.256

Abstract

One factor contributing to rainfall in a certain region is the presence of convective cloud growth. Extensive convective clouds can trigger extreme weather conditions and the occurrence of Mesoscale Convective Complex (MCC) phenomena. MCCs phenomena are characterized by circular cloud cover with eccentricity ≥ 0.7, core cloud area ≥ 50,000 km², cloud cover area ≥ 100,000 km², and cloud top temperature ≤ -52 °C or 221 K. This study aims to identify the spatial and diurnal of MCC in the Southern Papua and for the period of December 2017 to November 2022, as well as to assess its impacts on rainfall during MCC events. Satellite data from Himawari-8 in IR channel was used to analyze MCCs criteria, which were then plotted using a geographic visualization software. Rainfall data in GSMaP was processed using GrADS to display rainfall values. The data processing procedure is carried out using an algorithm based on the study conducted by Maddox. The results of the spatial distribution analysis showed that there were 20 MCC events that occurred during the 5-year period, with dominant growth in inland areas near mountainous and high-topography regions. Seasonally, MCC events predominantly occurred during the MAM period and were least frequent in the JJA period. The diurnal distribution revealed that MCC events had a nocturnal life cycle, forming during the nighttime until early morning. Analysis of the GSMaP rainfall data indicated that the dominant rainfall intensity caused by MCC events was heavy rain (20 – 50 mm/hr).
Co-Authors Fadlan, Ahmad Gusranda, Iqbal Hutagalung, Maria Octavia Rosnauli Mulya, Aditya Sosaidi, Dedi Sucahyono Veanti, Desak Putu Okta