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All Journal EKSAKTA: Journal of Sciences and Data Analysis SAINSMAT Jurnal Sains Matematika dan Statistika Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Navigation Physics : Journal of Physics Education SAINSMAT: Jurnal Ilmiah Ilmu Pengetahuan Alam
Afghani, Fadhli Aslama
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Materials Science & Nanotechnology Mathematics Physics Other

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Journal : EKSAKTA: Journal of Sciences and Data Analysis

 1 
Rainfall Conditions When Maden Julian Oscillation Strong and Weak: Temporal Distribution in Jakarta, Bogor, and Tangerang Wibowo, Ofana Tri; Afghani, Fadhli Aslama; Christofelts, John Pieter; Halawa, Jordana Christian
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 5, ISSUE 1, April 2024
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/EKSAKTA.vol5.iss1.art1

Abstract

The Indonesian Maritime Continent has high rainfall variability with one of the causes, namely the Madden Julian Oscillation (MJO), especially in phases 3, 4, and 5. Madden Julian Oscillation (MJO) and rainfall have a correlation with one another. Therefore, this study aims to determine the effect of MJO on rainfall conditions in terms of intensity and frequency of occurrence every three months from 2013-2022 in Jakarta, Bogor, and Tangerang. The research method used is descriptive statistical analysis in the form of quarterly rainfall averages and anomalies as well as the Pearson correlation test. The data used is daily rainfall data for the 2013-2022 period. The results of the descriptive analysis show that the highest average rainfall occurs in the DJF period and the lowest is in the JJA period with the anomalies occurring in the DJF and JJA periods. On the other hand, the lowest frequency of strong and weak MJO events occurs during JJA, while the highest occurs during the DJF period. The correlation test conducted between the Madden Julian Oscillation (MJO) and rainfall found that the highest positive correlation value was 0.197073 on MAM and the highest negative correlation on SON was -0.11866, so the relationship is weak.
Analysis of Monthly Rainfall Characteristics in Nusa Tenggara Timur and its Spatial and Temporal Shifts Afghani, Fadhli Aslama; Ofana Tri Wibowo; Imawan Mashuri; Zuhairul A, Hasyid Agha
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 5, ISSUE 1, April 2024
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/EKSAKTA.vol5.iss1.art9

Abstract

The spatial characteristics of rainfall in Nusa Tenggara Timu for the periods 1961-1990 and 1991-2020 show similarities in terms of topography influencing local variations in rainfall intensity. Additionally, inland areas and the northern side of region experience higher rainfall compared to the coastal areas and the southern side. On the other hand, temporal characteristics reveal a monsoonal rainfall pattern with peak precipitation occurring in January and the lowest rainfall in August. Furthermore, there is a normal shift in rainfall patterns between the two periods, marked by a reduction in the intensity of dark colors in the 1991-2020 period compared to 1961-1990. There is also a positive shift in normal rainfall values for the months of April and December, while the remaining months experience a negative shift.
Co-Authors Asifin, Hasyid Agha Zuhairul Cahyo, Muhammad Adi Christofelts, John Pieter Halawa, Jordana Christian Imawan Mashuri Khirtin, Ramadoni Mashuri, Imawan Ofana Tri Wibowo Wibowo, Ofana Tri Zuhairul A, Hasyid Agha