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All Journal EKSAKTA: Journal of Sciences and Data Analysis Jurnal Fisika dan Terapannya
Ofana Tri Wibowo
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Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Materials Science & Nanotechnology Physics

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Temporal Analysis of Rainfall Characteristics in Response to Climate Change in the Special Region of Yogyakarta Province Mashuri, Imawan; Fadhli Aslama Afghani; Ofana Tri Wibowo
JFT : Jurnal Fisika dan Terapannya Vol 11 No 2 (2024): DESEMBER
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v11i2.43707

Abstract

Climate change has resulted in uneven rainfall variations. The temporal analysis of rainfall in the Special Region of Yogyakarta Province was conducted through the calculation of monthly averages, seasonal averages, and annual trends using the Climate Data Operator (CDO) and Microsoft Excel application over 60 years from 1961 to 2020, utilizing ERA5 data. The time frame is divided into two periods: 1961-1990 and 1991-2020, aiming to observe rainfall characteristics such as changes, patterns, and trends that occurred during these intervals. The highest monthly average rainfall occurs in January for both periods, registering 378 mm for 1961-1990 and 370 mm for 1990-2020. In contrast, the lowest monthly average occurs in August, with values of 51 mm for 1961-1990 and 38 mm for 1991-2020. The highest seasonal average rainfall occurs during the DJF period, with values of 945 mm for 1961-1990 and 1022 mm for 1991-2020. However, the lowest seasonal average occurs during the JJA period, with values of 228 mm for 1961-1990 and 191 mm for 1991-2020. The rainfall trend shows an increase for the first period (1961-1990), whereas decreases in the second period (1991-2020), including wet seasons, dry seasons, and annual. The result can be associated with climate change, where there are occurrences of extremely wet and extremely dry seasons. Overall, the Special Region of Yogyakarta province experienced continuous yearly rainfall from 1961 to 2020.
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 Afghani, Fadhli Aslama Fadhli Aslama Afghani Imawan Mashuri Mashuri, Imawan Zuhairul A, Hasyid Agha