Rainfall Characteristics in Kalimantan Island During ENSO and IOD Phases: Insights from Composite Analysis

Akhsan, Hamdi and Suhadi, Suhadi (2025) Rainfall Characteristics in Kalimantan Island During ENSO and IOD Phases: Insights from Composite Analysis. Jurnal Ilmu Fisika, 17 (1). pp. 88-100. ISSN 1979-4657 E-ISSN : 26147386

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Abstract

This study aims to analyze the characteristics of rainfall in Kalimantan Island during the ENSO and IOD phases using composite method. This study uses ERA5 reanalysis data for the period 1985-2023. The analysis was carried out using Python in Jupyter Notebook Software to visualize rainfall patterns across four seasons (DJF, MAM, JJA, and SON). The results indicate that El Niño events reduce rainfall during the JJA season, with the largest deficit occurring in the southern region of Kalimantan, where rainfall drops to less than 5 mm per season. Conversely, Positive IOD conditions exacerbate drought, resulting in decreased rainfall in the southern and central parts of the island. The combined effects of El Niño and Positive IOD cause an even more significant decline in rainfall, with the dry season experiencing a substantial reduction compared to normal conditions. This study provides important insights for hydrometeorological risk mitigation in Kalimantan, highlighting the need for adaptive management in response to climate variability.

Item Type:	Article
Subjects:	Q Science > QC Physics > QC1-999 Physics #3 Repository of Lecturer Academic Credit Systems (TPAK) > Articles Access for TPAK (Not Open Sources) #3 Repository of Lecturer Academic Credit Systems (TPAK) > Corresponding Author
Divisions:	06-Faculty of Education and Educational Science > 84203-Physics Education (S1)
Depositing User:	Hamdi Akhsan
Date Deposited:	09 May 2025 08:19
Last Modified:	09 May 2025 08:19
URI:	http://repository.unsri.ac.id/id/eprint/171417

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