Morlet’s Wavelet analysis on El Niño Southern Oscillation (ENSO) and the Indian Ocean Dipole (IOD) for 84 years: 1940 2023 (Similarity)

Akhsan, Hamdi (2024) Morlet’s Wavelet analysis on El Niño Southern Oscillation (ENSO) and the Indian Ocean Dipole (IOD) for 84 years: 1940 2023 (Similarity). Turnitin Universitas Sriwijaya.

Text 3.MORLETS WAVELET ANALYSIS ON EL NIÑO SOUTHERN OSCILLATION (ENSO) AND THE INDIAN OCEAN DIPOLE (IOD) FOR 84 YEARS 2024_9.pdf.pdf - Published Version Download (3MB)

Abstract

s is known, the impact caused by El Niño Southern Oscillation (ENSO) and the Indian Ocean Dipole (IOD) can reach extreme levels, especially rainfall in Indonesia. So, updating information on events and cycles of these phenomena is essential. Using Sea Surface Temperature (SST) data spanning the previous 84 years (1940–2023) from ERA5, we examined Sea Surface Temperature Anomalies (SSTA), which serve as a predictive tool for ENSO and IOD events. Apart from that, in this research, SSTA variance analysis was also carried out using Wavelet. The analysis results show several Positive IOD-Like events (1943, 1944, 1977, 1996) and Negative IOD-Like (1985, 1992, 2016). Apart from that, the results of this research also show that El Niño in 2002/03 coincided with Negative IOD in 2002. The results of Wavelet analysis show that the SSTA DMI variance experienced increased activity in the periods 1940-1968, 1969-1991, and 1992-2023. The Wavelet analysis also shows that ENSO activity increased in 1970-2000 and decreased again in 2000-2023.

Item Type:	Other
Subjects:	#3 Repository of Lecturer Academic Credit Systems (TPAK) > Results of Ithenticate Plagiarism and Similarity Checker
Divisions:	06-Faculty of Education and Educational Science > 84203-Physics Education (S1)
Depositing User:	Hamdi Akhsan
Date Deposited:	17 May 2025 00:30
Last Modified:	17 May 2025 00:30
URI:	http://repository.unsri.ac.id/id/eprint/171488

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