Respective Influences of the Indian Ocean Dipole and El- Niño-Southern Oscillation on the Indonesian Precipitation

Lestari, Deni Okta and Sutriyono, Edy and Kadir, Sabaruddin and Iskandar, Iskhaq (2018) Respective Influences of the Indian Ocean Dipole and El- Niño-Southern Oscillation on the Indonesian Precipitation. Journal of Mathematical and Fundamental Sciences, 50 (3). pp. 257-272. ISSN 23375760

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Abstract

The respective influences of the Indian Ocean Dipole (IOD) and El Niño-Southern Oscillation (ENSO) on Indonesian precipitation were evaluated using monthly precipitation data from the Global Precipitation Climatology Centre (GPCC) for January 1948 to December 2013. Simultaneous correlation between seasonal precipitation anomalies and climate indices for these two types of climate modes revealed that IOD events have a significant correlation with the precipitation over southern Sumatra, Java, southern Kalimantan, the Nusa Tenggara Islands, some parts of Sulawesi and eastern Papua. Meanwhile, ENSO events have a significant correlation with the precipitation over southern Sumatra, Java, Kalimantan, Sulawesi, and Papua. Droughts during the dry season (JJA and SON) typically occur when a positive IOD event simultaneously occurs with an El Niño event associated with anomalous low SST observed in the Indonesian seas and the southeastern equatorial Indian Ocean. Low SST anomalies lead to low-level wind divergence and reduce water vapor in the lower atmosphere, supress atmospheric convection over the Indonesian region and then cause a decrease in precipitation.

Item Type:	Article
Subjects:	G Geography. Anthropology. Recreation > GE Environmental Sciences > GE1-350 Environmental sciences
Divisions:	11-Postgraduates Study > 95029-Environmental Science (S3)
Depositing User:	Ph.D. Sabaruddin Kadir
Date Deposited:	27 Apr 2023 05:15
Last Modified:	27 Apr 2023 05:15
URI:	http://repository.unsri.ac.id/id/eprint/97304

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