Analysis of El Ni?o and IOD Phenomenon 2015/2016 and Their Impact on Rainfall Variability in Indonesia

Humanosphere Science School 2017; 7th International Symposium for a Sustainable Humanosphere

地球科学;经济学

Avia, L.Q.^1 ; Sofiati, I.^1

Center of Atmospheric Science and Technology, Indonesian National Institute of Aeronautics and Space (LAPAN), Jl. Dr. Djundjunan 133, Bandung

40173, Indonesia^1

关键词: Dry seasons;    Eastern pacific;    Indian ocean;    Indian ocean dipoles;    Meteorological drought;    Pacific ocean;    Rainfall variability;    Sea surface temperature anomalies;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/166/1/012034/pdf
DOI  :  10.1088/1755-1315/166/1/012034

来源: IOP

【 摘 要 】

The El Niño phenomenon that occurs in 2015/2016 fell into category of strong intensity. The El Niño phenomenon had a very large impact on meteorological droughts in Indonesia. The aim of this study is to determine the dynamics of the atmosphere and the sea during the phenomenon of El Nino 2015/2016 and its impact on rainfall in the Indonesia region. The research methods consisted of several steps, in order to obtain an overview of the spatial conditions of rainfall during the El Niño period, data processing of both accumulation and anomaly of rainfall per-season (MAM, JJA, SON, DJF) were evaluated. The results showed that strong intensity of the El Niño occurred from early July 2015 to early March 2016. The shift of the convection center occurred in the Pacific Ocean during this period where the sea surface temperature anomaly in the eastern Pacific appeared warmer 2-3°C than normal temperature (1981-2010). In 2015, the positive Indian Ocean Dipole (IOD) also occurred in the Indian Ocean from August to November. These phenomena resulted wider drought impacts throughout Indonesia especially during the transition from dry season to wet season period (September-November).