EL NIÑO MODOKI IMPACTS ON RAINFALL ANOMALY IN PAPUA

• Main Author: Maria Kusumaningayu, Anna
• Format: Final Project
• Language: Indonesia
• Subjects: Geologi, hidrologi & meteorologi
• Online Access: https://digilib.itb.ac.id/gdl/view/33708
• Institution: Institut Teknologi Bandung

The new kind of El Niño phenomenon that known as El Niño Modoki has occurred more frequently during recent decades. It causes different impacts on rainfall in regions near Pacific compared with conventional El Niño. Thus, it is interesting to investigate El Niño Modoki spatial impacts on rainfall in Eastern Indonesia especially in Papua region. This study analyzes composite of Sea Surface Temperature (SST) in the equatorial Pacific using Hadley Centre Sea Ice and Sea Surface Temperature (HadISST) data and precipitation in Papua region using Global Precipitation Climatology Centre (GPCC) data reanalysis in the period of 1979-2010. That composite analyses has a purpose to proving the El Niño Modoki SST anomalies spatial pattern and identify rainfall anomalies spatial pattern in Papua during El Niño Modoki event. Then Singular Value Decomposition (SVD) analysis used to calculate the fraction of squared covariance between SST anomalies in the equatorial Pacific and rainfall anomalies over Papua. The composite analyses of SST and rainfall anomalies during MAM show reduction in rainfall over northern Papua and increase in rainfall over southern Papua, which consistent with SVD analysis. The SVD analysis of SST and rainfall reveals El Niño Modoki in second mode that accounts for 2,64% of the square covariance fraction on anomali rainfall in Papua