Interaction Between Cens-Mjo Transition Phase Affect To Diurnal Anomaly Of The Rainfall Over West Java

Abstract

Cross-Equatorial Northerly Surge (CENS) mostly occurs in wet season period over West Java with the effect of developing convective activity and increase rainfall over northern West Java. Madden Julian Oscillation (MJO) in a transition period from the wet to the dry phase that affects probably the decrease of cloud cluster from Indian Ocean to West Java. The interaction between the CENS and Madden Julian Oscillation (MJO) in the transition phase was researched using 3 hourly rainfall of TRMM Satellite 3B42 for 10 years, from 2002 to 2013. The results of the average of 11 events showed that daily rainfall was concentrated over Java Sea in the morning until late afternoon. In the afternoon, high rainfall seemed to be identified in the southeastern part of West Java. In addition, rainfall anomaly data illustrates that in the early morning (01-04 LT), anomaliesof positive rainfall occured over the northern land and negative anomalies was over the Java Sea. Conversely, during noon (13-16 LT), the positive anomalies occured over the Java Sea while negative anomalies occured over the land. At night, the maximum positive anomalies occur over almost all parts of West Java.Hal. 14-2