Modulation of the South China Sea and Maritime Continent precipitation by the 
Madden-Julian Oscillation and Convectively Coupled Equatorial waves / 盧孟明 
博士 (台灣大學 大氣科學系)
	
The South China Sea (SCS) and Indo-Pacific Maritime Continent (MC) has received 
tremendous scientific interest for its unique role in Asian-Australian and 
Indian-western Pacific monsoons. The specific interest of the present study is 
on weather and climate variability and predictability on the sub-seasonal (10-90 
day), seasonal and interannual time scales. SCS-MC is one of the major 
equatorial atmospheric convection centers. Rossby wavetrains excited by the 
convection in this region can emanate toward higher latitudes and influence the 
weather patterns in Northeast Asia and North America. On the other hand, the 
accumulated effect of the atmospheric upward motion associated with SCS-MC 
convection is a key ingredient of ENSO variability.  Stimulated by the South 
China Sea (SCS) Two-Island Monsoon Experiment (SCSTIMX) intensive observation 
project supported by MOST, we analyzed the global reanalysis data and 
high-resolution gridded precipitation over the SCS-MC region from 1998-2017 to 
understand how the regional precipitation can be modulated by the Madden-Julian 
Oscillation (MJO) and convectively coupled equatorial waves (CCEW). The 
preliminary result suggests that on average the MJO shows strongest modulate on 
the precipitation, but the CCEWs show strong influence on the extreme events. 
The implication to extended-range weather forecast will be discussed.