There is a very strong relationship between the El Niño Southern Oscillation, (this includes both El Niño and La Niña events), and the seasonal weather patterns in South East Asia.
Climate scientists do not yet know how climate change may affect the El Niño Southern Oscillation . However, given its importance to the regional weather patterns, temperatures and precipitation, there is the potential for climate change to have a significant effect on the region should it alter frequency or intensity.
Collins, M., D. Frame, B. Shinha, and C. Wilson, 2002: How far ahead could we predict El Niño? Geophys. Res. Lett., 29 (10), 1492, doi:10.1029/2001GL013919.
Paeth, H, A. Scholten, P. Friederichs, A. Hense, 2008: Uncertainties in climate change prediction: El Nino Southern Oscillation and monsoons, Global and Planetary Change, 60, 265-288.
Trenberth, K. E. and T. J. Hoar, 1997: El Nino and climate change. Geophys. Res. Lett. 24, 3057-3060.