Tuesday, March 23, 2010
A quick look at the current El-Nino position: Active and persistent.
The Monthly SOI from May to Dec 2009, is -5.1, -2.3, 1.6, -5.0, 3.9, -14.7, -6.7, -7.0, and for the JAN/FEB 2010 -10.1, -14.5.
Negative figures in June, and August last year indicate the emerging El-Nino. Now, the 30-day Southern Oscillation Index [SOI] to 20 March was -10.
What we need a positive SOI from May onwards for a healthy monsoon.
Normally, regions affected by El Nino weather pattern are Myanmar, Laos, Thailand, Vietnam, Cambodia, Singapore, northern Sumatra, Sarawak and Sabah.
India 's monsoon link to El-Nino has never been proved. But I would say for certain that all drought years were El-Nino years,though all El-Nino years did not prove drought years. Sure, El-Nino years did give sparse rains and a deficit monsoon.
The typical impacts of El Nino over the Southeast Asian region come in the form of unusual and prolonged dry conditions: this is particularly the case in the Indonesia region and Borneo Island.
Even though El Nino started sometime duringJune 2009 as announced by established global climate centres, the periodic dry of the weather continues into Feb 2010.It is forecasted to be over by May.
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