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{News} 080610 Dipole lends odds-on chance for surplus rain
Dipole lends odds-on chance for surplus rain The Hindu Business Line, June 10, 2008 Vinson Kurian Thiruvananthapuram, June 9 A rare third-in-a-row positive Indian Ocean Dipole (IOD) event unfolding in the equatorial Indian Ocean could just be the trigger the monsoon needs to fire on all cylinders and deliver more rain than what long-range forecasts seem to credit it with. The Indian monsoon is known to thrive when it is rear-ended by a positive IOD, which arises from an anomalous warming of the West Indian Ocean in contrast with a cooling anomaly to the east. The pattern is reversed during a negative IOD. “We may expect an above normal monsoon year but we should note that the evolution of IOD might be adversely affected by strong intra-seasonal disturbances,” Dr Toshio Yamagata and Dr Swadhin Behera of the Tokyo-based Frontier Research Centre for Global Change (FRCGC) told Business Line. The FRCGC is credited with the discovery of the IOD phenomenon.EXTREMELY RARE It is extremely unus...
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