This scheme shows a good performance now,
but after another 6 years(and 2 new El Niños) it may not look nearly as good,
and they will have to change something to restore skill,” he said.
These extreme El Niños are likely to increase from one event every 20 years,
as scientists recorded over 99 years to 1990, to one every 10 years by the turn of the century, which means the monsoons may witness large-scale fluctuations.