ENSO Winter Precipitation (cm/month)

How does ENSO affect Indonesian

Precipitation?• ENSO SST anomalies in ENSO SST anomalies in the eastern and central the eastern and central Tropical Pacific cause an Tropical Pacific cause an eastward shift in eastward shift in convection from the west convection from the west Pacific and Indonesia to Pacific and Indonesia to the central Pacificthe central Pacific

• The resulting circulation The resulting circulation change induces increased change induces increased subsidence (decreased subsidence (decreased rainfall) over Indonesia.rainfall) over Indonesia.

Java Precipitation during ENSOJava Precipitation during ENSO

Monsoon onset is Monsoon onset is delayed during ENSO delayed during ENSO

warm events.warm events.

After monsoon onset, After monsoon onset, ENSO has little effect ENSO has little effect

on precipitation.on precipitation.

The delayed monsoon The delayed monsoon onset results in onset results in

reduced cumulative reduced cumulative rainfall through wet rainfall through wet

season.season.

ENSO and rice production in IndonesiaENSO and rice production in Indonesia

Warm events: Warm events: Delays rice planting Delays rice planting dates. Cold events dates. Cold events

opposite.opposite.

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