Answer:
During normal years energy transfers from the ocean to the air. However, during El Nino years, the current is not as warm, so less energy will transfer from the current to the air, making Christchurch cooler than usual. During El Niño years, the normal prevailing winds are disrupted.
Explanation:
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The temperature is cooler during el nino years in new Zealand due to the prevailing winds coming from the South Pole or the North Pole.
At the time of el nino the current passing from the Equator to Ne Zealand is not generally warm which leads to less energy transfer to the air of the nation and disruption in prevailing winds.
Thus, this disruption of the normal winds leads to cooler air and temperature in Christchurch due to rainfall and snow.
Learn more about el nino years and temperature in Newzealand here:
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