CURRENT AFFAIRS

2023

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Why do El Nino and La Nina patterns mainly effect Eastern Australia, more so than Western Australia?
A
Ocean currents off of Western Australia do not move as quickly as ocean currents off of Eastern Australia.
B
Because ocean currents are too weak to bring El Nino and La Nina to Western Australia.
C
El Nino and La Nina actually have more of an impact on Western Australia than Eastern Australia.
D
These patterns are associated with the Pacific Ocean. Western Australia is located near the Indian Ocean.
Explanation: 

Detailed explanation-1: -El Niño years are typically warmer and drier over eastern Australia and La Niña years tend to be cooler and wetter over much of the country. When El Niño coincides with a positive IOD, the two phenomena can reinforce their dry impacts.

Detailed explanation-2: -In general, El Niño conditions lead to wetter, snowier conditions in Amarillo and cooler maximum temperatures during the winter. La Niña conditions lead to drier and warmer temperatures overall, with notable extreme cold spells. In stronger El Niño or La Niña episodes, these trends are even greater.

Detailed explanation-3: -The changes in sea surface temperatures during El Niño and La Niña are caused and helped along by changes in the trade winds, which normally blow from east to west across the tropical Pacific Ocean.

Detailed explanation-4: -During a La Niña, strong trade winds blow west across the Pacific Ocean. Warm surface water is pushed towards Asia and the seas north of Australia, resulting in higher rainfall than normal across the country’s north-east.

There is 1 question to complete.