Final answer:
Strong El Niño events are associated with weaker trade winds and warmer sea surface temperatures in the eastern Pacific, which disrupt normal weather patterns. Increased rainfall in Australia is not directly related as it usually experiences less rainfall during El Niño. Also, the expansion of the West Wind Drift is more linked to general wind circulation patterns.
Step-by-step explanation:
A strong El Niño event, which is a disturbance in the climate system resulting from the warming of the sea surface temperature in the Pacific Ocean, is related to a number of conditions. These include weaker trade winds and warmer sea surface temperatures in the eastern Pacific Ocean. These two factors can disrupt the normal weather patterns worldwide, leading to increased rainfall in some areas and drought in others. Interestingly, Australia typically sees less rainfall during El Niño events, not more, so increased rainfall in Australia is inversely related to a strong El Niño. Conversely, the West Wind Drift expansion isn't directly linked to El Niño as it pertains more to the general wind circulation patterns in the Southern Hemisphere.
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