Which of the following is not associated with el nino?
None.
To determine which of the following options is not associated with El Niño, we need to first understand what El Niño is.
El Niño is a climate pattern characterized by abnormal warming of surface ocean waters in the eastern tropical Pacific Ocean. It typically occurs every 2-7 years and has wide-ranging impacts on global weather patterns. It is a part of a larger oscillation called the El Niño-Southern Oscillation (ENSO) cycle.
Now, let's go through the given options to identify the one that is not associated with El Niño:
Option 1: Intense rainfall and flooding along the west coast of South America.
El Niño is associated with an increased risk of heavy rainfall and subsequent flooding along the west coast of South America. Therefore, Option 1 is associated with El Niño.
Option 2: Dry conditions and drought in Southeast Asia.
During El Niño, the normally rainy regions of Southeast Asia may experience reduced precipitation and prolonged drought conditions. Therefore, Option 2 is associated with El Niño.
Option 3: Strong trade winds in the Pacific Ocean.
El Niño is characterized by weakened trade winds in the Pacific Ocean. These trade winds, which blow from east to west across the equatorial Pacific, weaken during El Niño events. Therefore, Option 3 is also associated with El Niño.
Option 4: Decreased coral bleaching events in the Great Barrier Reef.
Coral bleaching is caused by changes in ocean temperature and is not directly associated with El Niño. While warmer ocean temperatures can contribute to coral bleaching, El Niño is specifically related to the warming of surface waters in the eastern tropical Pacific Ocean. Therefore, Option 4 is not associated with El Niño.
In conclusion, the option that is not associated with El Niño is Option 4: Decreased coral bleaching events in the Great Barrier Reef.