Weakening of the Pacific Walker Circulation during an El Niño event primarily results in which climatic effect?

💡 Explanation:

El Niño involves a warming of the central and eastern tropical Pacific, which weakens the pressure gradient driving the Walker Circulation (trade winds). This shift in atmospheric convection leads to suppressed rainfall and drought conditions in the Western Pacific (e.g., Southeast Asia, Australia) and increased precipitation and flooding in the Eastern Pacific (e.g., Peru, Ecuador).