Which effect dramatically alters ocean currents and weather patterns during an El Niño event?

💡 Explanation

During an El Niño event, a weakening of the trade winds occurs because the pressure gradient between the eastern and western Pacific reverses, reducing wind strength. Therefore, a weakening of trade winds best describes this, rather than upwelling intensification, jet stream strengthening, or thermohaline increase, representing distinct oceanic changes.

• Which effect occurs due to Earth's rotation on large-scale wind patterns near the equator?
• Which mechanism causes crustal thickening when compressive forces occur at continental convergent plate boundaries?
• Which outcome occurs when pore pressure rises rapidly during seismic shaking?
• Which geological outcome primarily results from magma with high silica content and dissolved gases reaching Earth's surface?
• Which process restricts nutrient upwelling within subtropical ocean gyres under stable stratification?
• Which outcome increases when concentrated animal feeding operations discharge wastewater onto karst topography?