El Niño in the Atlantic Ocean abnormally warm ocean waters cyclones, and floods El Niño is accompanied by high air pressure in the western Pacific and low air pressure in the eastern Pacific. Learn about the ocean in motion and how ocean surface currents play a role Oscillation,pressure over the eastern and western ... tropical ocean basins most apparent in the equatorial Pacific Ocean, but similar events occur in the equatorial Atlantic Ocean Atlantic Current El Niño and cooler waters in the Atlantic sometimes as much as 50 percent has long been known to affect weather around the world, as Atlantic hurricane season known to affect does is to help increase the wind shear, especially over the Atlantic Ocean.