Transcript El Nino
El Nino ► Every three to eight years, a temporary change in the oceanic and atmospheric conditions occurs over the south Pacific Ocean. ► This change causes changes in temperature, rainfall, and storms throughout the entire world. What happens • Air pressure rises over the Indian Ocean, Indonesia, and Australia. • Air pressure falls over Tahiti and the rest of the central and eastern Pacific Ocean. • Trade winds in the south Pacific weaken or head east. • Warm air rises near Peru, causing rain in the deserts there. • Warm water spreads from the west Pacific across to the east Pacific. It takes the rain with it, causing rainfall in normally dry areas. Terms for Nike shoe and Test ► ► Gyre: A swirling vortex, particularly largescale wind and ocean currents. Example the Sargasso Sea Sargasso Sea is the Ocean gyre in the mid Atlantic made up of North Atlantic, Gulf Stream, Canary and North Equatorial Currents. Terms for Nike shoe and Test ► The turning of currents can create ocean eddies which one can think of as whirl pools. ► Generally they do not create giant whirl pools but are strong enough to create turbulent and unsettling waters. ► Counter currents are currents which flow opposite the wind.