GEOG 102 Lecture Notes - Lecture 7: Climatology, Primary Production, Data Hub
Document Summary
Seesaw in mass involving exchanges in air between eastern and western hemispheres centered in tropical and subtropical latitude. Soi is an index used to quantify the strength of an enso event. Calculated from the difference between sea level pressure (slp) at tahiti and darwin. Tahiti: high pressure gradient strong wind speed strong. Darwin: warm waters air rises lower pressure. Warm pool shifts east to tahiti (pressure at darwin higher) Together el nino (en) and the southern oscillation (so) = enso. Warm water to the west pacific- cooler water to the east pacific. Storms are concentrated in west pacific over the warm water. Trade winds pile up warm surface water in the west pacific ocean surface is about 0. 5 m higher at indonesia than ecuador. Equatorial countercurrent strengthens pushing warm water across equatorial region. Decreased upwelling leading to low-nutrient waters off peru.
