el nino southern oscillation Flashcards
describe the walker circulation
the walker circulation is an east-west circulation of the atmosphere above of tropical pacific, with air rising over the cooler ocean regions (west) and decending over the cooler ocean regions (east)
draw a diagram of the walker circulation
draw in books
draw a diagram of El Nino
draw in books
draw a diagram of La Nina
draw in books
effect of El nino on america
-more warm water stops the upwelling of cold water in the perivian current, haviung negative effects on wildlife and fisheries
- less nutrients causing species at the bottom of the food chain to die-off
- more rain and flooding
- storms
effect of El Nino on eastern australia
-droughts
-fires
-stroms
-heatwaves
effect of El nino on western autralia
leewuin current gets weaker and cooler leading to a reduction in species relying on it for movenment
effect of La Nina on america
- droughts
- increased wildlife and nutrients
-positive fisheries and economic benifit
effect of La Nina on eastern australia
- floods
- tropical cyclones
- monsoons
effect of La Nina on western australia
- benificial to lobster fisheries
- coral bleaching
- supercharged leewuin current
steps to la nina
- strong trade winds blow west, across the pacific ocean
- these trade wins cause large amounts of cool water to flow west along the equator where it is heated by the sun.
- large pools of warm water are formed on the coast of east northern australia
whata happens to the leeuwin current when an la nina event occurs
the leeuwin current is supercharged
what happens to the periviun current when a la nina event occurs
upwells water from antarctica to america coastline
steps to el nino
- trade winds weaken or reverse
- these tracde winds cause cool water to flow east along the equator ehere the water is warmed
- warm water displaces cool water that is usually on the near surafce of the eastern pacific.
- pools of warm water form off the coast of america.
