Marine science La Nina and El nino
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16 Terms
What is a ENSO?
El Nino southern Oscillation
How often does a ENSO occur?
every 3 to 7 years
Where does a ENSO occur
In the pacific
A change in wind patterns can resulting in
Ocean temperature differences, changes in ocean currents, changes in rain patterns, disrupt the food web
Under normal conditions how are the trade winds
Strong, they blow west across the pacific
Under normal conditions what happens to the warm water
Warm water piles up in the west (Australia and south east Asia)
When warm water piles up in the west
More evaporation, results in moisture/precipitation in the west and less evaporation in the east (dryer)
Under normal conditions where do up-wellings normally occur
coast of south america
El Nino winds
are weaker than than normal, making the eastern Pacific warmer
Why is the eastern Pacific warmer during El nino?
Warm waters are not pushed as far west. weaker up-wellings along south America.
during El nino does more or less precipitation occur
More evaporation/moisture/precipitation.
Why would food webs collapse
due to the less up-wellings there is less nutrients.
La Nina is
the opposite of El nino
During the la Nina trade winds are
stronger pushing more warm water west
Are upwelling stronger or weak in the east during nina
STRONGERRRRR
Western coast of N and south America are
dryer