El nino + La nina Flashcards
1
Q
What are the 2 causes of extreme weather conditions?
A
El Nino and La Nina
2
Q
Where does El Nino affect?
A
The Pacific region every few years
3
Q
Does El Nino or La Nina bring warm waters to North Peru and Ecuador in late December?
A
El Nino
4
Q
What are the effects of El Nino?
A
- reversal of wind patterns across the pacific
- causing drought in Australasia
- unseasonal heavy rain in South America
5
Q
What are the 4 main stages of El Nino?
A
- trade winds weaken
- water from Australia moves back to eastern pacific. this prevents cold water rising and reduces fish stocks
- warmer water in peru leads to rising warm air, low pressure and more rainfall - results in flooding
- high pressure over Australia brings dry conditions resulting in droughts.
6
Q
What are the 3 important points about La Nina?
A
- happens after El Nino. Can be described as an exaggerated version of a normal year
- australia may experience flooding
- sea temperatures are cold in peru
