el nino and la nina

Question 1

what is la Nina and when does it occur

Answer 1

strong trade winds, blowing east to west, reduce surface temperatures. occurs every 3-5 years

Question 2

what is El Nino and when does it occur

Answer 2

weak trade winds blowing east to west , increase in surface temperatures in the eastern pacific. occurs every 3-7 years

Question 3

what does la Nina cause

Answer 3

heavy rainfall and floods in the west ad droughts in the east

Question 4

what does El Nino cause

Answer 4

increase sea temperatures

Question 5

what are 2 consequences of el nino

Answer 5

more tropical storms in the pacific
more droughts in asia
changes to world precipitation patterns

Question 6

what are 2 consequences of la nina

Answer 6

-weaker tropical storms in the pacific
-stronger tropical storms in the Atlantic
-droughts in south America

Question 7

how does an El Nino effect cause dry weather in some places

Answer 7

sinking air in the high pressure area over western pacific which can cause droughts

Question 8

how does an El Nino effect cause wet weather in some places

Answer 8

rising air in the low pressure area over the eastern pacific which causes floods