La nina

Question 1

define La nina

Answer 1

a weather pattern where the ocean surface cools along the tropical pacific coast and South America.

Question 2

How does La nina relate to the walker circulation

Answer 2

La nina is an enhanced or supercharged version of the walker circulation

Question 3

Steps of an La nina event

Answer 3

• The trade winds blow more strongly then usual
• warm water pools along the north east Australia and indonisia
• This leads to more evaportaion, condensation and precipitation
• the leeuwin current is supercharged and is pushed all the way around western australia
• peruvian current upwells cold water from antarctica to american coastline.

Question 4

Effects of La nina on Eastern australia

Answer 4

floods
tropical cyclones
monsoons

Question 5

Effects of La nina on western australia

Answer 5

-Warm water passes through to western australia supercharging the leeuwin current
- increase in temperatures can cause death of marine life and coral bleaching

Question 6

Effects of La nina of on america

Answer 6

-Drought
- increased upwelling bringing nutrients and wildlife to america
positive fisheries and economic benefit.

Question 7

Effects on biodiversity

Answer 7

La nina brings increased rainfall which creates vital breeding spaces and food availabilty.
boosts native wildlife

Question 8

effects on marine life

Answer 8

cause marine heatwaves which leads to coral bleaching and affecting fisheries.

Question 9

effects on commercial fishing

Answer 9

waters in northern Australia heat up as warm water is pushed west.