Positive/Negative feedbacks

Question 1

How is increase in CO2, which leads to ocean salnity decrease a positive feedback.

Answer 1

Ocean salinity - increase in CO2 leading to warming ocean and melting of ice which leads to less saline water and possible collapse of thermohaline conveyor.

Question 2

How is Albedo positive feedback

Answer 2

Albedo - increase in CO2 leading to warming ocean, therefore less ice and less albedo therefore more warming.

Question 3

How is Permafrost positive feedback

Answer 3

Permafrost - higher temperatures leads to melting therefore more CO2 and more warming.

Question 4

How is global warming positive feedback

Answer 4

Global warming - increase in temperature leads to more evaporation, therefore more water vapour (GHG) therefore more warming.

Question 5

How is ocean warming positive feedback for climate change?

Answer 5

Warmer oceans leads to reduction in absorption of CO2.
More CO2 in atmosphere.

Question 6

How is carbon fertilisation negative feedback for climate change?

Answer 6

Carbon fertilisation - increase CO2, leads to increase in plant growth and absorption of CO2 and therefore less in the atmosphere.