Lecture 3

Question 1

What emissions does agriculture account for?

Answer 1

50% of anthropogenic methane emissions

80% of anthropogenic N2O emissions

Question 2

Climate change and phenology changes

Answer 2

Increase in mean global temperature associated with average enhancement in phenology of life history events

Question 3

Climate change and migration

Answer 3

Animals spend more time further north

Question 4

Paris Climate Accord

Answer 4

December 2015
International pledge to limit global warming to below 2 degrees
Pursue efforts to limit the global temperature increase to 1.5 degrees Celsius
All parties must report emissions on a regular basis

Question 5

What panel released a Special Report on Global Warming of 1.5 degrees?

Answer 5

Intergovernmental Panel on Climate Change
91 authors, 49 countries
2017
What are the impacts of limiting warming to 1.5 degrees compared to 2 degrees?
What is required to achieve this?

Question 6

Outcome of extreme weather on agriculture

Answer 6

Reduced food availability in the Sahel, southern Africa and the Mediterranean

Question 7

Impacts of 1.5 degree increase on oceans compared to 2 degrees

Answer 7

10-30% coral reefs survive at 1.5 degrees, virtually gone at 2 degrees
Increased acidity and declining oxygen levels affect biodiversity and fisheries
Chance of Arctic sea-ice summer increases to 1-in-10 years at 2 degrees
Sea levels 10cm less at 1.5 degrees (10 million fewer people exposed to risk)

Question 8

How to limit warming to 1.5 degrees

Answer 8

Can only put additional 750 GtCO2 into atmosphere (15 years of current emissions)