Lecture 8 - Global Climate Change

Question 1

earth would be .. cooler without greenhouse effects

Answer 1

-33c

Question 2

The last year Earth was cooler than 20th century temperature average was ..

Answer 2

1976

Question 3

Net radiative forcing is the difference of .. absorbed by Earth and energy … back to …

Answer 3

insolation

radiated, space

Question 4

when considering global warming, its important to look at .. temperature

Answer 4

ocean

- most warming is by ocean

Question 5

the link of CO2 to climate change was first suggested by ..

Answer 5

Revelle

Question 6

The Keeling curve is a tracker of .. … over many ..

february 2018 ppm reading is ..

Answer 6

CO2 concentration (ppm), years

408.59

Question 7

…% of GHG are CO2
…% of GHG are CH4
…% of GHG are N2O

Answer 7

76,
16,
6

Question 8

N2O emissions are primarily from ..

Answer 8

agriculture

Question 9

CO2 emissions are primarily from .., … and … processes

respectively totally ..%, ..% and ..% of emissions

Answer 9

electricity, transport and industrial processes

41%, 22%, 20%

Question 10

Global warming potential compares … .. .. over a specified period of time relative to ..

Answer 10

integrative radiative forcing

CO2

Question 11

The integrative forcing number of N2O, CH4 and CO2 are …, … and … respectively

Answer 11

298, 25, 1

Question 12

2010 top . warmest years since records began at ..

Answer 12

3, 1850

Question 13

biogenic sources are >..% of global emissions

Answer 13

70

-wetlands, rice, live stock, termites etc.