1) What is the radiative forcing. delta F. in (a-c) below?
Match the three scenarios with these three amounts:
4.37 W/m2, 1.32 W/m2, or 0.1 W/m2
(a) increasing CO2 from 300 to 370?
(b) increasing CO2 from 300 to 600?
(c) Roughly the consequences of sunspot activity in a decade in the 20th century with above average activity compared to the long term mean?

2) How does the climate respond to a reduction in the net radiation at the top of the atmosphere by 1.32 W/m2? Choose the best answer:
(a) It warms somewhat.
(b) It warms until the outgoing longwave radiation increases enoug to reestablish zero net radiation at the top of the atmosphere.