Question 1: Given the following information for a planet in another solar system, calculate the planet's radiative equilibrium temperature (in °C). In this solar system, the sun has a radius of 500,000 km, and it emits 25,000,000 W/m2. The planet has an albedo of 21 per cent and it is 76,000,000 km from its sun.
Question 2: At noon, incoming solar radiation (K↓) is 625 W/m2, and incoming longwave radiation (L↓) is 345W/m2. Given that the surface temperature is 17ºC, the surface albedo is 12 percent, and the surface emissivity is 0.94, what is the net radiation? (Ignore surface reflection of longwave radiation.)