question attached

The following graph shows the inow and outflow of heat energy from the Earth as it relates to the Earth's surface temperature. (a) Describe in your own words why the graph of the inow has this shape? (b) There are three equilibrium temperatures indicated in the plot, A, B, and 0. Which are stable? Which are unstable? (c) Suppose that we reduced the strength of the greenhouse effect {for example, by somehow reducing the amount of C02 in the atmosphere). Which curve would this directly affect: the inow or the outow? (d) Describe the effect: Does it increase or decrease the associated ow? to) What would this look like on the graph? Sketch a possible ow that would represent this change {a ow that is either a little higher or a little lower than the corresponding ow, as appropriate. 400 Inow Outow (g : 1) $20 240 260 280 300 320 T temperature (kelvins)