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In this quiz, you will use this key figure from Lecture 3.2 to study the Earth's current energy budget. For all questions, use the best estimate (large number), and ignore the range shown in parentheses. incoming Units (Wm2) solar TOA 340 (340, 341) 79 (74,91) solar absorbed atmosphere solar down surface imbalance 0.6 (0.2, 1.0) IPCC AR4, Fig. 2.11 100 (96, 100) 185 (179, 189) (22,26) 24 sola 161 (154, 166) solar reflected TOA solar absorbed surface latent heat 100 ********* reflected" surface 84 20 (70, 85) (15, 25) evapo- ration sensible heat 2000¹ 398 (394, 400) thermal up surface thermal outgoing TOA 239 (236, 242) atmospheric window greenhouse gases 342 (338, 348) thermal down surface
What is the longwave radiation emitted by the surface (in Wm-²)? 398 Question 5 What is the "greenhouse forcing" - the difference between the radiation that would be emitted to space if there were no atmosphere (but the same surface temperature), and the terrestrial radiation emitted by the planet currently? Units are Wm-2, and the number should be positive, rounded to the nearest whole number. 56 2 pts Question 6 2 pts What is the current energy imbalance at the top of the atmosphere? Units are Wm-², input a number only.