Earth's Energy Balance
地球的能量平衡
This graphic was modeled after Kiehl and Trenberth's estimate of the Earth's annual global mean energy budget. Note that the mean incident power per square meter is 342 watts, and that for thermal equilibrium the reradiated power must also be 342 watts/m2. Kiehl & Trenberth's division of that re-radiated power is 107 watts/m2 of reflected sunlight and 235 watts/m2 of long wavelength radiation (infrared).
这张图是根据Kiehl和Trenberth对地球年度全球平均能量预算的估算而设计的。请注意，每平方米的平均入射功率是342瓦，且为了热平衡，再辐射的功率也必须是342瓦/平方米。Kiehl和Trenberth将这部分再辐射的功率分为107瓦/平方米的反射阳光和235瓦/平方米的长波辐射（红外线）。
| Radiative forcing which tends to change balance
倾向于改变平衡的辐射强迫 |
| Increase in greenhouse gases
温室气体增加 | Greenhouse effect
温室效应 |
References
Kiehl & Trenberth
Brohan, et al.
索引参考 Kiehl & Trenberth Brohan, et al.
| HyperPhysics***** Thermodynamics
HyperPhysics ***** 热力学 | R Nave |
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