Constrained work output of the moist atmospheric heat engine in a warming climate
Constrained work output of the moist atmospheric heat engine in a warming climate
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DOI：
10.1126/science.1257103
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发表时间：
2015-01-30
期刊：
影响因子：
56.9
通讯作者：
Doos, K.
中科院分区：
文献类型：
--
作者：
Laliberte, F.;Zika, J.;Doos, K.
传入和传出的太阳辐射与地球表面的热交换耦合，驱动天气模式，在地球仪周围重新分配热量和水分，创造了一个大气热机。在这里，我们调查发动机的工作输出使用热力学图计算再分析的观测和气候模式模拟与人为强迫。我们表明，工作输出总是小于一个等效的卡诺循环，它是由必要的权力，以维持水文循环的约束。在气候模拟中，水文循环比等效卡诺循环增加得更快。我们的结论是，在温暖的气候水文循环的加剧可能会限制热机的能力，产生的工作。
Incoming and outgoing solar radiation couple with heat exchange at Earth's surface to drive weather patterns that redistribute heat and moisture around the globe, creating an atmospheric heat engine. Here, we investigate the engine's work output using thermodynamic diagrams computed from reanalyzed observations and from a climate model simulation with anthropogenic forcing. We show that the work output is always less than that of an equivalent Carnot cycle and that it is constrained by the power necessary to maintain the hydrological cycle. In the climate simulation, the hydrological cycle increases more rapidly than the equivalent Carnot cycle. We conclude that the intensification of the hydrological cycle in warmer climates might limit the heat engine's ability to generate work.