Previous work has established that warming is associated with an increase in dry static stability, a weakening of the tropical circulation, and a decrease in the convective mass flux. Using a set of idealized simulations with specified surface warming and superparameterized convection, we find support for these previous conclusions. We use an energy and mass balance framework to develop a simple diagnostic that links the fractional area covered by the region of upward motion to the strength of the mean circulation. We demonstrate that the diagnostic works well for our idealized simulations and use it to understand how changes in tropical ascent area and the strength of the mean circulation relate to changes in heating in the ascending and descending regions. We show that the decrease in the strength of the mean circulation can be explained by the relatively slow rate at which atmospheric radiative cooling intensifies with warming. In our simulations, decreases in tropical ascent area are balanced by increases in nonradiative heating in convective regions. Consistent with previous work, we find a warming‐induced decrease in the mean convective mass flux. However, when we condition by the sign of the mean vertical motion, the warming‐induced changes in the convective mass flux are nonmonotonic and opposite between the ascending and descending regions.

中文翻译：

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使用能量平衡框架了解热带上升对变暖的响应

先前的工作已经确定，变暖与干燥静态稳定性的增加，热带环流的减弱以及对流质量通量的降低有关。通过使用一组具有指定的表面变暖和超参数对流的理想化模拟，我们发现了对这些先前结论的支持。我们使用能量和质量平衡框架来开发一个简单的诊断程序，该诊断程序将向上运动区域所覆盖的分数区域与平均循环强度联系起来。我们证明了该诊断方法对于理想化的模拟效果很好，并用于了解热带上升区的变化和平均环流强度与上升和下降区域的热量变化之间的关系。我们表明，平均循环强度的下降可以用相对缓慢的速率来解释，大气辐射的冷却速率随着变暖而增强。在我们的模拟中，对流区域非辐射加热的增加平衡了热带上升面积的减少。与先前的工作一致，我们发现了由对流引起的平均对流质量通量下降。但是，当我们以平均垂直运动的符号为条件时，对流质量通量的变暖引起的变化是非单调的，并且在上升和下降区域之间是相反的。我们发现，平均对流质量通量的增加是由变暖引起的。但是，当我们以平均垂直运动的符号为条件时，对流质量通量的变暖引起的变化是非单调的，并且在上升和下降区域之间是相反的。我们发现，平均对流质量通量的增加是由变暖引起的。但是，当我们以平均垂直运动的符号为条件时，对流质量通量的变暖引起的变化是非单调的，并且在上升和下降区域之间是相反的。