A thermal model of the sailback pelycosaur
A thermal model of the sailback pelycosaur
复制标题
帆背盘龙的热模型
作者：
Steven C. Haack
应用能量交换分析的标准技术来模拟几种帆背龙的热状况。特别令人感兴趣的是帆在体温调节中所起的作用。尽管风帆确实提高了模型在早上变暖的速度，但其有效性低于之前的估计。风帆通常使白天的内部温度升高3°C至6°C。体型较大的受试者的温度升幅最大，部分原因是他们的热惯性较高，部分原因是他们的帆过大。风帆对夜间最低温度没有影响。在二叠纪环境中，过热似乎不是一个重要的问题，特别是考虑到模拟对象的热惯性很高。当发生过热时，风帆排出过热的价值有限。
Standard techniques of energy exchange analysis are applied to modelling the thermal regimes of several species of sailback pelycosaurs. Of particular interest is the role played by the sail in thermoregulation. Although the sail did increase the rate at which the model could warm up in the morning, its effectiveness fell short of previous estimates. The sail increased the daytime internal temperature by typically 3°C to 6°C. The more massive subjects had the highest temperature increases owing partly to their higher thermal inertia and partly to their disproportionately large sails. The sail had no impact upon the nocturnal minimums in temperature. Overheating does not appear to have been a significant problem in the Permian environment, particularly in view of the high thermal inertia of the subjects modeled. When overheating occurred, the sail was of limited value for dumping excess heat.