熵能函数与全球平均气候状态——一个地气系统熵交换的条件极小值纬向平均热力学模式

李天时

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高原气象 ›› 1985, Vol. 4 ›› Issue (3) : 221-229.
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熵能函数与全球平均气候状态——一个地气系统熵交换的条件极小值纬向平均热力学模式

  • 李天时
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ENTROPIC ENERGY FUNCTION AND THE MEAN GLOBAL CLIMATE——A MEAN ZONAL THERMODYNAMIC MODEL CONSTRAINED BY THE MINIMUM ENTROPY EXCHANGE PRINCIPLE

  • Li Tianshi
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摘要

本文依据G.W.Paltridge最小熵交换假说,提出了熵能函数的概念,并对Paltridge(1978)模式(以下简称P模式)中的部分参数作了修改,使其物理意义更为明确。文中运用不同于P模式的计算方法,求得了全球纬向平均的气候参量场(地表温度、云量、水平能量流)。最后,对模式敏感性作了一些试验,结果表明,大气中二氧化碳含量若增加到现时值之二倍,地面温度将平均升高最大不超过1℃,这与国外不少学者从能量平衡气候模式所得结果一致。

Abstract

On the basis of Paltridge's 'minimum entropy exchange' principle, a new concept-entropic energy function-is presented in this paper. Most of the parameters used in Paltridge's model are induced, but some of them are revised in order to make their physical meanings much clearer. With a constraint of minimizing the 'entropic energy function', we have obtained a zonal average distribution of surface temperature T, cloudness θ and meridional flux of energy, which is coincided with the observations. Sen-sitivity experiment shows that if the content of CO2 in the atmosphere is doubled,the surface temperature would be 0.8°K higher.It is in agreement with some of the energy balance models.

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李天时. 熵能函数与全球平均气候状态——一个地气系统熵交换的条件极小值纬向平均热力学模式. 高原气象. 1985, 4(3): 221-229
李天时. ENTROPIC ENERGY FUNCTION AND THE MEAN GLOBAL CLIMATE——A MEAN ZONAL THERMODYNAMIC MODEL CONSTRAINED BY THE MINIMUM ENTROPY EXCHANGE PRINCIPLE. Plateau Meteorology. 1985, 4(3): 221-229

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