| Entropy budget of the earth, atmosphere and ocean system |
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| 作者姓名： | GAN Zijun YAN Youfangan QI Yiquan |
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| 作者单位： | LED, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China,LED, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China,LED, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China |
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| 摘 要： | The energy budget in the system of the earth, atmosphere and ocean conforms to the first law of thermodynamics, namely the law of conservation of energy, and it is balanced when the system is in a steady-state condition. However, the entropy budget following the second law of thermodynamics is unbalanced. In this paper, we deduce the expressions of entropy flux and re-estimate the earth, atmosphere and ocean annual mean entropy budget with the updated climatologically global mean energy budget and the climatologically air-sea flux data. The calculated results show that the earth system obtains a net influx of negative entropy (-1179.3 mWm-2K-1) from its surroundings, and the atmosphere and the ocean systems obtain a net input of negative entropy at about -537.4 mWm-2K-1 and -555.6 mWm-2K-1, respectively. Calculations of the entropy budget can provide some guidance for further understanding the spatial-temporal change of the local entropy flux, and the entropy production resulting from all kinds of irreversible processes inside these systems.
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| 关 键 词： | system thermodynamics energy entropy flux |
Entropy budget of the earth, atmosphere and ocean system |
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| GAN Zijun,YAN Youfangan,QI Yiquan.Entropy budget of the earth, atmosphere and ocean system[J].Progress in Natural Science,2004,14(12):1088-1094. |
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| Authors: | GAN Zijun YAN Youfangand Qi Yiquan |
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| Institution: | LED, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China |
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| Abstract: | The energy budget in the system of the earth, atmosphere and ocean conforms to the first law of thermodynamics, namely the law of conservation of energy, and it is balanced when the system is in a steady-state condition. However, the entropy budget following the second law of thermodynamics is unbalanced. In this paper, we deduce the expressions of entropy flux and re-estimate the earth, atmosphere and ocean annual mean entropy budget with the updated climatologically global mean energy budget and the climatologically air-sea flux data. The calculated results show that the earth system obtains a net influx of negative entropy (-1179.3 mWm-2K-1) from its surroundings, and the atmosphere and the ocean systems obtain a net input of negative entropy at about -537.4 mWm-2K-1 and -555.6 mWm-2K-1, respectively. Calculations of the entropy budget can provide some guidance for further understanding the spatial-temporal change of the local entropy flux, and the entropy production resulting from all kinds of irreversible processes inside these systems. |
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| Keywords: | system thermodynamics energy entropy flux |
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