DOI: 10.1007/s00382-011-0996-2
Scopus记录号: 2-s2.0-84857440377
论文题名: A parametric sensitivity study of entropy production and kinetic energy dissipation using the FAMOUS AOGCM
作者: Pascale S. ; Gregory J.M. ; Ambaum M.H.P. ; Tailleux R.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2012
卷: 38, 期: 2017-05-06 起始页码: 1211
结束页码: 1227
语种: 英语
英文关键词: Entropy sensitivity
; GCM tuning
; Lorenz energy cycle strength
; Maximum entropy production
英文摘要: The possibility of applying either the maximum entropy production conjecture of Paltridge (Q J R Meteorol Soc 101:475-484, 1975) or the conjecture of Lorenz (Generation of available potential energy and the intensity of the general circulation. Pergamon, Tarrytown, 1960) of maximum generation of available potential energy (APE) in FAMOUS, a complex but low-resolution AOGCM, is explored by varying some model parameters to which the simulated climate is highly sensitive, particularly the convective entrainment rate, ε, and cloud droplet-to-rain-conversion rate, cT. The climate response is analysed in terms of its entropy production and the strength of the Lorenz energy cycle. If either conjecture is true, the parameter values which yield the most realistic climate will also maximise the relevant quantity. No maximum is found in the total material entropy production, which is dominated by the hydrological cycle and tends to increase monotonically with global-mean temperature, which is not constant because the parameter variations affect the net input of solar radiation at the top of the atmosphere (TOA). In contrast, there is a non-monotonic, peaked behaviour in the generation of APE and entropy production associated with kinetic energy dissipation, with the standard FAMOUS values for ε and cT occurring nearly at the maximising ones. The maximum states are shown to be states of vigorous baroclinic activity. The peak in the generation of APE appears to be related to a trade-off between the mean vertical stability and horizontal stratification. Experiments are repeated for a simplified setup in which the net solar input at TOA is fixed. Again a peak in the generation of APE is found in association with the maximum baroclinic activity, but no trade-off of the kind shown by simple climate models is found between meridional heat transport and the meridional temperature gradient. We conclude that the maximum entropy production conjecture does not hold within the climate system when the effects of the hydrological cycle and radiative feedbacks are taken into account, but our experiments provide some evidence in support of the conjecture of maximum APE production (or equivalently maximum dissipation of kinetic energy). © 2011 Springer-Verlag. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/55350
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Meteorology, University of Reading, Earley Gate, Reading RG6 6BB, United Kingdom; Met Office Hadley Centre, Exeter EX1 3PB, United Kingdom
Recommended Citation:
Pascale S.,Gregory J.M.,Ambaum M.H.P.,et al. A parametric sensitivity study of entropy production and kinetic energy dissipation using the FAMOUS AOGCM[J]. Climate Dynamics,2012-01-01,38(2017-05-06)