DOI: 10.1002/2014MS000404
Scopus记录号: 2-s2.0-85027949416
论文题名: Exploring the concept of maximum entropy production for the local atmosphere-glacier system
作者: Mölg T
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2015
卷: 7, 期: 2 起始页码: 412
结束页码: 422
语种: 英语
英文关键词: Budget control
; Geophysics
; Thermodynamics
; Internal efficiencies
; Maximum entropy productions
; Multi-parameter optimizations
; Nonequilibrium system
; Planetary atmosphere
; Second Law of Thermodynamics
; Short-wave radiation
; Tropical atmospheres
; Entropy
; coupling
; energy dissipation
; energy flow
; glacier
; latitude
; mass balance
; maximum entropy analysis
; numerical model
; optimization
; shortwave radiation
; thermodynamics
英文摘要: The concept of maximum entropy production (MEP) is closely linked to the second law of thermodynamics, which explains spontaneous processes in the universe. In geophysics, studies have argued that planetary atmospheres and various subsystems of Earth also operate at maximum dissipation through MEP. One of the debates, however, has concerned the degree of empirical support. This article extends the topic by considering measurements from a high-altitude, cold glacier in the tropical atmosphere and a numerical model, which represents the open and nonequilibrium system of glacier-air exchanges. Results reveal that several sensitive system parameters, which are mainly tied to the shortwave radiation budget, cause MEP states at values that coincide closely with the in situ observations. Parameters that set up the forcing of the whole system, however, do not show this pattern. Empirical support for the detection of MEP states, therefore, is limited to parameters that regulate the internal efficiency of energy flow in the glacier. System constraints are shown to affect the solutions, yet not critically in the case of the two most sensitive parameters. In terms of MEP and geophysical fluids, the results suggest that the local atmosphere-glacier system might be of relevance in the further discussion. For practical purposes, the results hold promise for using MEP in single or multiparameter optimization for process-based mass balance models of glaciers. Key Points: Entropy production is calculated with a glacier-atmosphere model In situ measurements support a state of maximum entropy production This state is most important for internal system parameters © 2015. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/76046
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Climate System Research Group, Institute of Geography, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Erlangen, Germany
Recommended Citation:
Mölg T. Exploring the concept of maximum entropy production for the local atmosphere-glacier system[J]. Journal of Advances in Modeling Earth Systems,2015-01-01,7(2)