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  Maximum entropy production, cloud feedback, and climate change

Paltridge, G. W., Farquhar, G. D., & Cuntz, M. (2007). Maximum entropy production, cloud feedback, and climate change. Geophysical Research Letters, 34(14), L14708. doi:10.1029/2007gl029925.

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BGC1070.pdf (Publisher version), 173KB
 
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http://dx.doi.org/10.1029/2007gl029925 (Publisher version)
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 Creators:
Paltridge, G. W., Author
Farquhar, G. D., Author
Cuntz, M.1, Author           
Affiliations:
1Department Biogeochemical Systems, Prof. M. Heimann, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497755              

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Free keywords: FLUCTUATION THEOREM; MODELS
 Abstract: A steady-state energy-balance climate model based on a global constraint of maximum entropy production is used to examine cloud feedback and the response of surface temperature T to doubled atmospheric CO2. The constraint ensures that change in zonal cloud amount theta necessarily involves change in the convergence KX of meridional energy flow. Without other feedbacks, the changes in q, KX and T range from about 2%, 2 Wm(-2) and 1.5 K respectively at the equator to -2%, -2 Wm(-2) and 0.5 K at the poles. Global-average cloud effectively remains unchanged with increasing CO2 and has little effect on global-average temperature. Global-average cloud decreases with increasing water vapour and amplifies the positive feedback of water vapour and lapse rate. The net result is less cloud at all latitudes and a rise in T of the order of 3 K at the equator and 1 K at the poles. Ice-albedo and solar absorption feedbacks are not considered.

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Language(s): eng - English
 Dates: 2007
 Publication Status: Issued
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1029/2007gl029925
ISI: ://000248420000001
Other: BGC1070
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Title: Geophysical Research Letters
  Abbreviation : GRL
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Geophysical Union
Pages: - Volume / Issue: 34 (14) Sequence Number: - Start / End Page: L14708 Identifier: ISSN: 0094-8276
CoNE: https://pure.mpg.de/cone/journals/resource/954925465217