Document Detail


A new one-dimensional radiative equilibrium model for investigating atmospheric radiation entropy flux.
MedLine Citation:
PMID:  20368255     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A new one-dimensional radiative equilibrium model is built to analytically evaluate the vertical profile of the Earth's atmospheric radiation entropy flux under the assumption that atmospheric longwave radiation emission behaves as a greybody and shortwave radiation as a diluted blackbody. Results show that both the atmospheric shortwave and net longwave radiation entropy fluxes increase with altitude, and the latter is about one order in magnitude greater than the former. The vertical profile of the atmospheric net radiation entropy flux follows approximately that of the atmospheric net longwave radiation entropy flux. Sensitivity study further reveals that a 'darker' atmosphere with a larger overall atmospheric longwave optical depth exhibits a smaller net radiation entropy flux at all altitudes, suggesting an intrinsic connection between the atmospheric net radiation entropy flux and the overall atmospheric longwave optical depth. These results indicate that the overall strength of the atmospheric irreversible processes at all altitudes as determined by the corresponding atmospheric net entropy flux is closely related to the amount of greenhouse gases in the atmosphere.
Authors:
Wei Wu; Yangang Liu
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Philosophical transactions of the Royal Society of London. Series B, Biological sciences     Volume:  365     ISSN:  1471-2970     ISO Abbreviation:  Philos. Trans. R. Soc. Lond., B, Biol. Sci.     Publication Date:  2010 May 
Date Detail:
Created Date:  2010-04-06     Completed Date:  2010-07-21     Revised Date:  2011-07-28    
Medline Journal Info:
Nlm Unique ID:  7503623     Medline TA:  Philos Trans R Soc Lond B Biol Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  1367-76     Citation Subset:  IM    
Affiliation:
Brookhaven National Laboratory, Building 815E (75 Rutherford Drive), Upton, NY 11973, USA. wwu@bnl.gov
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MeSH Terms
Descriptor/Qualifier:
Atmosphere*
Climate*
Earth (Planet)*
Entropy*
Greenhouse Effect*
Models, Theoretical*
Radiation
Comments/Corrections

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