Changes between Version 27 and Version 28 of ticket/0665_mass_heat_salt_fluxes


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Timestamp:
2012-05-31T15:52:09+02:00 (9 years ago)
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acc
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  • ticket/0665_mass_heat_salt_fluxes

    v27 v28  
    44[[BR]] 
    55 
    6 '''Author''' : Gurvan Madec, Yevgeny Aksenov, Matthieu Leclair  
     6'''Author''' : Andrew Coward (2012); Gurvan Madec, Yevgeny Aksenov, Matthieu Leclair (2010-11) 
    77 
    88'''ticket''' : #665 
    99 
    10 '''Branch''' : [https://forge.ipsl.jussieu.fr/nemo/browser/branches/DEV_r1837_mass_heat_salt_fluxes  DEV_r1837_mass_heat_salt_fluxes ]  
     10'''Current Branch''' : [https://forge.ipsl.jussieu.fr/nemo/browser/branches/2012/dev_r3385_NOCS_HAMF] 
     11 
     12=== Description === 
     13 
     14Revisit the formulation of the fluxes between ocean, ice and atmosphere : an exchange of water (mass exchange) is now explicitly associated with an exchange of heat and salt content. This modification simplifies the implementation of a fully embedded sea-ice. There are several aspects to this work:[[BR]] 
     15 
     161. To improve the conservation of heat and mass due to surface fluxes by, for example, correcting accounting for the heat content of liquid and solid precipitation.[[BR]] 
     17 
     182. To introduce a more symmetric treatment of  the surface trend of temperature and salinity by suppressing the emps (virtual flux due to concentration/dilution effects of freezing and melting) in favour of a salt flux array (sfx) such that, for the linear free surface, in all cases (levitating vs embedded sea-ice; surface restoring vs free running) the surface trend is expressed as:[[BR]] 
     19 
     20 
     21 
     22{{{ 
     23dT = .... qns/(rau0*Cp*e3t) + emp*Tn/(e3t*rau0) 
     24 
     25dS = .... sfx/(rau0*e3t)        + emp*Sn/(rau0*e3t) 
     26}}} 
     27 
     28where sfx contains only the salt flux due to freezing and melting. In the non-linear free surface case there is no concentration/dilution effect because mass is explicitly exchanged so the trends become: 
     29 
     30{{{ 
     31dT = .... qns/(rau0*Cp*e3t)  
     32dS = .... sfx/(rau0*e3t)         
     33}}} 
     34 
     353. To introduce namelist options to select options for embedding the sea-ice: 
     36 
     37 
     38{{{ 
     390 Traditional levitating sea-ice (no mass exchange) 
     401 Levitating sea-ice with mass exchange but no pressure effect 
     412 Fully embedded sea-ice (mass exchange + pressure exerted on the ocean) 
     42}}} 
     43 
     44 
     45 
     46=== Work in previous years ==== 
     47 
     48'''Old Branch''' : [https://forge.ipsl.jussieu.fr/nemo/browser/branches/DEV_r1837_mass_heat_salt_fluxes  DEV_r1837_mass_heat_salt_fluxes ]  
    1149---- 
    1250 
     
    2260---- 
    2361 
    24 === Description === 
    25  
    26 Revisit the formulation of the fluxes between ocean, ice and atmosphere : an exchange of water (mass exchange) is now explicitly associated with an exchange of heat and salt content. This modification simplifies the implementation of a fully embedded sea-ice. 
    2762 
    2863This update is the NOCS.4 task (Revisit of mass and salt fluxes) due by 2nd July 2010