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

Timestamp:

2012-05-31T15:52:09+02:00 (12 years ago)

Author:

acc

Comment:

--

ticket/0665_mass_heat_salt_fluxes

@@ -4 +4 @@
 [[BR]]
 
-'''Author''' : Gurvan Madec, Yevgeny Aksenov, Matthieu Leclair 
+'''Author''' : Andrew Coward (2012); Gurvan Madec, Yevgeny Aksenov, Matthieu Leclair (2010-11)
 
 '''ticket''' : #665
 
-'''Branch''' : [https://forge.ipsl.jussieu.fr/nemo/browser/branches/DEV_r1837_mass_heat_salt_fluxes  DEV_r1837_mass_heat_salt_fluxes ] 
+'''Current Branch''' : [https://forge.ipsl.jussieu.fr/nemo/browser/branches/2012/dev_r3385_NOCS_HAMF]
+
+=== Description ===
+
+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. There are several aspects to this work:[[BR]]
+
+1. 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]]
+
+2. 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]]
+
+
+
+{{{
+dT = .... qns/(rau0*Cp*e3t) + emp*Tn/(e3t*rau0)
+
+dS = .... sfx/(rau0*e3t)        + emp*Sn/(rau0*e3t)
+}}}
+
+where 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:
+
+{{{
+dT = .... qns/(rau0*Cp*e3t) 
+dS = .... sfx/(rau0*e3t)        
+}}}
+
+3. To introduce namelist options to select options for embedding the sea-ice:
+
+
+{{{
+0 Traditional levitating sea-ice (no mass exchange)
+1 Levitating sea-ice with mass exchange but no pressure effect
+2 Fully embedded sea-ice (mass exchange + pressure exerted on the ocean)
+}}}
+
+
+
+=== Work in previous years ====
+
+'''Old Branch''' : [https://forge.ipsl.jussieu.fr/nemo/browser/branches/DEV_r1837_mass_heat_salt_fluxes  DEV_r1837_mass_heat_salt_fluxes ] 
 ----
 
@@ -22 +60 @@
 ----
 
-=== Description ===
-
-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.
 
 This update is the NOCS.4 task (Revisit of mass and salt fluxes) due by 2nd July 2010