Changes between Version 35 and Version 36 of DevelopmentActivities/CMIP6/DevelopmentsCMIP6/soil_physic

Timestamp:

2015-02-27T16:37:39+01:00 (9 years ago)

Author:

peylin

Comment:

--

DevelopmentActivities/CMIP6/DevelopmentsCMIP6/soil_physic

@@ -412 +412 @@
 However, we agreed that with very thin snow layers this could be a problem (see "trick" of Tao in coupled mode). 
 
-We thus proposed that a first improvement could be to account for fractional snow cover for the energy budget (not only for the albedo). For that the equavalent "C" term passed to "Enerbil" should be a mix between the one from standard "Thermosoil" 
+We  proposed that a first improvement is to account for fractional snow cover for the energy budget (not only for the albedo). For that the equavalent "C" term passed to "Enerbil" should be a mix between the standard one of "Thermosoil" and the one from "ES". But this needs some revision of the equation and calls of the routine (to be writen explicitely first).
+
+JP propose that we also split the fluxes from Thermosoil back to enerbil and ES with different values.. this would ensure also a full implicit scheme. 
+
 
 == PROPOSED ACTIONS ==
 
- - Vertical discretization
-  - Fuxing will corrects is new scheme for heat capacity (C=f(wi)) and thermal conductivity ("landa" f(theta_i, theta_i+1))
+ - Vertical discretization:
+  - Fuxing will correct the new scheme for heat capacity (C=f(wi)) and thermal conductivity ("landa" f(theta_i, theta_i+1))
   - Fuxing will provide additional diagnostic for the soil water balance (runoff, drainage, ...) to check the differences between 8m and 2m W depth; BUT for that Fuxing needs a better forcing than the current one (ongoing action for the whole ORC group)
-  - Jan propose a little python code that can create all possible discretization for us to check
-  - we all review/agree/comment for a little time on the new proposed discretization
-  - FOR CMIP6: we propose to start with version V3 of Fuxing unless new tests show that V2 is better
+  - Jan will propose a little python code that can create all possible discretization for us to check
+  - we all review/agree/comment (for a restricted time period) on the new proposed discretization
+  - FOR CMIP6: we propose to start with version V3 of Fuxing unless new tests show that V2 is better; we propose to use new USDA soil texture classes
   - Remark on the W depth: in CMIP5 the depth of choisnel was increase to avoid Amazon drying; this should not be the case with the 2m CWRR as there are much more water holding capacity than with Choisnel. BUT we keep in mind the possibility to increase Depth_Wmax
- - Snow Scheme
-  - Josefine with Tao implement the updated version of ES (currently in MICT) into TRUNC
-  - we further add a fractional snow cover so that the problem of "very thin" snow layer (linked to the non fully implicit scheme) becomes most likely negligeable. JLD propose that Fuxing helps in this implementation
-  - Few needs to gather to establish properly the equation-changes that are needed for a full implicit implementation between "enerbyl" "ES" and "Thermosoil": the list of the "few" needs to be decided...  
-
+ - Snow Scheme:
+  - Josefine with Tao will implement the updated version of ES (currently in MICT) into TRUNC
+  - we further add a fractional snow cover so that the problem of "very thin" snow layer (linked to the non fully implicit scheme) becomes most likely negligeable. JLD propose that Fuxing helps with this implementation.
+  - Few persons needs to gather to establish properly the equation-changes that are needed for a full implicit implementation between "enerbyl" "ES" and "Thermosoil": the list of the "few" needs to be decided ? (volunter ?)
+ - Soil freezing
+  - We start for CMIP6 with the current scheme of Isabelle G.
+  - GK/PP will ask IG if she wants to further work on improving the scheme (given that she is working a bit with ORC); but other person to work on it are welcome!
+  
+