Changes between Version 29 and Version 30 of DevelopmentActivities/CMIP6/DevelopmentsCMIP6/soil_physic

Timestamp:

2015-02-27T14:22:17+01:00 (10 years ago)

Author:

peylin

Comment:

--

DevelopmentActivities/CMIP6/DevelopmentsCMIP6/soil_physic

@@ -302 +302 @@
 == Vertical Soil Discretization ==
 
-- Presentation by Fuxing of his work on the soil W and T discretization: [https://forge.ipsl.jussieu.fr/orchidee/attachment/wiki/Meetings/CMIP6/Physic/20150226_Fuxing.pdf​​][[BR]]
-
-- Discussion
-
-
-- PROPOSED SCHEME
+=== Presentation (Fuxing) ===
+
+Fuxing described his work on the soil W and T discretization: [https://forge.ipsl.jussieu.fr/orchidee/attachment/wiki/Meetings/CMIP6/Physic/20150226_Fuxing.pdf​​][[BR]]
+
+He tested: 
+ - standard discretization : V1
+ - new common scheme with 8m for both W and T: V2
+ - new common scheme with 2m for W and 8m for T: V3
+
+First outcomes for T are:
+5 meters is not enough for diunal/seasonal cycle of T (criterial is that the amplitude of the cycle at lowest layer should lower by a factor "E-3" of that of the first layer ???)
+we need a depth of at least 9.5 m for sand soil when using new USDA texture classes
+
+For soil moisture:
+Differences between V2 and V3 are not too large
+V2 need a longer spin-up (at least 40 yr)
+The impact on the river dischages is significant for some rivers 
+changes in drainage is large but additional graphics are needed to better quantify the changes 
+
+
+=== Discussion ===
+
+With sand and 
+
+
+=== PROPOSED SCHEME ===
 
 The objective is to propose a scheme flexible enough to allow users to test different configurations depending on their objectives and to be able to account for deep soil thermic representation in the case of permafrost.