Changes between Version 50 and Version 51 of DevelopmentActivities/CMIP6/DevelopmentsCMIP6/soil_physic

Timestamp:

2015-09-01T18:36:54+02:00 (9 years ago)

Author:

fwang

Comment:

--

DevelopmentActivities/CMIP6/DevelopmentsCMIP6/soil_physic

@@ -568 +568 @@
  It has been corrected. Now the unit of SWE is the same with that of ORCHIDEE standard output (Kg/m²). [[BR]]
 
+== Testing roughness length for heat in LMDZOR ==
+
+01-Sep-2015 by Fuxing WANG, Frederique CHERUY. [[BR]]
+
+Background:
+    The roughness length for heat (z0h) is generally not identical to roughness length for momentum (z0m). [[BR]]
+    In LMDZOR, z0h = z0m. A short description of related code is (only in coupled mode): https://forge.ipsl.jussieu.fr/orchidee/attachment/wiki/Meetings/CMIP6/Physic/condveg_z0cdrag.pdf [[BR]]
+Objective:
+    To test the sensitively of LMDZOR to z0h.[[BR]]
+Simulations:
+    Two simulations (1-year) were done with LMDZOR after 20 years spin-up.[[BR]]
+    (1) CTL: z0h = z0m; ORCHIDEE-rev 2664, LMDZ-rev 2287; new soil vertical discretization and soil thermodynamics [[BR]]
+    (2) EXP: The same as CTL, but z0h = 0.1 * z0m. [[BR]]
+Results: 
+    Results are compared over different seasons (annual mean, JJA and DJF): https://forge.ipsl.jussieu.fr/orchidee/attachment/wiki/Meetings/CMIP6/Physic/z0mh_annual_jja_djf.pdf. [[BR]]
+    The left side in the figures is "CTL: z0h = z0m", the right side is the 'EXP-CTL' (except the last row which is the " EXP/CTL"). [[BR]]
+    The Ts (temp_sol) increases over most regions. The maximum increase is over 0N-90N in JJA (1-2K), while it is over 30N-60S in DJF (0.5-1.5K).(Fig b) [[BR]]
+    The pattern of fluxsens is similar for different seasons. It increases over most regions (3 W/m2 for most regions).[[BR]]
+    The variation of fluxlat (+/- 6 W/m2 over most regions) and precipitation (+/-0.5mm/d over most regions) is less systematic than Ts and fluxsens. [[BR]]