Changeset 3807 for branches/2012

Timestamp:

2013-02-13T07:29:43+01:00 (11 years ago)

Author:

gm

Message:

dev_v3_4_STABLE_2012: #997 and #898: in LIM3, no use of qla_ice in coupled mode and its capping in forced mode

Location:

branches/2012/dev_v3_4_STABLE_2012/NEMOGCM/NEMO/LIM_SRC_3

Files:

• limthd_dh.F90 (modified) (2 diffs)
• limthd_dif.F90 (modified) (2 diffs)

branches/2012/dev_v3_4_STABLE_2012/NEMOGCM/NEMO/LIM_SRC_3/limthd_dh.F90

@@ -38 +38 @@
 
    !!----------------------------------------------------------------------
-   !! NEMO/LIM3 4.0 , UCL - NEMO Consortium (2010)
+   !! NEMO/LIM3 3.4 , UCL - NEMO Consortium (2010)
    !! $Id$
    !! Software governed by the CeCILL licence     (NEMOGCM/NEMO_CeCILL.txt)
@@ -317 +317 @@
 
       DO ji = kideb, kiut
-         ! if qla is positive (upwards), heat goes to the atmosphere, therefore
-         ! snow sublimates, if qla is negative (downwards), snow condensates
+         ! qla_ice is always >=0 (upwards), heat goes to the atmosphere, therefore snow sublimates
+#if defined key_coupled
+         zdh_s_sub(ji)    =  0._wp      ! coupled mode: sublimation already included in emp_ice (to do in limsbc_ice)
+#else
+         !                              ! forced  mode: snow thickness change due to sublimation
          zdh_s_sub(ji)    =  - parsub * qla_ice_1d(ji) / ( rhosn * lsub ) * rdt_ice
+#endif
          dh_s_tot (ji)    =  dh_s_tot(ji) + zdh_s_sub(ji)
          zdhcf            =  ht_s_b(ji) + zdh_s_sub(ji) 

branches/2012/dev_v3_4_STABLE_2012/NEMOGCM/NEMO/LIM_SRC_3/limthd_dif.F90

@@ -34 +34 @@
 
    !!----------------------------------------------------------------------
-   !! NEMO/LIM3 4.0 , UCL - NEMO Consortium (2011)
+   !! NEMO/LIM3 3.4 , UCL - NEMO Consortium (2011)
    !! $Id$
    !! Software governed by the CeCILL licence     (NEMOGCM/NEMO_CeCILL.txt)
@@ -717 +717 @@
       !   11) Fluxes at the interfaces                                          !
       !-------------------------------------------------------------------------!
+         ! duplicate the loop for performances issues
       DO ji = kideb, kiut
-         !                                ! update of latent heat fluxes
-         qla_ice_1d (ji) = qla_ice_1d (ji) + dqla_ice_1d(ji) * ( t_su_b(ji) - ztsuold(ji) )
+#if ! defined key_coupled
+         ! forced mode only : update of latent heat fluxes (sublimation) (always >=0, upward flux) 
+         qla_ice_1d (ji) = MAX( 0._wp, qla_ice_1d (ji) + dqla_ice_1d(ji) * ( t_su_b(ji) - ztsuold(ji) ) )
+#endif
          !                                ! surface ice conduction flux
          isnow(ji)       = INT(  1._wp - MAX( 0._wp, SIGN( 1._wp, -ht_s_b(ji) ) )  )