Changeset 10456 for NEMO/branches/UKMO/dev_10448_WAD_SBC_BUGFIX/src/OCE/SBC/sbcmod.F90

Timestamp:

2019-01-06T17:17:13+01:00 (4 years ago)

Author:

deazer

Message:

Added option to taper sbc fluxes near very shallow water when using WAD
Corrected some IO bugs in dia25h, diatmb for WAD case.
User has control of the tapering. At what depth to start it, and at what fraction to start
the tanh tapering. At the WAD limit SBC is turned off completely.
Dry cells do not have any communication with the atmosphere
To DO: Documentation update.
Although not all sette tests are passed (AGRIF etc.)
it does no worse than the trunk at the revision the branch is made

File:

• NEMO/branches/UKMO/dev_10448_WAD_SBC_BUGFIX/src/OCE/SBC/sbcmod.F90 (modified) (3 diffs)

NEMO/branches/UKMO/dev_10448_WAD_SBC_BUGFIX/src/OCE/SBC/sbcmod.F90

@@ -58 +58 @@
    USE lib_mpp        ! MPP library
    USE timing         ! Timing
+   USE wet_dry
    USE diurnal_bulk, ONLY:   ln_diurnal_only   ! diurnal SST diagnostic
 
@@ -377 +378 @@
       !
       LOGICAL ::   ll_sas, ll_opa   ! local logical
+      !
+      REAL(wp) ::     zthscl        ! wd  tanh scale
+      REAL(wp), DIMENSION(jpi,jpj) ::  zwdht, zwght  ! wd dep over wd limit, wgt  
+
       !!---------------------------------------------------------------------
       !
@@ -461 +466 @@
 !!$!clem: it looks like it is necessary for the north fold (in certain circumstances). Don't know why.
 !!$      CALL lbc_lnk( 'sbcmod', emp, 'T', 1. )
+   IF ( ll_wd ) THEN     ! If near WAD point limit the flux for now
+    zthscl = atanh(rn_wd_sbcfra)                     ! taper frac default is .999 
+    zwdht(:,:) = sshn(:,:) + ht_0(:,:) - rn_wdmin1   ! do this calc of water
+                                                     ! depth above wd limit once
+    WHERE( zwdht(:,:) <= 0.0 )
+            taum(:,:) = 0.0
+            utau(:,:) = 0.0
+            vtau(:,:) = 0.0
+            qns (:,:) = 0.0
+            qsr (:,:) = 0.0
+            emp (:,:) = min(emp(:,:),0.0) !can allow puddles to grow but not shrink
+            sfx (:,:) = 0.0
+    END WHERE
+    zwght(:,:) = tanh(zthscl*zwdht(:,:))
+    WHERE( zwdht(:,:) > 0.0  .and. zwdht(:,:) < rn_wd_sbcdep ) !  5 m hard limit here is arbitrary
+            qsr  (:,:) =  qsr(:,:)  * zwght(:,:)
+            qns  (:,:) =  qns(:,:)  * zwght(:,:)
+            taum (:,:) =  taum(:,:) * zwght(:,:)
+            utau (:,:) =  utau(:,:) * zwght(:,:)
+            vtau (:,:) =  vtau(:,:) * zwght(:,:)
+            sfx (:,:)  =  sfx(:,:)  * zwght(:,:)
+            emp  (:,:) =  emp(:,:)  * zwght(:,:)
+    END WHERE
+   ENDIF
       !
       IF( kt == nit000 ) THEN                          !   set the forcing field at nit000 - 1    !