Changes between Version 20 and Version 21 of 2020WP/ASINTER-04_laurent_bulk_ice

Timestamp:

2020-11-19T10:55:38+01:00 (3 years ago)

Author:

laurent

Comment:

--

2020WP/ASINTER-04_laurent_bulk_ice

@@ -30 +30 @@
 == Implementation ==
 
+=== A] New bulk parameterizations to estimate ice-air CD, CH & CE and turbulent fluxes over sea-ice ===
+
+The use now has the possibility to chose between 4 options to to estimate ice-air CD, CH & CE and vertical adjustment of air temperature and humidity over sea-ice:
+
+- constant coefficients, with values explicitly specified in the namelist
+- Andreas et al., 2005
+- Lüpkes et al. 2012
+- Lüpkes & Gryanik, 2015
+
+As such, the following section is added in the ''namsbc_blk'' namelist block:
+{{{#!f
+   !! Bulk transfer coefficients over sea-ice: (relevant IF: nn_ice >=1 )
+   ln_Cx_ice_cst = .true.     ! use constant ice-air bulk transfer coefficients (value given below)
+      rn_Cd_i  = 1.4e-3       ! sea-ice drag coefficient
+      rn_Ce_i  = 1.4e-3       !    "    sublimation coefficient
+      rn_Ch_i  = 1.4e-3       !    "    sensible heat flux coefficient
+   ln_Cx_ice_AN05  = .false.  !  (Andreas et al. 2005)
+   ln_Cx_ice_LU12  = .false.  !  (Lupkes et al. 2012)
+   ln_Cx_ice_LG15  = .false.  !  (Lupkes & Gryanik 2015)
+}}}
 
 
 
-=== Further development of the general SBCBLK interface ===
+...
 
- (introduction of proper bulk parameterizations for ice-air exchanges, new air-sea bulk parameterizations + general improvements and simplifications)
+Note: with respect to the former version of the code, ''Lupkes et al. 2012'' and ''Lupkes & Gryanik 2015'' are now found in their respective module file (gone from {{{sbcblk.F90}}}, and are more thoughtfully adapted, for example the adjustment of air temperature and humidity during the iterative computation of the Cx is now taken into account...
+
+...
+
+
+
+=== B] Improvements of the general SBCBLK interface ===
+
+ (new air-sea bulk parameterization + general improvements and simplifications)
 
 
@@ -46 +74 @@
    * {{{nn_iter_algo}}}, number of iterations to be used in bulk algorithms now provided in "&namsbc_blk" namelist block
 {{{   INTEGER          :: nn_iter_algo   !  Number of iterations in bulk param. algo ("stable ABL + weak wind" requires more)}}}
-   * handling of new namelist parameters for air-ice bulk algorithms ()
-{{{
-   LOGICAL  ::   ln_Cx_ice_cst             ! use constant air-ice bulk transfer coefficients
-   REAL(wp) ::   rn_Cd_i, rn_Ce_i, rn_Ch_i ! constant values for     "       "      "
-   LOGICAL  ::   ln_Cx_ice_LU12            ! air-ice bulk transfer coefficients based on Lupkes et al., 2012)
-   LOGICAL  ::   ln_Cx_ice_LG15            ! air-ice bulk transfer coefficients based on Lupkes & Gryanik, 2015)
-}}}
+   * handling of new namelist parameters for air-ice bulk algorithms (sea section A above...)
    * use of new global public arrays {{{theta_air_zt}}} and {{{q_air_zt}}}, potential air temperature and specific humidity at zt, respectively
      * {{{theta_air_zt}}}, the potential temperature, is computed from absolute temperature at zt (read in netCDF file) and {{{q_air_zt}}} if {{{ln_tair_pot==.false.}}} (new namelist parameter)
@@ -81 +103 @@
 
 
-=== Further development of the STATION_ASF test-case ===
+
+=== C] Further development of the STATION_ASF test-case ===
 
 (boolean sanity-check of the SBCBLK interface and sea-ice support "key_si3")