Changes between Version 14 and Version 15 of 2020WP/TOP-01_rlod_Antarctic_ice_Sheet_Fe_Source

Timestamp:

2020-10-14T17:13:28+02:00 (4 years ago)

Author:

rlod

Comment:

--

2020WP/TOP-01_rlod_Antarctic_ice_Sheet_Fe_Source

@@ -28 +28 @@
 === Implementation
 
-{{{#!box width=35em help
-Describe flow chart of the changes in the code. \\
-List the Fortran modules and subroutines to be created/edited/deleted. \\
-Detailed list of new variables to be defined (including namelists), \\
-give for each the chosen name and description wrt coding rules.
-}}}
+Representation of the external source of biogeochemical tracers from iceberg and ice shelf.
+For instance, for dissoved Fe, a sediment content associated to a solubility fraction of sediment Fe is added to the freshwater fluxes of iceberg and ice shelf. For iceberg, a homogeneous distribution of the biogeochemical tracers until 120 m of depth is applied. For ice shelf, the biogeochemical tracer content is distributed homogeneously following the representation of the isf freshwater flux of Mathiot et al. (2017) whether the under ice shelf cavities are open or not. 
 
-External sources of biogeochemical tracers from iceberg and ice shelf.
-For instance, for dissoved Fe, a sediment content associated to a solubility fraction of sediment Fe is added to the freshwater fluxes of iceberg and ice shelf. For ice shelf, the parameterization of Mathiot et al. (2017) is used for the distribution of Fe throughout the water column. For iceberg, a homogeneous distribution until 120 m of depth is applied.
-
-File dependency: feshwater fluxes from ice shelf and iceberg from observations and model climatology:
+File dependency: feshwater fluxes from ice shelf and iceberg:
 - runoff-icb_DaiTrenberth_Depoorter_eORCA1_JD.nc
 - runoff-icb_DaiTrenberth_Depoorter_eORCA025_JD.nc
 
-This file dependency didn’t exist for ORCA2 grid. I have build one but roughly interpolated. Another issue with the ORCA2 configuration is that the grid is not extended in the Antarctic. There is no representation of ice shelf cavities which are needed to model the distribution of freshwater flux under ice shelves with the parameterization of Mathiot et al. (2017) used in the present development.
+This file dependency didn’t exist for ORCA2 configuration as the grid is not extended in Antarctica. Thus, there is no representation of ice shelf cavities which are needed to model the distribution of freshwater flux under ice shelves with the parameterizations of Mathiot et al. (2017). Thus, this module can not be activated in ORCA2, the external source of BGC tracers from the Antarctic Ice Sheet is consequently disabled in this configuration.
 
-Consequently, this external of source Fe will be disabled in the ORCA2 configuration.
+- Activation in TOP:
 
-- Activation in TOP: namelist_top
-Creation of the trc_ais routine controllable in the TOP module and allowing to adjust the concentration of Fe and other biogeochemical tracers in icebergs and ice shelves through a loop over all the biogeochemical tracers. This AIS tracers source can be activated with a boolean in the namelist_top:
+Creation of the trcais routine controllable in TOP module, which allows to adjust the concentration of Fe, for now, and of other biogeochemical tracers (potentially later) associated with iceberg and ice shelf freshwater fluxes through a loop over all the biogeochemical tracers. The AIS tracers source can be activated with a boolean in the namelist_top:
 
 ln_trcais     =  .false. !  Antarctic Ice Sheet nutrient supply
 
 !-----------------------------------------------------------------------
+
 &namtrc_ais      !  Representation of Antarctic Ice Sheet tracers supply
+
 !-----------------------------------------------------------------------
    rn_trafac(14) =  4.476e-07   !  (  0.5e-3 / 55.85 * 0.05 )
 !
    nn_ais_tr     =  1      !  tracer concentration in iceberg and ice shelf
-                           !    = 0 (null concentrations)
-                           !    = 1 prescribed concentrations
+
+- 0 is for null concentrations
+- 1 for prescribed concentrations
+
    rn_icbdep     =  120.   ! Mean underwater depth of iceberg (m)
 
-Warning: the isf source has to be activated in the namelist_cfg: parameter
-    ln_isf = .true.
- then chose one of the two options for isf melt:
+Warning: the isf source has to be activated in the namelist_cfg:
+ ln_isf = .true.
+then chose one of the two options for isf melt:
 
  ln_isfcav_mlt = .false. or ln_isfpar_mlt = .true.
@@ -69 +65 @@
 and activate runoff from icebergs
 
-   ln_rnf_icb  = .true.    ! freshwater flux from icebergs
+ ln_rnf_icb  = .true.    ! freshwater flux from icebergs
 
+created routine:
+- trcais.F90
+
+List of modified routines:
+
+- nemogcm.F90
+- sbcrnf.F90
+- trc.F90
+- trcini.F90
+- trcnam.F90
+- trctrp.F90
 
 === Documentation updates