Changes between Version 12 and Version 13 of 2020WP/TOP-04_lovato_IMMERSE_BGC_interface

Timestamp:

2021-02-09T17:04:14+01:00 (3 years ago)

Author:

lovato

Comment:

--

2020WP/TOP-04_lovato_IMMERSE_BGC_interface

@@ -68 +68 @@
 == Tests
 {{{ #!box width=50em 
-Here below the development details:
+'''Module development''' 
 - [http://forge.ipsl.jussieu.fr/nemo/browser/NEMO/branches/2020/dev_r12985_TOP-04_IMMERSE_BGC_interface/src/TOP/trcopt.F90 trcopt.F90] module created within src/TOP folder
 - add to {{{namelist_top_ref}}} specific namelist [http://forge.ipsl.jussieu.fr/nemo/browser/NEMO/branches/2020/dev_r12985_TOP-04_IMMERSE_BGC_interface/cfgs/SHARED/namelist_top_ref#L102 nam__trcopt]
 
-The module allows to select the type of light computation to be passed to BGC coupled models by setting the {{{light_loc}}} option to \\
--'center', light in the middle of the water cell \\
--'integral', light integrated over the water cell thickness
 
-In this case SETTE tests won’t provide adequate info as the module needs to be plugged, so testing  was carried out by applying MY_SRC modifications to a new configuration based on ORCA2_ICE_PISCES to evaluate the module outcomes wrt existing code.
+The module allows to \\
+- prescribe PAR conversion factor from external file\\
+- set irradiance to PAR fixed conversion factor {{{parlux}}}\\
+- select the type of light computation to be passed to BGC coupled models by setting the {{{light_loc}}} option to '''center''' (light in the middle of the water cell) and '''integral''' (light integrated over the water cell thickness)
+- provide diagnostics for euphotic layer depth {{{heup}}} and weighted broadband attenuation coefficient {{{xeps}}}.
+
+'''NOTE before merging it is necessary to add xeps to SHARED/field_def_nemo-oce.xml '''
+
+'''Module testing'''
+
+In this case SETTE tests won’t provide adequate info as the module needs to be plugged to be active, so testing  was carried out by applying MY_SRC modifications to a new configuration based on ORCA2_ICE_PISCES to evaluate the module outcomes wrt existing code.
 The following diff show changes to have to be done to plug the module within a BGC model:
 
@@ -117 +124 @@
 }}}
 
+Here attached also the opt_ORCA2_ICE_PISCES.tgz archive with the complete configuration used for the verification (copy it to /cfgs and uncompress).
+'''Note that new fields are defined in the .xmls files contained in tgz archive.'''
+
+By using the default option {{{light_loc = 'center'}}} the difference in total PAR compared to the same PISCES parametrization after 1 year are close to the numerical rounding (~5.e-15). Differences are mainly due to a slightly difference sequence of math operations in the two schemes.
+
+[[Image(etot_1year_surface_center_option.png, width=100%)]]
+
+A comparison between the two options {{{light_loc = 'integral'}}}-{{{light_loc = 'center'}}} indicated that the light integration over the water cell thickness provides, as expected, slightly higher values. Clearly longer comparison will deviate due to the feedback loop between the light and chla from phytoplankton.
+
+[[Image(etot_surface_diff_integral-central.png, width=100%)]]
 
 
 
-Here attached also the opt_ORCA2_ICE_PISCES.tgz archive with the complete configuration used for the verification (copy it to /cfgs and uncompress).
-'''Note that new fields are defined in the .xmls files contained in tgz archive.'''
+}}}
 
-By using the default option {{{light_loc = 'center'}}} the difference in total PAR compared to the same PISCES parametrization after 1 year are close to the numerical rounding (~5.e-15)
 
-[[Image(etot_1year_surface_center_option.png, width=100%)]]
-}}}