ticket: [https://forge.ipsl.jussieu.fr/nemo/ticket/1426 1426][[BR]]

development code: https://forge.ipsl.jussieu.fr/nemo/browser/branches/2015/dev_r5003_MERCATOR6_CRS [[BR]]


= 1.How activting coarsening ? =
see [https://forge.ipsl.jussieu.fr/nemo/browser/branches/2015/dev_r5003_MERCATOR6_CRS/NEMOGCM/CRS_help/README_COARSENING.txt readme file]

= 2. Building input files =

== 2.1 TOP   input files: passive tracers initial conditions ==
interpolated on 1 degree regular grid; 
source: ???? Coralie ? 

use interpolation-on-the-fly: weight files computed for 1°-Regular grid to eORCA025 and eORCA075.
need to put them on shaconemo ( CBR )



== 2.2 PISCES input files: ==

=== 2.2.1 build river files for PISCES when using coarsening ===

1. output ocean dynamic runoff in a netcdf file at 0.25° resolution with XIOS and coarsene it 'offline' with [https://forge.ipsl.jussieu.fr/nemo/attachment/wiki/2017WP/ROBUST-03_Clement_CRS/DOC/DEGRAD_OFF.tar offline coarsening tools][[BR]]

   or[[BR]]
   output ocean dynamic runoff in a netcdf file at 0.75° resolution with XIO when coarsening is activated[[BR]]

2. collocalize 'BCG' runoff on this file at 0.75° resolution.[[BR]]


=== 2.2.2 bathyfer et hydrofer ===

1. create bathyfer at 0.25° resolution[[BR]]

2. coarsene it 'offline' with [https://forge.ipsl.jussieu.fr/nemo/attachment/wiki/2017WP/ROBUST-03_Clement_CRS/DOC/DEGRAD_OFF.tar offline coarsening tools] [[BR]]


=== 2.2.3 other===
ndeposition, dust and solubility: need to be interpolated on model grid ( interpolation-on-the-fly not available )
need to put them on shaconemo ( CBR )