Improvements of release 3_6_stable of NEMO

Updates of NEMO 3_6_stable

As announced in July 2015, the 3_6_STABLE release of NEMO includes

    • The main branch:  https://forge.ipsl.jussieu.fr/nemo/browser/branches/2015/nemo_v3_6_STABLE/NEMOGCM
    • The associated branch for on-line coarsening of biogeochemistry: https://forge.ipsl.jussieu.fr/nemo/browser/branches/2015/dev_r5003_MERCATOR6_CRS/NEMOGCM  (needs to be merged locally with 3_6_STABLE)
    • The updated reference manual: http://www.nemo-ocean.eu/About-NEMO/Reference-manuals

Since last July, some improvements and fixes have been done.
Please find below the summary of changes:

- Update of reference manual (to be found on the web page)
- XIOS2 : allows using the up to date release of XIOS #819 (only if key_xios2 added in list of NEMO cpp keys). Some associated changes in xml file, fo which templates are available in CONFIG/GYRE_XIOS/EXP00/*.xml
- New version of AGRIF
- Updates in dynamics:
        • New internal wave driven mixing parameterization available with key_zdftmx_new (see ticket #1674)
        • Update of traqsr.F90 in RGB case when using surface Chlorophyll data : a vertical profile is computed if nn_chldta=2

- Updates in sea ice (LIM3):
        • Add a new ice albedo scheme in LIM, managed by nn_ice_alb = 1 (see ticket #1654)
        • Send a non-zero fresh water budget for the passive tracers (impact on iron uptake/release by the ice)  (see ticket  #1694)
        • Add the computation of the snow blown into the ocean for coupled model (impact on global mass conservation)  (see ticket #1696)
        • Add sublimation over sea-ice and snow (see ticket #1697)
        • removed Langmuir cell parameterization below sea ice (see ticket #1604)


        • improvement of ventilation in southern ocean : have 2 different values for open lead fraction (in namelist : rn_amax_n and rn_amax_s) in Arctic and Antarctic, as proposed by Olivier Aumont, see changeset:6311

- Updates in biogeochemistry :
        • Better representation of OMZ : have the possibility to increase zonal equatorial diffusion for passive tracers, see changeset:6312

List of bugfixes done since July 2015 can be found here.

It is suggested to update your version onto the HEAD of 3_6_STABLE in order to benefit from these improvements.