= Announcement of NEMO 3.6 release

Original publication (eZ): '''2015-06-30 15:28 CEST''' by '''clevy'''\\
Last edition: '''[[Wikinfo(changed_ts)]]''' by '''[[Wikinfo(changed_by)]]'''
                
== NEMO v3_6_STABLE release

Up to now, the stable NEMO release was [source:/branches/2012/dev_v3_4_STABLE_2012/ 3.4]. '''From now on a [source:/branches/2015/nemo_v3_6_STABLE 3.6 release] is available.'''

This release will be used by all CMIP6 experiments using NEMO (CERFACS, CMCC, EC_EARTH, Hadley Centre, IPSL).\\
It includes all developments from 3_4_STABLE, i.e. 3_5, 3_6_beta, including the new XIOS IO system and some new features.

For all users, it is strongly suggested to move to this new stable release of NEMO:
* If you are using 3_4_STABLE now, because this release will now become gradually obsolete
* If you are using the NEMO trunk (3_5, 3_6...) because 3_6_STABLE is now the up to date version which will be supported, whereas the trunk will be used from now on for future developments and major (and probably unstable) simplifications.

=== Quick start guide

is available [wiki:Users/ModelInstall here].\\
'''Please note that XIOS 1.0 is mandatory.'''
{{{#!comment
Remove from original
'This page also describes simple way to update an existing application (see Update section).\\'
}}}

=== Main new features

For details, see ReleaseNotes
|| Coupled interface for next IPCC requirements (multi category sea-ice, calving and iceberg module) || Runoff improved and SBC with BGC || Solar flux filtering at daily frequency to force BGC component ||
|| Major evolution of LIM sea-ice model (including LIM3 in mono category, i.e. similar to LIM2) || On line coarsening of ocean I/O || Ocean and ice allowed to be explicitly coupled through OASIS, using Stand Alone Surface module) ||
|| First steps of wave coupling || MPI optimisation || XIOS new IO system ||
|| Standard Fox Kemper parametrisation || Atmospheric forcing at land-ocean interface || Open boundaries: completion of BDY/OBC merge ||
|| Solved 2 time stepping issues || Faster split-explicit time stepping, Z-tilde ALE coordinates, implicit bottom friction || First version of Configuration Manager || 
|| Standalone OBS component and improvements in OBS & ASM ||

=== Features becoming obsolete

LIM2 (replaced by LIM3 monocategory)

=== Validation

3.6 release has been validated as usual: so-called SETTE tests (restartability and reproducibility on each of the [wiki:Users/ReferenceConfigurations reference configurations] and appropriate validations of all new developments.\\
Details on validation can be found [wiki:Users/Validation/nemo_v3_6 here]

=== Associated branches

A few associated development branches will remain aside, at least until full validation. Those development branches listed below will be kept up to date with 3.6 stable.\\
A project needing one or more of these branches will have to:
1. [wiki:Users/ModelInstall Extract 3.6 release as usual]
2. Locally merge the needed development branch with 3_6_STABLE
{{{#!sh
svn merge http://forge.ipsl.jussieu.fr/nemo/svn/branches/'name_of_the_branch'
}}}

==== List of associated branches

* [source:/branches/2015/dev_r5003_MERCATOR6_CRS/NEMOGCM On line coarsening of biogeochemistry]