From 9986f81bf2b19751eaa9569e1c0c524c4d735dd9 Mon Sep 17 00:00:00 2001
From: Claire Levy <claire.levy@locean.ipsl.fr>
Date: Thu, 27 Jan 2022 15:45:18 +0000
Subject: [PATCH] Update CHANGES.rst for 4.2 release

---
 CHANGES.rst | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 84 insertions(+), 1 deletion(-)

diff --git a/CHANGES.rst b/CHANGES.rst
index 90a08089..f3ae95e5 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -4,4 +4,87 @@ Changes
 
 .. todo::
 
-   List the main additions of the the new release
+   List the main additions of the new 4.2 release - February 2022
+
+   This document lsts the improvements and new features of the 4.2 release compared to the previous 4.0.
+   If you are willing to port an existing configuration in order to start using this new release, it is sugggested to also look at the 4.2 Migration Guide (link to add).
+
+Improvements and new features of 4.2 release
+
+## KERNEL
+
+- Quasi Eulerian Coordinates
+
+- New vertical scale factors management
+
+ - New HPG schemes, Runge Kutta (preparatory stages includes time-pointer changes, DO LOOP macros
+
+ - Full Shallow Water equations setup
+
+## AIR SEA INTERACTIONS
+
+- Currents feedbacks
+
+- Mass-flux convection scheme (still not compatible with TOP & PISCES)
+
+- Bulk improvements 
+
+- ABL1D model & tools improvements
+
+- Wave forcing improvements
+
+- Atmospheric boundary layer
+
+## AGRIF
+
+- Improvement of Agrif for global configurations (periodic, north fold zoom, HPC), AGRIF vertical interpolation
+
+## SI3
+
+- EAP & VP rheology (V&V to complete)
+
+- Melt ponds (preliminary implementation)
+
+## ENHANCE
+
+- Ocean column properties in NEMO-ICB
+
+- OSMOSIS
+
+- Update tidal mixing 
+
+## TOP
+
+- Ice sheet iron sources
+
+- Scheme for vertical penetration of visible light
+
+## DATA interface
+
+- OBS modifications
+
+## IO Manager
+
+- Restart read write with XIOS
+
+## VALIDATION
+
+- Tests cases now available with most  new developments
+
+- SETTE validation script improvements
+
+- OASIS test case for ocean atmosphere coupled interface
+
+## HPC
+
+- Extra Halo extension
+
+- Mixed precision preparatory phase
+
+- MPI Communication cleanup & improvements using MPI3
+
+- Loop fusion
+
+- Tiling
+
+- Improved computational performance of solar penetration scheme
-- 
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