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= '''Sea Ice Working Group (SIWG)'''

* ''Leaders'': Ed Blockley (UKMO) & Martin Vancoppenolle (CNRS, Fr)[[BR]] 

* ''Members'': Jeff Ridley​ (UKMO), ​Clément Rousset (CNRS, Fr)​, ​Gurvan Madec​ (CNRS, Fr), Danny Feltham (CPOM, UK), David Schroeder​ (CPOM, UK), Dorotea Iovino (CMCC, It), David Salas y Melia​ (CNRM, Fr), Thierry Fichefet (UCLouvain, Be), François Massonnet (UCLouvain, Be), Gilles Garric (MO, Fr), Yevgeny Aksneov (NOC, UK), Paul Holland (BAS, UK), Steffen Tietsche (ECMWF, UK).

== Objectives

The sea ice working group brings together sea ice modelling NEMO experts.
[[BR]]

The main objective of the SIWG is to look after the representation of sea ice in NEMO, and in particular to lead the development of the SI3 model ('''"Sea Ice modelling Integrated Initiative"''', "sea ice cubed" for short, launched in 2017 , first released in 2019).

This option was seen as an outstanding opportunity to progress, value the available scientific expertise, and better use resources within the NEMO sea ice community.

The transition to a new unified sea ice model involves merging the desired functionalities from each of CICE, GELATO and LIM into a common code within the NEMO framework.

== Current Activities

* finalise the transition from 3 sea ice models (CICE, GELATO and LIM) into SI3;

* develop a long-term strategy, in particular through the writing of the sea ice strategy document chapter (with the help of IS-ENES3 project)

* evaluate SI3 and provide community tools for sea ice evaluation (CMEMS funded SI3 project)

* inter-compare sea ice rheologies at varying resolutions (H2020 IMMERSE project)

* write and review the SI3 documentation

== Recent Meetings

 * [attachment:wiki:WorkingGroups/SI3:NEMO-SIWG_minutes_Jan-Feb_2017_public.pdf Minutes from SIWG meeting] — Jan-Feb 2017, Paris.

 * [attachment:wiki:WorkingGroups/SI3:Minutes_SIWG_Reading_2018.pdf Minutes from SIWG meeting] — Mar 2018, Reading.

* International meeting: ''Defining a cutting-edge future for sea ice modelling — Sep 2019, Laugarvatn, Iceland — [https://is.enes.org/events/workshops/workshop-defining-a-cutting-edge-future-for-sea-ice-modelling201d (link)]
 
== Achievements

* Release of the first version of the SI3 model (Jan 2019).

* International sea ice workshop on sea ice modelling (Sep 2019).

* [attachment:wiki:WorkingGroups/SI3/Blockley_et_al_BAMS2020.pdf (Workshop report) ] in BAMS by Blockley et al. (May 2020).

== Upcoming Meetings

* SIWG annual meeting — tbc July or September 2020




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