I was approached by a colleague of mine who was asking about the feasibility of calculating chemical tracer transport with OpenIFS. I did some research and found three different project in this direction.

Firstly there is IFS-CTM, an old project by Flemming et. al to coupled IFS with three different chemical tracer models, MOZART3, TM5 and MOCAGE: https://www.geosci-model-dev.net/2/253/2009/gmd-2-253-2009.pdf

then I found C-IFS also by Flemming et. al which is said to superseed IFS-CTM https://www.geosci-model-dev.net/8/975/2015/

and lastly TM5 coupling in EC-Earth by Twan van Noije: https://www.geosci-model-dev.net/7/2435/2014/

My question thus is, coming from standalone OpenIFS, which is the most easily realized implementation of aerosol tracers? Does Cy40 contain C-IFS? If not, will Cy43 do so? I found traces of IFS-CTM, is it still functional? 

If all of the above questions would have no as an answer, then I take it I would recommend the EC-Earth TM5 route to him.

Best regards,

Jan