Hi 

I was wondering about AMIP-style runs with OpenIFS. About a year ago, Glenn sent me a set of ICMCL files (from prepIFS I think) that I use to give OpenIFS a surface condition when running. These files include skin-temperature, sea ice concentrations, and a bunch of vegetation and soil indices etc. My question is which if all these fields are actually needed.
I know the EC-Earth folks have run AMIP runs where they only give SST and sea-ice defined by some AMIP protocol, but what about all the vegetation, soil and snow variables? Are these kept fixed to some climatology in that case? Or does HTESSEL allow these variables, e.g. snow depth, to evolve over time? 
If I run OpenIFS with only skin temperature and sea ice conc in my ICMCL file, will OpenIFS still produce reasonable results? 

Also, is the skin-temperature over land from the ICMCL really used, or does HTESSEL calculate this by itself so that skin-temp over ocean is the only field I need? 

I'm asking because I'd like to take a few different SST/sea-ice data sets (obs and some future scenarios) and run OpenIFS to see how the atmosphere responds to surface warming/cooling, but I'm not sure which fields I have to present to OpenIFS. 

Best regards
Joakim