Winter Solstice aquaplanet

[mark@atmos_colostate_edu]

I was trying to set up a perpetual winter solstice aquaplanet simuation with CESM2.2.2, but no matter what I do I keep getting summer equinox conditions. I put a copy of seq_infodata_mod.F90 in my case directory’s SourceMods/src.drv and made this change:

!integer(SHR_KIND_IN),parameter :: aqua_perpetual_ymd = 321
integer(SHR_KIND_IN),parameter :: aqua_perpetual_ymd = 1221

And then I’ve got these settings in user_nl_cpl:

orb_eccen = 0.
orb_obliq = 23.44
orb_mvelp = 0.
orb_mode = "fixed_parameters"

Apparently I’m doing something wrong. Any ideas?

Thanks,
Mark Branson