EAMxx Resolutions, Common Terms `F2010-SCREAMv1`

Current defaults

NE	se_tstep	ATM_NCPL	phys dt (computed, don’t try to change – use ATM_NCPL)	N elements	dtt	dtr	nu_top	hvr	pgc

NE	se_tstep	ATM_NCPL	phys dt (computed, don’t try to change – use ATM_NCPL)	N elements	dtt	dtr	nu_top	hvr	pgc
30	300	48	1800	5400	6	2	250000	6	1
120	75	96	900	86400	6	2	100000	0	0
256	33.33333333333	144	600	393216	6	2	40000	6	1
512	16.6666666666666	432	200	1572864	6	2	20000	0	0
1024	8.3333333333333	864	100	6291456	6	2	10000	6	1

The physics dt (also called dtime) is computed 86400/ATM_NCPL, where ATM_NCPL can be changed with xmlchange. But note while it’s also possible to change dtime, one should not, see user should not be allowed to set dtime in user_nl_cam · Issue #509 · E3SM-Project/E3SM I added the last 2 columns here only because they were oddly different between cases and we’ve found why that’s the case. We don’t depend on ne120/ne512 for production case currently, but we would like to correct this (Mark T is aware).

dtt = dt_tracer_factor
dtr = dt_remap_factor
hvr = hv_ref_profiles
pgc = pgrad_correction
dtt=se_tstep*dtr
phys dt = 86400/ATM_NCPL

dt_tracer_factor = (time step of tracer transport) / (dynamics time step)
dt_remap_factor = (time step of vertical remap) / (dynamics time step)

              se_tstep       ATM_NCPL phys dt    nelem  dtt dtr   nu_top    hvr  pgc
ne30          300                 48    1800        5400   6   2   250000    6     1
ne120          75                 96     900       86400   6   2   100000    0     0
ne256          33.33333333333    144     600      393216   6   2    40000    6     1
ne512          16.6666666666666  432     200     1572864   6   2    20000    0     0
ne1024          8.3333333333333  864     100     6291456   6   2    10000    6     1

actual resolution/compsets used:
ne30pg2_ne30pg2.F2010-SCREAMv1
ne120pg2_ne120pg2.F2010-SCREAMv1
ne256pg2_ne256pg2.F2010-SCREAMv1
ne512pg2_ne512pg2.F2010-SCREAMv1
ne1024pg2_ne1024pg2.F2010-SCREAMv1