[MITgcm-devel] ad-monitor and adjDumpFreq

[Jean-Michel Campin]

Hi Patrick,

I found a curious behaviour in global_ocean.cs32x15/input_ad.thsice
when changing adjDumpFreq (was set to the time-step, i.e., 86400., 
and it is now set to 5.days = 5 iters):
The AD gradient change a little (15 digits of matching) but the ad-monitor
show much larger changes (monitorFreq and adjMonitorFreq are identical
and unchanged). 

For instance, with adjDumpFreq=1.day:
 %MON ad_time_tsnumber             =                 72009
 %MON ad_dynstat_aduvel_max        =   2.2450171119584E+01
 %MON ad_dynstat_aduvel_min        =  -3.3833812610162E+01
 %MON ad_dynstat_aduvel_mean       =   1.6255799062282E-02
 %MON ad_dynstat_aduvel_sd         =   1.1963888239412E+00
 %MON ad_dynstat_aduvel_del2       =   1.1141126706330E-02
 %MON ad_dynstat_advvel_max        =   2.0745134286660E+01
 %MON ad_dynstat_advvel_min        =  -1.6119016591924E+01
 %MON ad_dynstat_advvel_mean       =  -4.7604298682127E-02
 %MON ad_dynstat_advvel_sd         =   1.1114721035496E+00
 %MON ad_dynstat_advvel_del2       =   9.3959189450550E-03

and with adjDumpFreq=5.days:
 %MON ad_time_tsnumber             =                 72009
 %MON ad_dynstat_aduvel_max        =   3.4749459081909E+01
 %MON ad_dynstat_aduvel_min        =  -3.3833812610162E+01
 %MON ad_dynstat_aduvel_mean       =  -3.3976996866385E-02
 %MON ad_dynstat_aduvel_sd         =   1.3545133732673E+00
 %MON ad_dynstat_aduvel_del2       =   1.4012211638183E-02
 %MON ad_dynstat_advvel_max        =   2.2962319911420E+01
 %MON ad_dynstat_advvel_min        =  -2.2903063571621E+01
 %MON ad_dynstat_advvel_mean       =  -1.3326518558512E-01
 %MON ad_dynstat_advvel_sd         =   1.3706312764493E+00
 %MON ad_dynstat_advvel_del2       =   1.4279971249511E-02

I am getting the same ad-monitor (same problem) on both my laptop and 
on baudelaire, no MPI, gfortran optfile with -devel.

Does this means that there is a problem with adjDumpFreq ? or with ad-monitor ?
or it's just with this particular set-up ? 

Cheers,
Jean-Michel