Effect of restart file and start date on HYCOM outputs

[Dianne Deauna]

Good day,

I have a question regarding the effect of the restart file and start dateon HYCOM model outputs. I am comparing the results from two separate runs which were conducted on the same server, using the same HYCOM version, relax and forcing files but had the following differences:

SEAb04.9

Start date: 2013_234 (August 22)

blkdat.input file:

number of days between model restart output = 9999.0

K-PROF output visc/diff coffs in archive = 0 (FALSE)

SEAb06.1

Start date: 2013_245 (September 2)

blkdat.input file:

number of days between model restart output = 15.25

K-PROF output visc/diff coffs in archive = 1 (TRUE)

When I compare the outputs for September 2, there are considerable differences between salinity, temperature, u and v-velocity. For bathymetry, there also seem to be small differences between the model runs. My question is, are these differences considered normal? If not, how could they be remedied? 

Thank you very much for your consideration.