Dear Michael, thank you very much. After all those years using HYCOM I had never seen this link in the website.
Can I ask a few questions? I understand that SSH is not a prognostic variable in HYCOM, but I see in the study by Cummings (2007) and also in other papers found in the link to Data Assimilation, that altimeter SSH data are assimilated in HNCODA. I think that the correlation between SSH and layer thickness is used somehow. In the process of assimilating SSH you actually use SLA, right ? SLA = SSH - MSL.
Would you say that the mean GLBv0.08 SSH (above) can be used as MSL to obtain SLA from a given SSH ?
I am asking it because I am using HYCOM U/V/T/S/SSh in the open boundaries of a regional ROMS domain. After a few years of model integration, the annual mean SSh is higher near the boundaries than in the middle of the domain. This is causing higher errors near the boundaries in my simulations with Ensemble Optimal Interpolation. So, I want to correct HYCOM SSh before I impose it in the open boundaries. I want to decrease the hycom MSL and add the satellite MDT to correct SSH.
Well, please let me know what are your insights about it.