- modify obcs_diag_balance.F to process each connected-part separately;   exclude OB where Id = 0 but keep the full divergence there (-> constant   Psi along this portion of OB and all inflow derived from grad(Phi))
- modify obcs_diag_balance.F to process each connected-part separately;
  exclude OB where Id = 0 but keep the full divergence there (-> constant
  Psi along this portion of OB and all inflow derived from grad(Phi))

altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h