root mean sq [ OLE2 ROMS-BACKUP lon_rho ]

• latitude of RHO-points (degree_north) [ xi_rho eta_rho Time ]
• longitude of RHO-points (degree_east) [ xi_rho eta_rho Time ]
• Salinidad (PSU) [ xi_rho eta_rho s_rho Time ]
• Temperatura Potencial (degreeC) [ xi_rho eta_rho s_rho Time ]