"The surface called \"surface\" means the lower boundary of the atmosphere. A velocity is a vector quantity. \"Northward\" indicates a vector component which is positive when directed northward (negative southward). \"Geostrophic\" indicates that geostrophic balance is assumed. \"Water\" means water in all phases. \"sea_level\" means mean sea level. The geoid is a surface of constant geopotential with which mean sea level would coincide if the ocean were at rest. surface_northward_sea_water_geostrophic_velocity_assuming_sea_level_for_geoid is the variable part of surface_northward_sea_water_geostrophic_velocity. The assumption that sea level is equal to the geoid means that the stationary component of ocean circulation is equal to zero."@en . . "SDN:P07::CFSN0782" . . . . . "1" . "SDN:P07::CFSN0782" . . "" . "deprecated"@en . . "2008-04-15 14:00:00.0" . "1" . "true" . . . . "SDN:P07::CFSN0782" . "surface_northward_geostrophic_sea_water_velocity_assuming_sea_level_for_geoid"@en . . "2008-04-15 14:00:00.0" .