Update for CF Version:47
surface_northward_sea_water_velocity
Unit: m s-1
Unit ref: UVAA
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).
sea_water_from_direction
Unit: degree
Unit ref: UAAA
The phrase "from_direction" is used in the construction X_from_direction and indicates the direction from which the velocity vector of X is coming. The direction is a bearing in the usual geographical sense, measured positive clockwise from due north.
sea_water_to_direction
Unit: degree
Unit ref: UAAA
GRIB: 47
The phrase "to_direction" is used in the construction X_to_direction and indicates the direction towards which the velocity vector of X is headed. The direction is a bearing in the usual geographical sense, measured positive clockwise from due north.
surface_eastward_sea_water_velocity
Unit: m s-1
Unit ref: UVAA
The surface called "surface" means the lower boundary of the atmosphere. A velocity is a vector quantity. "Eastward" indicates a vector component which is positive when directed eastward (negative westward).