Entry: Horizontal wind direction at specified distance from reference surface
URI: http://codes.wmo.int/wmdr/ObservedVariableAtmosphere/12005
The direction of horizontal wind expressed in degrees at which the wind originates. This scalar quantity can be used to represent a value at a given location and an instantaneous time or average over spatio-temporal extent or values as a function of spatio-temporal coordinates. Note: 1) Wind direction is coded as 00 under 'Calm' conditions at which the average wind speed is less than or equal to 0.2 m/s (< 1 kt). The direction in this case is coded as 00; 2) Wind direction at stations within 1 degree of the North Pole or 1 degree of the South Pole should be measured so that the azimuth ring should be aligned with its zero coinciding with the Greenwich 0 degree meridian.
Definition
| description |
The direction of horizontal wind expressed in degrees at which the wind originates. This scalar quantity can be used to represent a value at a given location and an instantaneous time or average over spatio-temporal extent or values as a function of spatio-temporal coordinates. Note: 1) Wind direction is coded as 00 under 'Calm' conditions at which the average wind speed is less than or equal to 0.2 m/s (< 1 kt). The direction in this case is coded as 00; 2) Wind direction at stations within 1 degree of the North Pole or 1 degree of the South Pole should be measured so that the azimuth ring should be aligned with its zero coinciding with the Greenwich 0 degree meridian.
|
| label |
Horizontal wind direction at specified distance from reference surface
|
| notation |
12005
|
| type |
Concept
|