Variation of wind speed and wind direction with respect to a horizontal or vertical plane; powerful but invisible downdrafts called microbursts focus intense amounts of vertical energy in a narrow funnel that can force an aircraft to the ground nose first if the aircraft is caught underneath
the sudden change in wind direction or speed over a short distance
A sudden drastic change in wind speed, wind direction or both that may occur in the vertical or horizontal plane, resulting in a tearing or shearing affect.
The difference between wind velocity measured at two specific locations divided by the distance between those two positions; wind shear consists of a combination of speed shear and directional shear.
Increase of wind speed with height, due to friction at the earth's surface
the change in wind direction; vertical wind shear is the change in wind speed with height.
A rapid change of wind speed and/or direction with height or distance.
a quick change in wind speed or direction.
A change in wind speed and/or wind direction in a short distance. It can exist in a horizontal or vertical direction and occasionally in both. abbreviation: WS Fr: cisaillement du vent
The change of wind speed or direction with distance or height.
the local variation of the wind speed and/or direction in a given direction. Shear usually refers to vertical wind shear (i.e., the change in wind with height) but the term also is used in Doppler radar meteorology to describe changes in radial velocity over short horizontal distances. Moderate to strong wind shear is required for supercell evelopment. See Bulk Richardson Number.
is a sudden change in wind speed or direction.
A local variation of the wind vector or any of its components in a given direction.
change in wind speed or direction over height
The variation of the wind vector along any direction, usually vertically.
The change of wind speed or direction with distance, usually vertical.
The change of wind speed and/or wind direction over a given distance.
The rate of change of wind direction and/or speed per unit distance; conventionally expressed as vertical and horizontal wind shear.
localised change in wind speed and/or direction over a short distance, resulting in a tearing or shearing effect, usually at low altitude, that can cause a sudden loss of airspeed with occasionally disastrous results if encountered when taking off or landing.
A changing of wind speed or direction with distance; vertical wind shear is changing of wind with respect to height.
The rate of wind speed or direction change with distance. Vertical wind shear is the rate of change of the wind with respect to altitude. Horizontal wind shear is the rate of change on a horizontal plane.
