radar reflectivity"In general, a measure of the efficiency of a radar target in intercepting and returning radio energy. It depends upon the size, shape, aspect, and dielectric properties of the target.
Radar Reflectivity - permalink - collapse
All > Science > Weather
The sum of all backscattering cross-sections (e.g., precipitation particles) in a pulse resolution volume divided by that volume.
Radar reflectivity map.
Hook echo or Pendant
The "hook echo" is the area of confluence between the main updraft and the rear flank downdraft (RFD). This indicates the position of the mesocyclone.
A radar reflectivity pattern observed in a thunderstorm, appearing like a fish hook and indicating favorable conditions for tornadic development. However, hook echoes and tornadoes do not always accompany each other.
HORIZON ...
Effective Radar Reflectivity Factor: See Equivalent Radar Reflectivity Factor.
Effluent Seepage: Diffuse discharge of ground water to the ground surface.
(or hook) A radar reflectivity pattern characterized by a hook-shaped extension of a thunderstorm echo, usually in the right-rear part of the storm (relative to its direction of motion).
V Notch - A radar reflectivity signature seen as a V-shaped notch in the downwind part of a thunderstorm echo.
HAIL SPIKE - A radar reflectivity feature showing a streak or spike-shaped reflectivity region behind (away from the radar site) a high reflectivity region.
Radar ReflectivityThe sum of all backscattering cross-sections (e.g., precipitation particles) in a pulse resolution volume divided by that volume.
dBZNondimensional "unit" of radar reflectivity which represents a logarithmic power ratio (in decibels, or dB) with respect to radar reflectivity factor, Z.
Bounded Weak Echo Region (BWER)(Also known as a vault.) Radar signature within a thunderstorm characterized by a local minimum in radar reflectivity at low levels which extends upward into, and is surrounded by, higher reflectivities aloft.
cell - In radar usage, a local maximum in radar reflectivity that undergoes a life cycle of growth and decay.
The upper sequence depicts the life cycle of a non-severe single cell storm in weak wind shear, with white cloud shapes and gray shades of progressively heavier radar reflectivity. Note the quick collapse of the rainy downdraft through the updraft.
BRIGHT BAND- A maximum in the radar reflectivity caused by snow melting as it falls. Melting snow can have a reflectivity similar to small hail.
(Also known as a vault.) Radar signature within a thunderstorm characterized by a local minimum in radar reflectivity at low levels which extends upward into, and is surrounded by, higher reflectivities aloft.
Bright Band The enhanced layer of radar echo caused by the difference in radar reflectivity of ice and water particles. This echo is interpreted as the delineation on a radar display between frozen and liquid precipitation.
 See also: Radar, Reflectivity, Precipitation, Weather, Air
  
|
RSS
