Insects: 1. Count the number of chirps for 14 seconds and add 40, this gives the temperature from the "Snowy Tree Criket". 2. 106 Degs. F., Insects are silent above this temperature. 3. 100 Degs. F., Bees are idle. 4. 84 Degs. F.
AngelsRadar echoes caused by birds, insects, and localized refractive index discontinuities.Angle of ReflectionThe angle at which a reflected ray of energy leaves a reflecting surface.
clear-air echo"A radar echo returned from a region of the atmosphere with no apparent meteorological scatterers such as clouds or precipitation. Clear-air echoes are caused by either 1) solid target returns from birds, insects, dust, ...
Growing Degree Days - A heat index that relates the development of plants, insects, and disease organisms to environmental air temperature. The index varies depending on whether it is a cool, warm, or very warm season plant.
Birds, insects, airplanes, and kites are often considered to fly in the sky. It is difficult to define precisely for several reasons.
Backscatter relates to radar signals being reflected off targets other than precipitation such as aeroplanes, topography (mountains and hills), dust (for example, radars in a desert locatality may suffer from dust echoes), birds and swarms of insects.
Radar echoes caused by birds, insects, and localized refractive index discontinuities.
Angle of Reflection ...
Though Australia is now free of many diseases spread by insects, malaria was a problem in the first 30 years of the century, causing from 20 to 50 deaths a year in northern Australia.
Sea Breeze A current of air flowing inland, associated with warmer surface temperatures inland than at sea. Often shows up as a long, thin radar feature as insects get caught up in the frontal region.
Radar that measures speed and direction of a moving object, such as water or ice particles, birds, and insects.
Downwelling(1) ...
"Ground" clutter does not necessarily have to be ground based. Aircraft, birds, and insects may also clutter a NEXRAD image. Clutter echoes are usually characterized by small points of reflected energy distributed in seemingly random pattern.
angel—In radar meteorology, an echo caused by physical phenomena not discernible to the eye; they have been observed when abnormally strong temperature and/or moisture gradients were known to exist; sometimes attributed to insects or birds ...
CLEAR AIR MODE - Weather radar mode operating with higher gain for reflected signal. Often a radar operating in this mode displays information on its screen, which is actually smoke, dust, even birds and insects.
mode of a WSR-88D radar in which the antenna scans slowly, obtaining only 5 elevation slices in 10 minutes. This slow scan speed allows the radar to sense echoes from "clear-air" (i.e., no precipitation). These echoes can be from dirt, insects, smoke, ...
It is used to observe precipitation intensity and movement; determine storm structure; estimate hail potential; locate boundaries (cold front, outflow, lake breeze, etc.); identify cloud layers; and detect light snow, drizzle, birds, insects, ...
 See also: Weather, Temperature, Radar, Wind, Clear
  
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