THE INVERSION “BRIGHT BAND”
نویسندگان
چکیده
منابع مشابه
Radar estimates of rainfall rates at the ground in bright band and non-bright band events
The major error in estimating precipitation rates at the ground from radar arises from the change in radar reflectivity (Z) with height. In stratiform precipitation Z rises in the ‘bright band’, where the snow is melting, and then falls steeply in the dry ice above. In regions of vigorous convection containing graupel, the bright band is absent and the fall in Z with height is less marked. If a...
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The enhanced radar return associated with melting snow, ‘the bright band’, can lead to large overestimates of rain rates. Most correction schemes rely on fitting the radar observations to a vertical profile of reflectivity (VPR) which includes the bright band enhancement. Observations show that the VPR is very variable in space and time; large enhancements occur for melting snow, but none for t...
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Bidisperse granular mixtures in spherical tumblers segregate into three bands: one at each pole and one at the equator. For low fill levels, large particles are at the equator; for high fill levels, the opposite occurs. Segregation is robust, though the transition depends on fill level, particle size, and rotational speed. Discrete element method simulations reproduce surface patterns and revea...
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An important tool in flood prediction is quantitative precipitation estimation using weather radars. This study focuses on the VRP's (vertical reflectivity profiles) obtained from SBand RHI scans from the Chilbolton radar in the United Kingdom. The RHI scan consists of several beams, each one elevated at an incremental angle. In an RHI scan pixels represent reflectivity with a corresponding ran...
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ژورنال
عنوان ژورنال: Monthly Weather Review
سال: 1962
ISSN: 0027-0644,1520-0493
DOI: 10.1175/1520-0493(1962)090<0097:tibb>2.0.co;2