A high-COP layer with a thickness of 2 to 3 km appeared in the layer above 0[degrees]C, which was determined according to the temperature in Figure 3, in the -30 dBZ
to 15 dBZ
reflectivity factor range over both of the regions and during all the four seasons (See Figure 10).
This product doesn't get interesting until the reflectivity values start to top about 35 dBZ
or so--that's typically the threshold where yellow starts to show up on most NEXRAD radar displays.
Numbers along the axes are distances (km), (left) The gray isosurface is 30 dBZ
. A horizontal cross section of radar reflectivity at an altitude of 500 m is displayed beneath the trajectories in both panels.
(i) Stratiform precipitation characterized by Bright Band and reflectivity ([Z.sub.max]) <40 dBz
(d),(e) Multiyear latitude-height sections of annual zonal-mean cloud (including precipitation falling from cloud) occurrence and precipitation (attenuation-corrected radar reflectivity >0 dBZ
) occurrence; the latter has been doubled to make use of a common color scale [CloudSat geometric profile product (2B-GEOPROF)-lidar dataset].
In conventional study, the threshold is set at 20 dBZ
for reflectivity data.
Unfortunately, low-power returns (<15 dBZ
) could indicate larger cloud drops or ice crystals in a thunderstorm anvil.
la is reflected by the high frequencies of radar reflectivities between 15 and 25 dBZ
at heights between 5 and 10 km and around 10 dBZ
below 5 km in Fig.
Convective clouds developed up to >16 km, the cloud anvil in the upper levels extended outward, and the most intensive reflectivity (>10 dBz
) was located at 5-13 km.
Conventional radar cannot tell you directly about the potential for lightning, although a high dBZ
return on the radar makes it a good bet that lightning is nearby.
(a) Composite radar reflectivity (shading, dBZ
) at 1500 LST 4 Oct 2015.
The mean square error decreased from 14.5655 to 2.3476 dBz
, and the mean deviation decreased from 0.3011 to 0.0113 dBz