This page contains comparison results between the scanning radars and profiler-pair for the 990126 event. The purpose of the comparison is to provide cross-validation information on kinematic and microphysical structure for each platform. The work is a collaborative effort between the CSU Radar Meteorology Group, the NOAA Aeronomy Laboratory, and NCAR ATD.
These plots show dual Doppler vertical air motion and reflectivity (S-pol data) over the location of the profiler site. A 2 km X 2 km box was used to extract the data over the profiler site. Within the box, average, maximum, minimum, and nearest neighbor point values were determined. The profiler-pair was located 41.7 km at an azimuth of 22.8 deg from the S-pol radar site (38.5 km N and 16.1 km E of S-pol).
These plots show time series of various polarimetric quantities over the profiler site (Zh, Zdr, D0,LWC) using a 3-gate average (in range) of the S-pol data closest to the profiler location (3 different heights).
Horizontal reflectivity (Zh) and differential reflectivity (Zdr) are raw fields collected by S-pol.
The derived quantity median volume diameter (D0) is based on a relation:
D0(Zdr) = 1.529*(Zdr)^0.467 [mm]
The derived quantity LWC is based on the following relations:
LWC(Zh) = 0.00344*(Zh)^(4/7) [gm/m^3]
LWC(Zh,Zdr) = c*(Zh)^a*10^(b*Zdr) [gm/m^3] ; a=0.886, b=0.4159, c=0.0007
LWC(Kdp) = 0.34*(Kdp*10.0)^(0.702)
