Attenuation Correction of Reflectivity and Differential Reflectivity for Dualpolarization Radar

In this study, empirical A
_H
-K
_DP
and A
_DP
-K
_DP
relationship-based and self-consistent methods were used to correct the attenuation of reflectivity (z
_h
) and differential reflectivity (Z
_DR
) acquired from C- and X-bands dual-polarization radars, and the Z
_h
of S-band Doppler radar was used to evaluate the results. The results indicated that, for Xband dual-polarization radar, the attenuation of Z
_h
and Z
_DR
could be corrected by two methods for heavy and moderate rain, and the distribution of Z
_h
-Z
_DR
scatters were closer to the theoretical relationship after self-consistent correction than that after empirical A
_H
-K
_DP
and A
_DP
-K
_DP
relationship-based correction. For light rain, similar results were obtained for two methods. For C-band dual-polarization radar, the degree of attenuation was less than X-band dual-polarization radar for the same intensity of rainfall, and the attenuation was need to be considered in heavy and moderate rain. For heavy rain, the distribution of Z
_h
-Z
_DR
scatters were closer to the theoretical relationship after empirical A
_H
-K
_DP
and A
_DP
-K
_DP
relationship based correction than that after self-consistent correction. For moderate rain, similar results were obtained for two methods. The corrected reflectivity of C-band dual-polarization radar was closer to that of S-band Doppler radar, however, for X-band dual-polarization radar, it was 5.10 dB larger than that of S-band Doppler radar in heavy rain, 4.64 dB in moderate rain, and 3.34 dB in light rain. It was consistent with the scattering simulation results of other scholars.