Atmospheric Measurement Techniques
Atmospheric Measurement Techniques
AMT
Articles | Volume 19, issue 4
Articles | Volume 19, issue 4
https://doi.org/10.5194/amt-19-1551-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-19-1551-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 4
Research article
 | 
03 Mar 2026
Research article |  | 03 Mar 2026

Evaluate the impact of power-law scattering amplitude fitting on dual-polarization radar data assimilation – summertime cases study

Kao-Shen Chung, Chin-Chuan Chang, Bing-Xue Zhuang, Chih-Chien Tsai, Chen-Hau Lan, and Wei-Yu Chang

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Cited articles

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Augros, C., Caumont, O., Ducrocq, V., Gaussiat, N., and Tabary, P.: Comparisons between S-, C- and X-band polarimetric radar observations and convective-scale simulations of the HyMeX first special observing period, Q. J. Roy. Meteor. Soc., 142, 347–362, https://doi.org/10.1002/qj.2572, 2016. 
Augros C., Caumont, O., Ducrocq, V., and Gaussiat, N.: Assimilation of radar dual-polarization observations in the AROME model, Q. J. Roy. Meteor. Soc., 144, 1352–1368, https://doi.org/10.1002/qj.3269, 2018. 
Brandes, E. A., Zhang, G., and Vivekanandan, J.: Experiments in Rainfall Estimation with a Polarimetric Radar in a Subtropical Environment, J. Appl. Meteorol., 41, 674–685, https://doi.org/10.1175/1520-0450(2002)041<0674:EIREWA>2.0.CO;2, 2002. 
Cao, Q., Zhang, G., Brandes, E., Schuur, T., Ryzhkov, A., and Ikeda, K.: Analysis of video disdrometer and polarimetric radar data to characterize rain microphysics in Oklahoma, J. Appl. Meteorol. Clim., 47, 2238–2255, https://doi.org/10.1175/2008JAMC1732.1, 2008. 
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This study compares two configurations of the dual-polarization observation operator for radar data assimilation. The power-law method efficiently simulates reflectivity but may introduce a bias in differential reflectivity. The direct integration approach yields more accurate and realistic simulations of both variables, with lower residuals, making it the more proper operator for dual-pol radar data assimilation.
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