X-band polarimetric observations of cross coupling in the ice phase of convective storms in Taiwan

NCUIR > College of Earth Sciences > Department of Atmospheric Sciences > journal & Dissertation > Item 987654321/100228

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/100228

Title:	X-band polarimetric observations of cross coupling in the ice phase of convective storms in Taiwan
Authors:	廖宇慶;Hubbert, J. C.;Ellis, S. M.;Chang, W.-Y.;Liou, Y.-C.
Contributors:	地球科學學院大氣科學學系
Keywords:	Alignment;Atmospheric research;Atmospherics;Azimuth;Bias;Clouds;Convective storms;Cross coupling;Crystals;Data lines;Data models;Datasets;Depolarization;Electric fields;Horizontal;Horizontal polarization;Ice;Ice crystals;Meteorology;Meteors;Polarimetric radar;Polarimetry;Precipitation;Propagation;Radar;Radar data;Rain;Reflectance;Storms;Superhigh frequencies;Vertical polarization;Weather forecasting;X-band
Date:	2014-01-01
Issue Date:	2026-04-21 13:54:17 (UTC+8)
Publisher:	American Meteorological Society;Boston: American Meteorological Society
Abstract:	摘要： In this paper, experimental X-band polarimetric radar data from simultaneous transmission of horizontal (H) and vertical (V) polarizations (SHV) are shown, modeled, and microphysically interpreted. Both range–height indicator data and vertical-pointing X-band data from the Taiwan Experimental Atmospheric Mobile-Radar (TEAM-R) are presented. Some of the given X-band data are biased, which is very likely caused by cross coupling of the H and V transmitted waves as a result of aligned, canted ice crystals. Modeled SHV data are used to explain the observed polarimetric signatures. Coincident data from the National Center for Atmospheric Research S-band polarimetric radar (S-Pol) are presented to augment and support the X-band polarimetric observations and interpretations. The polarimetric S-Pol data are obtained via fast-alternating transmission of horizontal and vertical polarizations (FHV), and thus the S-band data are not contaminated by the cross coupling (except the linear depolarization ratio LDR) observed in the X-band data. The radar data reveal that there are regions in the ice phase where electric fields are apparently aligning ice crystals near vertically and thus causing negative specific differential phaseK dp. The vertical-pointing data also indicate the presence of preferentially aligned ice crystals that cause differential reflectivityZ drand differential phase ϕdpto be strong functions of azimuth angle. 出版者： Boston: American Meteorological Society 出版日期： 2014-06-01 出處： Journal of applied meteorology and climatology, 2014-06, Vol.53 (6), p.1678-1695 資源來源： EBSCOhost OmniFile Full Text Select 版權： 2014 American Meteorological Society 版權： Copyright American Meteorological Society Jun 2014 版權： Copyright American Meteorological Society 2014 識別號： ISSN: 1558-8424 識別號： ISSN: 1558-8432 識別號： EISSN: 1558-8432 識別號： DOI: 10.1175/JAMC-D-13-0360.1 識別號： CODEN: JOAMEZ
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