Modeling and interpretation of S-band ice crystal depolarization signatures from data obtained by simultaneously transmitting horizontally and vertically polarized fields

NCU Institutional Repository > 地球科學學院 > 大氣科學學系 > 期刊論文 > Item 987654321/100178

請使用永久網址來引用或連結此文件: https://ir.lib.ncu.edu.tw/handle/987654321/100178

題名:	Modeling and interpretation of S-band ice crystal depolarization signatures from data obtained by simultaneously transmitting horizontally and vertically polarized fields
作者:	張偉裕;Hubbert, J. C.;Ellis, S.M.;Chang, W.-Y.;Rutledge, S.;Dixon, M.
貢獻者:	地球科學學院大氣科學學系
關鍵詞:	Alignment;Atmospheric research;Atmospherics;Bias;Boundary conditions;Clouds;Convective cells;Convective storms;Crystals;Datasets;Depolarization;Doppler sonar;Electric fields;Graupel;Ice;Ice crystals;Lightning;Meteorology;Microphysics;Monsoon rainfall;Particle scattering;Polarimetric radar;Polarization;Radar;Radar scattering;Rain;Rainfall;Reflectance;Signatures;Storms;Temperature;Velocity;Vertical air currents;Vertical polarization;Wind
日期:	2014-01-01
上傳時間:	2026-04-21 13:52:25 (UTC+8)
出版者:	American Meteorological Society;Boston: American Meteorological Society
摘要:	摘要： Data collected by the National Center for Atmospheric Research S-band polarimetric radar (S-Pol) during the Terrain-Influenced Monsoon Rainfall Experiment (TiMREX) in Taiwan are analyzed and used to infer storm microphysics in the ice phase of convective storms. Both simultaneous horizontal (H) and vertical (V) (SHV) transmit polarization data and fast-alternating H and V (FHV) transmit polarization data are used in the analysis. The SHVZ dr(differential reflectivity) data show radial stripes of biased data in the ice phase that are likely caused by aligned and canted ice crystals. Similar radial streaks in the linear depolarization ratio (LDR) are presented that are also biased by the same mechanism. Dual-Doppler synthesis and sounding data characterize the storm environment and support the inferences concerning the ice particle types. Small convective cells were observed to have both large positive and large negativeK dp(specific differential phase) values. NegativeK dpregions suggest that ice crystals are vertically aligned by electric fields. Since high \|K dp\| values of 0.8° km−1in both negative and positiveK dpregions in the ice phase are accompanied byZ drvalues close to 0 dB, it is inferred that there are two types of ice crystals present: 1) smaller aligned ice crystals that cause theK dpsignatures and 2) larger aggregates or graupel that cause theZ drsignatures. The inferences are supported with simulated ice particle scattering calculations. A radar scattering model is used to explain the anomalous radial streaks in SHVZ drand LDR. 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.1659-1677 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-13-0158.1 識別號： CODEN: JOAMEZ
顯示於類別:	[大氣科學學系] 期刊論文

文件中的檔案:

檔案	描述	大小	格式	瀏覽次數
index.html		0Kb	HTML	23	檢視/開啟

在NCUIR中所有的資料項目都受到原著作權保護.

社群 sharing

資料載入中.....