A Hydrometeor Classification Method for X-Band Polarimetric Radar: Construction and Validation Focusing on Solid Hydrometeors under Moist Environments

AbstractA fuzzy-logic-based hydrometeor classification (HC) method for X-band polarimetric radar (X-pol), which is suitable for observation of solid hydrometeors under moist environments producing little or no hail, is constructed and validated. This HC method identifies the most likely hydrometeor at each radar sampling volume from eight categories: 1) drizzle, 2) rain, 3) wet snow aggregates, 4) dry snow aggregates, 5) ice crystals, 6) dry graupel, 7) wet graupel, and 8) rain–hail mixture. Membership functions are defined on the basis of previous studies. The HC method uses radar reflectivity Zh, differential reflectivity Zdr, specific differential phase Kdp, and correlation coefficient ρhv as its main inputs, and temperature with some consideration of relative humidity as supplemental information. The method is validated against ground and in situ observations of solid hydrometeors (dry graupel, dry snow aggregates, and ice crystals) under a moist environment. Observational data from a ground-based ima...

[1]  T. Matsuo,et al.  Development of the Hydrometeor Videosonde , 1990 .

[2]  V. Chandrasekar,et al.  A Robust C-Band Hydrometeor Identification Algorithm and Application to a Long-Term Polarimetric Radar Dataset , 2013 .

[3]  Roy Rasmussen,et al.  Melting and Shedding of Graupel and Hail. Part I: Model Physics , 1987 .

[4]  V. Chandrasekar,et al.  Hydrometeor classification system using dual-polarization radar measurements: model improvements and in situ verification , 2005, IEEE Transactions on Geoscience and Remote Sensing.

[5]  Frank S. Marzano,et al.  Hydrometeor classification from dual-polarized weather radar: extending fuzzy logic from S-band to C-band data , 2006 .

[6]  Ken-ichiro Muramoto.  Determination of Shape and Fall Velocity of Raindrops by lmage Processing , 1995, IEICE Trans. Inf. Syst..

[7]  V. Chandrasekar,et al.  Algorithm for Estimation of the Specific Differential Phase , 2009 .

[8]  Midori Matsuo,et al.  Graupel in the different developing stages of Baiu monsoon clouds observed by videosondes , 2014 .

[9]  K. Ninomiya,et al.  Characteristics of Baiu Front as a Predominant Subtropical Front in the Summer Northern Hemisphere , 1984 .

[10]  V. Chandrasekar,et al.  Short wavelength technology and the potential for distributed networks of small radar systems , 2009, 2009 IEEE Radar Conference.

[11]  Alexander V. Ryzhkov,et al.  The Hydrometeor Classification Algorithm for the Polarimetric WSR-88D: Description and Application to an MCS , 2009 .

[12]  M. Oue,et al.  Two types of precipitation particle distribution in convective cells accompanying a Baiu frontal rainband around Okinawa Island, Japan , 2010 .

[13]  Peter V. Hobbs,et al.  Fall speeds and masses of solid precipitation particles , 1974 .

[14]  Jerry M. Straka,et al.  Bulk Hydrometeor Classification and Quantification Using Polarimetric Radar Data: Synthesis of Relations , 2000 .

[15]  K. Ninomiya,et al.  Multi-scale Features of Baiu, the Summer Monsoon over Japan and the East Asia , 1992 .

[16]  Tsutomu Takahashi.  Near absence of lightning in torrential rainfall producing Micronesian thunderstorms , 1990 .

[17]  H. Mizuno,et al.  Statistical characteristics of graupel precipitation over the Japan islands , 1992 .

[18]  V. Chandrasekar,et al.  Classification of Hydrometeors Based on Polarimetric Radar Measurements: Development of Fuzzy Logic and Neuro-Fuzzy Systems, and In Situ Verification , 2000 .

[19]  K. Ninomiya,et al.  Characteristic Features of “Baiu” Front Associated with Heavy Rainfall , 1971 .

[20]  V. Chandrasekar,et al.  Polarimetric Radar Observations in the Ice Region of Precipitating Clouds at C-Band and X-Band Radar Frequencies , 2013 .

[21]  Dmitri Moisseev,et al.  Recent advances in classification of observations from dual polarization weather radars , 2013 .

[22]  Steven A. Rutledge,et al.  The 29 June 2000 Supercell Observed during STEPS. Part I: Kinematics and Microphysics , 2005 .

[23]  K. Muramoto,et al.  A New Method for Identifying the Main Type of Solid Hydrometeors Contributing to Snowfall from Measured Size-Fall Speed Relationship , 2013 .

[24]  T. Matsuo,et al.  Relationship between Types of Precipitation on the Ground and Surface Meteorological Elements , 1981 .

[25]  Katsuhiro Nakagawa,et al.  Development of a New Videosonde Observation System for In-situ Precipitation Particle Measurements , 2012 .

[26]  J. Curry,et al.  Fall Velocities of Hydrometeors in the Atmosphere: Refinements to a Continuous Analytical Power Law. , 2005 .

[27]  Koyuru Iwanami,et al.  Dual-Doppler Radar Observations on Factors Causing Differences in the Structure of Snow Clouds during Winter Monsoon Surges , 2004 .

[28]  M. Oue,et al.  Vertical distribution of precipitation particles in Baiu frontal stratiform intense rainfall around Okinawa Island, Japan , 2015 .

[29]  Guifu Zhang,et al.  Attenuation Correction and Hydrometeor Classification of High-Resolution, X-band, Dual-Polarized Mobile Radar Measurements in Severe Convective Storms , 2009 .

[30]  Frank S. Marzano,et al.  Supervised Classification and Estimation of Hydrometeors From C-Band Dual-Polarized Radars: A Bayesian Approach , 2008, IEEE Transactions on Geoscience and Remote Sensing.

[31]  M. Kubo,et al.  Shape classification of snow particle into snowflake and graupel using image processing , 2009, 2009 ICCAS-SICE.

[32]  V. Chandrasekar,et al.  A Dual-Polarization Radar Hydrometeor Classification Algorithm for Winter Precipitation , 2014 .

[33]  Brenda Dolan,et al.  A Theory-Based Hydrometeor Identification Algorithm for X-Band Polarimetric Radars , 2009 .

[34]  A. R. Jameson.  The effect of temperature on attenuation-correction schemes in rain using polarization propagation differential phase shift , 1992 .

[35]  Patrick C. Kennedy,et al.  S-Band Dual-Polarization Radar Observations of Winter Storms , 2011 .

[36]  T. Matsuo,et al.  Melting of snow flakes below freezing level in the atmosphere , 1981 .

[37]  Stephen J. Frasier,et al.  A New Fuzzy Logic Hydrometeor Classification Scheme Applied to the French X-, C-, and S-Band Polarimetric Radars , 2013 .

[38]  Alexander V. Ryzhkov,et al.  Cloud Microphysics Retrieval Using S-Band Dual-Polarization Radar Measurements , 1999 .

[39]  Nobuhiro Takahashi,et al.  Characteristics of Polarimetric Radar Variables in Three Types of Rainfalls in a Baiu Front Event ov , 2009 .