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Simulation of Radar Reflectivity and Surface Measurements of Rainfall
Publisher: American Meteorological Society
Abstract: Raindrop size distributions (RSDs) are often estimated using surface raindrop sampling devices (e.g., disdrometers) or optical array (2D-PMS) probes. A number of authors have used these measured distributions to compute ...
Error Structure of Multiparameter Radar and Surface Measurements of Rainfall Part II: X-Band Attenuation
Publisher: American Meteorological Society
Abstract: In Part II of this study, simulations of multiparameter radar observables to include X-band specific attenuation (A) are performed in order to study the relationship between A, Z, and ZDR. We also compute the triplet (A, ...
Error Structure of Multiparameter Radar and Surface Measurements of Rainfall Part I: Differential Reflectivity
Publisher: American Meteorological Society
Abstract: Fluctuations in the radar measurements of ZDR are due to both signal power fluctuations and the cross-correlation between the horizontal and vertical polarized signals. In Part I of this study, these signals are simulated ...
Drop Axis Ratios from a 2D Video Disdrometer
Publisher: American Meteorological Society
Abstract: Results from an experiment to measure the drop shapes using a 2D video disdrometer (2DVD) are reported. Under calm conditions, drops were generated from a hose located on a bridge 80 m above ground, this height being ...
An Iterative Filtering Technique for the Analysis of Copolar Differential Phase and Dual-Frequency Radar Measurements
Publisher: American Meteorological Society
Abstract: Copolar differential phase is composed of two components, namely, differential propagation phase and differential backscatter phase. To estimate specific differential phase KDP, these two phase components must first be ...
Application of the Generalized Gamma Model to Represent the Full Rain Drop Size Distribution Spectra
Publisher: American Meteorological Society
Abstract: Abstract We report on measurements of drop size distributions (DSD) using collocated instruments (a Droplet Measurement Technologies, Inc., Meteorological Particle Spectrometer and a 2D-video disdrometer) from two locations ...
Evaluation of a New Polarimetrically Based Z–R Relation
Publisher: American Meteorological Society
Abstract: A new polarimetrically based (or, pol-based) Z?R relation of the form Z = aR1.5 is described and evaluated where the multiplicative coefficient a is continuously adjusted as the drop size distribution evolves in space and ...
Multiparameter Radar Modeling and Observations of Melting Ice
Publisher: American Meteorological Society
Abstract: This paper uses a microphysically detailed graupel and hail melting model, described by Rasmussen and Heymsfield, which is coupled to a radar model that computes multiparameter variables such as differential reflectivity, ...
On the Possible Use of Copolar Correlation Coefficient for Improving the Drop Size Distribution Estimates at C Band
Publisher: American Meteorological Society
Abstract: A decrease in copolar correlation coefficient (?co) at C band has been observed for several rain events with broad drop size distributions (DSDs). Observational evidence comes from simultaneous measurements with a C-band ...
Dual-Polarization observations of Microbursts Associated with Intense Convection: The 20 July Storm during the MIST Project
Publisher: American Meteorological Society
Abstract: A detailed case study of the microbrust-producing storm on 20 July 1986 during the MIST Project is presented, together with visual (based on cloud photogrammetry) and radar observations during the life cycle of the storm. ...