Two Layers of Melting Ice Particles Within a Single Radar Bright Band : Interpretation and Implications

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http://hdl.handle.net/10138/320525

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Li , H & Moisseev , D 2020 , ' Two Layers of Melting Ice Particles Within a Single Radar Bright Band : Interpretation and Implications ' , Geophysical Research Letters , vol. 47 , no. 13 , e2020GL087499 . https://doi.org/10.1029/2020GL087499

Title: Two Layers of Melting Ice Particles Within a Single Radar Bright Band : Interpretation and Implications
Author: Li, Haoran; Moisseev, Dmitri
Other contributor: University of Helsinki, Radar Meteorology group
University of Helsinki, Institute for Atmospheric and Earth System Research (INAR)


Date: 2020-07-16
Language: eng
Number of pages: 10
Belongs to series: Geophysical Research Letters
ISSN: 0094-8276
DOI: https://doi.org/10.1029/2020GL087499
URI: http://hdl.handle.net/10138/320525
Abstract: Dual-frequency dual-polarization radar observations of the melting of two ice populations in a stratiform rainfall event are presented. The observed phenomenon occurs as a two-layer linear depolarization ratio (LDR) signature in a single radar bright band. Doppler spectra observations show that the upper LDR layer is caused by the melting of ice needles, potentially generated by the rime-splintering process, while the lower one is mainly due to the melting of background ice particles formed at the cloud top. The melting signal of small needles acts as a unique benchmark for detecting the onset of melting and is used to verify the current methods for the identification of melting layer boundaries. The radar-derived characteristics of the melting layer are found to be dependent on the radar variable and frequency used. The implications of the presented findings for radar-based studies of precipitation properties in and above the melting layer are also discussed.
Subject: 114 Physical sciences
1171 Geosciences
Melting layer</AUTHOR_KEYWORD>
Multi-frequency radars</AUTHOR_KEYWORD>
Dual-polarization radar</AUTHOR_KEYWORD>
Ice needles</AUTHOR_KEYWORD>
POLARIMETRIC RADAR
SNOW
PRECIPITATION
CLOUD
RAIN
SIGNATURES
BACKSCATTERING
REFLECTIVITY
AIRCRAFT
PROFILES
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