Impacts of the Phase Shift between Incident Radar Waves on the Polarization Variables from Ice Cloud Particles

Melnikov, Valery

doi:10.1175/JTECH-D-19-0197.1

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The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners. As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.

i

Impacts of the Phase Shift between Incident Radar Waves on the Polarization Variables from Ice Cloud Particles

2020
By Melnikov, Valery
Source: Journal of Atmospheric and Oceanic Technology, 37(8), 1423-1436

[PDF-2.77 MB]

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Journal Title:

Journal of Atmospheric and Oceanic Technology
Personal Author:

Melnikov, Valery
NOAA Program & Office:

CIMMS (Cooperative Institute for Mesoscale Meteorological Studies) ; OAR (Oceanic and Atmospheric Research) ; NSSL (National Severe Storms Laboratory)

CIMMS (Cooperative Institute for Mesoscale Meteorological Studies) ; OAR (Oceanic and Atmospheric Research) ; NSSL (National Severe Storms Laboratory) Less -
Description:

The impacts of the differential phase of incident radar waves (ψi) on measured differential reflectivity (ZDR), differential phase, and correlation coefficient from ice cloud particles are presented for radars employing simultaneous transmission and reception of orthogonally polarized waves (SHV radar design). The maximal values of ZDR and the differential phase upon scattering (δ) from ice particles are obtained as functions of ψi. It is shown that SHV δ from ice particles can exceed a dozen degrees whereas the intrinsic δ is of a few hundredths of a degree. In melting layers, the δ values from particles obeying the Rayleigh scattering law can be several degrees depending on ψi so that, to explain such δ values, an assumption of resonance scattering is not necessary. The phase δ affects the estimation of specific differential phase (KDP) in icy media and, therefore, the phase δ should be measured. The radar differential phase upon transmission ψt is a part of ψi and, therefore, affects the δ values. A radar capability to alter ψi by varying ψt could deliver additional information about scattering media.
Keywords:

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Radar Observations Remote Sensing
Source:

Journal of Atmospheric and Oceanic Technology, 37(8), 1423-1436
DOI:

https://doi.org/10.1175/JTECH-D-19-0197.1
Document Type:

Journal Article
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urn:sha256:9bcdbc32091c785f81ad69e1aa72e5d493274bc4300ad9de456605218d6c532c
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https://repository.library.noaa.gov/view/noaa/31707/noaa_31707_DS1.pdf
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Impacts of the Phase Shift between Incident Radar Waves on the Polarization Variables from Ice Cloud Particles

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