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Title:Evaluation of triple-frequency radar retrieval of snowfall properties using coincident airborne in-situ observations during olympex
Author(s):Chase, Randy J.
Advisor(s):Nesbitt, Stephen W.
Contributor(s):McFarquhar, Greg M.
Department / Program:Atmospheric Sciences
Discipline:Atmospheric Sciences
Degree Granting Institution:University of Illinois at Urbana-Champaign
Degree:M.S.
Genre:Thesis
Subject(s):Precipitation Retrievals
Global Precipitation Measurement
Triple-Frequency Radar
Snow
Abstract:Particle scattering models have shown that aggregates and spherical particles occupy distinct regions of the Ku-Ka-W-band Dual-Frequency Ratio (DFR) plane. Furthermore, ground-based observations suggest that particle bulk density and characteristic size can be retrieved from the DFR plane. This is the first study to evaluate the retrieval of particle shape, bulk density and characteristic size using airborne triple-frequency radar observations coincident with airborne in-situ microphysical measurements. Data from the Olympic Mountains Experiment (OLYMPEX) resulted in 2.2 hours of observations that showed the Ku-Ka-W DFR plane offered little unambiguous information about particle shape. Analysis of a case study on 3 December 2015 is consistent with a past modeling study, showing increased bulk density with increased DFR between the Ka- and W-band. Meanwhile, bulk statistics are consistent with a past observational study, showing the potential retrieval of effective density and characteristic size from the DFR Ku-Ka-W plane.
Issue Date:2018-04-18
Type:Text
URI:http://hdl.handle.net/2142/101185
Rights Information:© by Randy J. Chase
Date Available in IDEALS:2018-09-04
2020-09-05
Date Deposited:2018-05


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