Evaluation of triple-frequency radar retrieval of snowfall properties using coincident airborne in-situ observations during olympex

Precipitation Retrievals;Global Precipitation Measurement;Triple-Frequency Radar;Snow

Chase, Randy J. ; McFarquhar, Greg M. ; Nesbitt ; Stephen W.

关键词: Precipitation Retrievals;    Global Precipitation Measurement;    Triple-Frequency Radar;    Snow;   

Others  :  https://www.ideals.illinois.edu/bitstream/handle/2142/101185/CHASE-THESIS-2018.pdf?sequence=1&isAllowed=y

美国|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

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.