Multimodality of cloud radar Doppler spectra is used to partition cloud particle phases and separate distinct ice populations in the radar sample volume, thereby facilitating the analysis of individual ice showers in multilayered mixed-phase clouds. A 35-GHz cloud radar located at Barrow, Alaska, during the Mixed-Phase Arctic Cloud Experiment collected the Doppler spectra. Data from a pair of collocated depolarization lidars confirmed the presence of two liquid cloud layers reported in this letter. Both of these cloud layers were embedded in ice precipitation yet maintained their liquid. The spectral separation of the ice precipitation yielded two distinct ice populations: the ice initiated within the two liquid cloud layers and the ice precipitation formed in the higher cloud layers. The comparisons of ice fall velocity-versus-radar reflectivity relationships derived for distinct showers reveal that a single relationship does not properly represent the ice showers during this period.
机构:
Brookhaven Natl Lab, Div Atmospher Sci, Upton, NY 11973 USABrookhaven Natl Lab, Div Atmospher Sci, Upton, NY 11973 USA
Luke, Edward P.
Kollias, Pavlos
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McGill Univ, Dept Atmospher & Ocean Sci, Montreal, PQ H3A 2K6, CanadaBrookhaven Natl Lab, Div Atmospher Sci, Upton, NY 11973 USA
Kollias, Pavlos
Shupe, Matthew D.
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Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA
NOAA, Boulder, CO USABrookhaven Natl Lab, Div Atmospher Sci, Upton, NY 11973 USA
机构:
Key Laboratory of Cloud-Precipitation Physics and Severe Storms Institute of Atmospheric Physics,Chinese Academy of SciencesKey Laboratory of Cloud-Precipitation Physics and Severe Storms Institute of Atmospheric Physics,Chinese Academy of Sciences
ZHAO Zhen
LEI Hengchi
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Key Laboratory of Cloud-Precipitation Physics and Severe Storms Institute of Atmospheric Physics,Chinese Academy of SciencesKey Laboratory of Cloud-Precipitation Physics and Severe Storms Institute of Atmospheric Physics,Chinese Academy of Sciences