Mobile Ka-Band Polarimetric Doppler Radar Observations of Wildfire Smoke Plumes
نویسندگان
چکیده
ABSTRACT Remote sensing techniques have been used to study and track wildfire smoke plume structure evolution; however, knowledge gaps remain because of the limited availability observational datasets aimed at understanding fine-scale fire–atmosphere interactions microphysics. Meteorological radars investigate evolution rise in time space, but highly resolved observations are limited. In this study, we present a new mobile millimeter-wave (Ka band) Doppler radar system acquired sample kinematics microphysical properties active plumes from both wildfires large prescribed fires. Four field deployments were conducted autumn 2019 during two California one burn Utah. Radar parameters investigated include reflectivity, radial velocity, spectrum width, differential reflectivity Z DR , copolarized correlation coefficient ρ HV . Observed ranged between −15 20 dB plume, velocity 0 16 m s −1 Dual-polarimetric revealed that scattering sources within primarily nonspherical oblate-shaped targets as indicated by values measuring above below 0.8 plume. width maxima located near updraft core region associated with maxima.
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ژورنال
عنوان ژورنال: Monthly Weather Review
سال: 2021
ISSN: ['1520-0493', '0027-0644']
DOI: https://doi.org/10.1175/mwr-d-20-0198.1