Cloud radar observations of precipitation
نویسنده
چکیده
An innovative method for the observation of vertical air motion and raindrop size distribution in precipitation using a 94-GHz Doppler radar is demonstrated in this paper. The method is particularly appealing since it is based on fundamental physics, the scattering of microwave radiation by large particles (Mie scattering). Observations from stratiform rain are presented to illustrate the potential and accuracy of the method. The retrievals from this technique provide vertical air motion to an accuracy of 5–10 cm s−1. The data revealed high-resolution kinematical and microphysical structures within the stratiform precipitation for the surface to the melting level. Such observations can enhance our understanding of physical processes that affect the final shapes of DSD in stratiform rain, like evaporation, turbulence and vertical air drafts. The observations were collected at the University of Miami’s multi-frequency groundbased radar facility (W, S and UHF-band radars). The ensemble of radars at this facility can provide high temporal and spatial resolution profiles of vertical air motion and DSDs in stratiform and convective precipitation.
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تاریخ انتشار 2002