Long-Term Radar Observations of the Melting Layer of Precipitation and Their Interpretation

摘要: Abstract In this study, 600 h of vertically pointing X-band radar data and 50 UHF boundary layer wind profiler were processed analyzed to characterize quantitatively the structure causes signature from melting precipitation. Five classes vertical profiles reflectivity in rain identified, with three them having precipitation undergoing a transition between solid liquid phase. Only one them, albeit most common, showed brightband signature. In-depth study bright band its dependence on intensity reveals that ratio peak rainfall is constant at 8 dB below 0.5 mm h−1 then increases reach 13 2.5 16 5 h−1. The equivalent factor snow just above average 1–2 layer, independent intensity. classical explanation...