Based on continuous observations of the planetary boundary layer (PBL) with anL-band (1357.5 MHz) boundary-layer radar (BLR) at a hilly location in Japan, we have discovered that on clear days, a thin enhanced echo layer corresponding to the top of the PBL (or mixed layer) appeared at about 500 m height in the morning and ascended to about 1500 m in the afternoon. Strong upward velocities were observed below the echo layer (or inside the PBL), reaching 1500 m in the afternoon.
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Hashiguchi, H., Yamanaka, M.D., Tsuda, T. et al. Diurnal variations of the planetary boundary layer observed with anL-band clear-air doppler radar. Boundary-Layer Meteorol 74, 419–424 (1995). https://doi.org/10.1007/BF00712381
- Boundary Layer
- Mixed Layer
- Diurnal Variation