Assessing CALIOP-Derived Planetary Boundary Layer Height Using Ground-Based Lidar

Coincident profiles from the space-borne and ground-based lidar measurements provide a unique opportunity to estimate planetary boundary layer height (PBLH). In this study, PBLHs derived Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) were assessed by comparing them those obtained at Seoul National University (SNU) in Korea for both day night 2006 2019, sounding data. CALIOP-derived using wavelet covariance transform (WCT) are generally higher than SNU night. The difference PBLH tends increase as signal-to-noise ratio CALIOP decreases. also increases aerosol optical depth increases, implying that estimated could be determined because of signal attenuation within under optically thick conditions. study is mainly attributed multiple layers. After eliminating multilayer cases, lidars showed significantly improved agreement: mean 0.09 km (R = 0.81) daytime 0.25 0.51) nighttime. results suggest PBL detection reliable if cases removed. For nighttime, relatively large frequency distribution compared It suggests further investigations needed nighttime PBLHs, such about discriminating residual between lidar-derived based on thermally radiosonde data stable during