Multi product comparison during BELLA-ABL Campaign across different Lidar System

The BELLA measurement campaign took place at the CNR-IMAA Atmospheric Observatory (CIAO), where a large ensemble of instruments, including ceilometers, a Raman lidar, a wind Doppler lidar, a Ka band Doppler radar, a microwave radiometer and different types of in-situ sensors, were operated on a continuous basis over the period April-June 2024. The measurement effort also benefitted from the continous operation throughout the campaign duration of the Raman lidar system CONCERNIG Lidar, located approx. 7 km south-eastward of CIAO, at University of Basilicata in Potenza. All lidar systems involved in the measurement campaign were operated with high space and time resolution, typically 5-10 m and 10 sec, respectively, with vertical profiling capability both in daytime and nighttime for different atmospheric components/variables, including water vapour mixing ratio, CO₂ mixing ratio, temperature and particle (aerosol and clouds) optical (backscatter/extinction) properties. This measurement capability, relying on different ABL tracers/properties is very effective in the characterization of the Atmospheric Boundary Layer structure and depth. Estimates of the ABLH obtained from the different parameters measured by CONCERNING are compared with those obtained from the radiosonde and Raman lidar measurements at CIAO, properly revealing differences associated with the different approaches and with atmospheric variability. In this work our attention is focused on two specific case studies (15-16 April 2024 and 28 April-01 May 2024), with results revealing a good agreement, quantified in terms of absolute and percentage BIAS, between the different sensors and approaches. 

Acknowledgment
The authors acknowledge Next Generation EU Mission 4 “Education and Research” - Component 2: “From research to business” - Investment 3.1: “Fund for the realization of an integrated system of research and innovation infrastructures” - Project IR0000032 – ITINERIS.