TECHNICAL INFO The mixed-layer height was derived from the attenuated backscatter profile with the STRATfinder algorithm, which uses vertical gradient- and variance-based layer detection with adaptive thresholds and temporal consistency constraints. Data quality control was carried out using the QC STRATfinder algorithm that applies empirically defined physical plausibility criteria to flag and reject unreliable mixed-layer height detections. No gap-filling has been applied. ACKNOWLEDGEMENTS Authors thank SIRTA/LMD staff for providing support and facilities; ATMO-TNA-3—0000000125 funding. COPYRIGHT NOTICE Copyright Jörn Birkmann, Andreas Christen, Nektarios Chrysoulakis, and Sue Grimmond. Some rights reserved. CREATOR NOTICE This work is owned by the Principal Investigators (PIs) of the Urbisphere project. ATTRIBUTION NOTICE The [creation and] curation of this work has been funded by the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (grant agreement No 855005). The curation of the data has received support from the UrbanAIR project funded by the European Union (grant agreement No 101188131). DISCLAIMER NOTICE The use of the work is at the user's own risk. The authors, the involved institutions, and/or the European Research Council accept no liability for material or non-material damage arising from the use or non-use or from the use of incorrect or incomplete information in this work. The authors, the involved institutions, and/or the European Research Council are not responsible for any use that may be made of the information in this work. The legal provisions remain unaffected. MATERIAL NOTICE The notices cover data in databases, text and images contained in the work. MATERIAL URI Urbisphere project LICENSE URI Creative Commons Attribution 4.0 International License

Curated data files and derived quantities from Automatic Lidar Ceilometer (ALC) measurements.