Data from a modelling study of a two-layer boundary-layer cloud system from the Arctic Ocean 2018 expedition I. Bulatovic, J. Savre, C. Leck, M. Tjernström, and A. M. L. Ekman https://doi.org/10.17043/bulatovic-2022-cloud-structure-1

Aerosol particle number size distribution data collected during the Arctic Ocean 2018 expedition L. Karlsson and P. Zieger https://doi.org/10.17043/oden-ao-2018-aerosol-dmps-1

Weather data from MISU weather station during the Arctic Ocean 2018 expedition J. Prytherch https://doi.org/10.17043/oden-ao-2018-misu-weather-3

Ceilometer backscatter, cloud base height and cloud fraction data from the Arctic Ocean 2018 expedition J. Prytherch and M. Tjernström https://doi.org/10.17043/oden-ao-2018-ceilometer-2

Present weather sensor visibility and precipitation data from the Arctic Ocean 2018 expedition J. Prytherch https://doi.org/10.17043/oden-ao-2018-present-weather-1

Radiosonde data from the Arctic Ocean 2018 expedition J. Prytherch, M. Tjernström, J. Vüllers, P. Achtert, I. Brooks, G. Porter, and M. Adams https://doi.org/10.17043/oden-ao-2018-radiosonde-2

Cloudnet remote sensing retrievals of cloud properties during the Arctic Ocean 2018 expedition J. Vüllers, P. Achtert, I. Brooks, R. Neely III, and B. Brooks https://doi.org/10.17043/oden-ao-2018-cloudnet-4