"Persistent cloud cover over mega-cities linked to surface heat release by Theeuwes et al., 2019 NPJ Climate and atmospheric science HRV_london_landuse.txt HRV processed time series of cloud fractions [-] over each land use type (pixels have to be 100% of one land use class) "high" - forest/high vegetation "low" - low vegetation "urban" - urban areas "water" - water bodies for London domain. HRV_paris_landuse.txt - HRV processed time series of cloud fractions over each land use type (pixels have to be 100% of one land use class) "high" - forest/high vegetation, "low" - low vegetation, "urban" - urban areas for Paris domain. "london_CBH.csv" - Cloud base heights ("CBH_L") [m] from CL31 ceilometer at London site (Marylebone road) and logical array whether it is clear or clouds are observed in the 15-min period "clear_L, cloudy_L" "chilbolton_CBH.csv" - Cloud base heights ("CBH_C") [m] from CL75K ceilometer at Chilbolton site and logical array whether it is clear or clouds are observed in the 15-min period "clear_C, cloudy_C" raw data: doi:10.5285/1aa2df5a-798b-46c7-b74a-421f9ca0aa82 "london_met.csv" - Data from meteorological measurements at London (Kings College London site): "DIP_L" - dew point depression (air temperature - dew point temperature) [K], "RR_L" - precipitation [mm], "T_L" - absolute air temperature [K], "Td_L" - dew point temperature [K]. "chilbolton_met.csv" - Data from meteorological measurements at Chilbolton: "DIP_C" - dew point depression (air temperature - dew point temperature) [K], "T_C" - absolute air temperature [K], "Td_C" - dew point temperature [K]. "london_fluxes.csv" - Kinematic sensible ("wth_L" [K m s-1]) and latent heat ("wq_L" [kg kg-1 m s-1]) fluxes at London (Kings College London site). "chilbolton_fluxes.csv" - Kinematic sensible ("wth_C" [K m s-1]) and latent heat ("wq_C" [kg kg-1 m s-1]) fluxes at Chilbolton. "2011_chil_lidarwstats.nc" - Hourly statistics of the LiDAR stare data for Chilbolton site. Vertical velocity variance corrected. Note: all Chilbolton raw data: http://catalogue.ceda.ac.uk/uuid/7cbc3fc19bfa037a48ba4cba4b93544d