Data for manuscript:"Cloud condensation nuclei at two Finnish sub-Arctic sites: long-term observations of aerosol activation, predictions based on a simple semi-empirical parameterization, and comparison to global climate model simulations"

This submission contains partial data for the manuscript: "Cloud condensation nuclei at two Finnish sub-Arctic sites: long-term observations of aerosol activation, predictions based on a simple semi-empirical parameterization, and comparison to global climate model simulations"

The files and their data are as follows:

Source data for figures and tables:

- Pallas_d50_parameterized.csv: Values for 50% activation diameter, D50, of aerosol particles based on parameterization presented in the manuscript, at Pallastunturi averaged at 1h resolution. Columns for data: 1) DateTime (UTC+2, starting time stamp); 2) D50 diameter, nm

- Pallas_cloud_screened_int_inlet_CCN_parameterized.csv: Cloud condensation nuclei, CCN concentrations from parameterization presented in the manuscript, based on cloud screened, aerosol size distribution measurements from the interstitial aerosol inlet data at Pallastunturi, averaged at 1h resolution. Columns for data: 1) DateTime (UTC+2, starting time stamp); 2) concentration of CCN, #cm-3

- Värriö_CCN_parameterized.csv: Cloud condensation nuclei, CCN concentrations from parameterization presented in the manuscript, based on aerosol size distribution measurements at Värriö, averaged at 1h resolution. Columns for data: 1) DateTime (UTC+2, starting time stamp); 2) concentration of CCN, #cm-3

- Pallas_in_cloud_d50_measured.csv: Values for 50% activation diameter, D50, of aerosol particles during in-cloud events with a combination of aerosol size distribution measurements from the total air- and the interstitial aerosol inlets, at Pallastunturi, averaged at 1h resolution. Columns for data: 1) DateTime (UTC+2, starting time stamp); 2) D50 diameter, nm

- Pallas_in_cloud_CCN_measured.csv: Cloud condensation nuclei, CCN concentrations measured in-cloud with a combination of aerosol size distribution measurements from the total air- and the interstitial aerosol inlets at Pallastunturi, averaged at 1h resolution. Columns for data: 1) DateTime (UTC+2, starting time stamp); 2) concentration of CCN, #cm-3

- Pallas_in_cloud_tot_inlet_CCN_parameterized.csv: Cloud condensation nuclei, CCN concentrations from parameterization presented in the manuscript, based on in-cloud, total aerosol inlet data at Pallastunturi, averaged at 1h resolution. Columns for data: 1) DateTime (UTC+2, starting time stamp); 2) concentration of CCN, #cm-3

Original data for manuscript analysis:

- Pallas_tot_inlet_size_distribution.csv: Aerosol size distribution measured at Pallastunturi from 12.8.2005 to 31.12.2020 averaged at 1h resolution. Columns for data: 1) DateTime (UTC+2, starting time stamp); 2) Total concentration of particles, #cm-3; 3-32) dN/dlogDp, #cm-3, for aerosol bins dp1-dp32 defined in the Pallas_tot_inlet_size_distribution_dp_values.csv -file.

- Pallas_tot_inlet_size_distribution_dp_values.csv: Aerosol bin limits (lower size of 30 bins, m) defined for the data in Pallas_tot_inlet_size_distribution.csv.

- pallas_ccn_0.2_ensmean.nc: NetCDF file of CCN concentration (#cm-3) at 0.2% supersaturation at Pallas, modeled with the EC-Earth3- model. Data is for 1987–2014 at a monthly resolution with 20 vertical levels.

- pallas_ccn_1.0_ensmean.nc: NetCDF file of CCN concentration (#cm-3) at 1.0% supersaturation at Pallas, modeled with the EC-Earth3- model. Data is ensemble mean for 1987–2014 at a monthly resolution with 20 vertical levels.

- varrio_ccn_0.2_ensmean.nc: NetCDF file of CCN concentration (#cm-3) at 0.2% supersaturation at Värriö, modeled with the EC-Earth3- model. Data is ensemble mean for 1987–2014 at a monthly resolution with 20 vertical levels.

- varrio_ccn_1.0_ensmean.nc: NetCDF file of CCN concentration (#cm-3) at 1.0% supersaturation at Värriö, modeled with the EC-Earth3- model. Data is ensemble mean for 1987–2014 at a monthly resolution with 20 vertical levels.

- tm5_2019_2020.nc: The file contains output from TM5-MP, a chemistry transport model, run from January 2019 to September 2020. The file contains global data at 34 vertical levels regarding aerosol-relevant variables, including number concentration for the four aerosol modes.