Table 9 Description of SiteID_ccn_colb_avgt.csv file.

Start_date

Start date in UTC (yyyy-mm-dd hh:mm:ss format)

End_date

End date in UTC (yyyy-mm-dd hh:mm:ss format)

SS_setpoint_B

Column B supersaturation setpoint value (%). Referred to as SS_setpoint,B in manuscript text.

SS_actual_B

Column B mean value of the supersaturation actual values corresponding to the mean filtered N_CCN,B (see N_CCN_mean_STP_B) (%). Referred to as mean SS_act,B in manuscript text.

N_CCN_mean_STP_B

Column B mean value of the high resolution N_CCN,B for each mean SS_act,B, filtered to only include the values between the 25th and 75th percentile of the high resolution N_CCN,B values for the file averaging time (5-min or 1-h). Converted to STP (see P_CCNC_B, T_CCNC_B) (cm⁻³). Referred to as mean N_CCN,B in manuscript text.

P_CCNC_B

CCNC column B sample pressure. Mean value of the pressure of the mean filtered N_CCN,B (see N_CCN_mean_STP_B) (hPa).

T_CCNC_B

CCNC column B sample temperature. Mean value of the temperature of the mean filtered N_CCN,B (see N_CCN_mean_STP_B) (^oC).

Q_sample_B

CCNC column B sample flow. Mean value of the volumetric flow rate of sample air of the mean filtered N_CCN,B (see N_CCN_mean_STP_B) (cm³min⁻¹).

Q_sheath_B

CCNC column B sheath flow. Mean value of the volumetric flow rate of sheath air of the mean filtered N_CCN,B (see N_CCN_mean_STP_B) (cm³min⁻¹).

N_CN_CPC_STP_B

Total particle concentration from CPC at STP temporally matched with mean filtered N_CCN,B. Converted to STP with P_CCNC_B and T_CCNC_B (cm⁻³). Referred to as N_tot,CPC in manuscript text.

N_CN_SMPS_STP_B

Total particle number concentration calculated from SMPS size distribution at STP. Mean value of 5-min/1-h SMPS measurement (cm⁻³). Referred to as N_tot,SMPS in manuscript text.

Critical_diameter_B

Critical diameter calculated with N_CCN_mean_STP_B and the corresponding time period of SMPS data (nm). Referred to as D_crit in manuscript text.

Kappa_B

Hygroscopicity parameter obtained from D_crit and Eq. 4. Referred to as κ_CCN in manuscript text.

Activation_fraction_CPC_B

Ratio of activated particles. N_CCN_mean_STP_B /N_CN_CPC_STP_B. Referred to as AF_CPC in manuscript text.

Activation_fraction_SMPS_B

Ratio of activated particles. N_CCN_mean_STP_B /N_CN_SMPS_STP_B. Referred to as AF_SMPS in manuscript text.

Qc_CCN04_N80_B

Quality check of CCN number closure at 0.4% SS. Flag indicates comparison of N_CCN_mean_STP_B at 0.4% SS for column B CCNC and mean value of number concen- tration of particles greater than 80 nm (N80) of the corresponding time period data at STP for SMPS. Qc = 0 differences smaller than 50%; Qc = 1 differences bigger than 50%.

Qc_CPC_SMPS

Quality check of number closure. Flag indicates comparison of N_tot,SMPS and N_tot,CPC. Qc = 0 differences smaller than 50%; Qc = 1 differences bigger than 50%.