Cloud Condensation Nuclei number concentrations over the Southern Ocean during the austral summer of 2016/2017 on board the Antarctic Circumnavigation Expedition (ACE).

Data file(s): ACESPACE_cloud_condensation_nuclei_number_concentration_SS015.csv,
ACESPACE_cloud_condensation_nuclei_number_concentration_SS020.csv,
ACESPACE_cloud_condensation_nuclei_number_concentration_SS030.csv,
ACESPACE_cloud_condensation_nuclei_number_concentration_SS050.csv,
ACESPACE_cloud_condensation_nuclei_number_concentration_SS100.csv

datetime(UTC): Date and time of the start of the 300-second long interval, the N_CCN value is given for, in ISO 8601 format: YYYY-MM-DDThh:mm:ss+00:00. [UTC]
latitude(degree N): Latitude of the ship's position in decimal degrees North at the start of the averaged time period. [decimal degrees north]
longitude(degree E): Longitude of the ship's position in decimal degrees East at the start of the averaged time period. [decimal degrees east]
activation_temperature(K): Temperature of the measurement column inside the instrument. [degrees Kelvin]
number_concentration_of_cloud_condensation_nuclei_at_stp_in_air(m^-3): CCN number concentration at given supersaturation as averaged value for time period from time stamp to 300 seconds after the time stamp. [reciprocal cubic meter]
supersaturation(%): Level of supersaturation inside the measurement instrument for the time period the N_CCN value is given for. [percent]

Null values: nan