Ice Nucleating Particle number concentration over the Southern Ocean during the austral summer of 2016/2017 on board the Antarctic Circumnavigation Expedition (ACE).

Data files: ACESPACE_ice_nucleating_particle_number_concentration_Tminus15degC.csv

File header

startDATETIME [UTC]: Date and time of the start of the sampling of each filter in ISO 8601 format YYYY-MM-DDThh:mm:ss+00:00 [UTC]
startLatitude [degN]: Latitude of the ship's position at the start of the filter sampling period [decimal degrees North]
startLongitude [degE: Longitude of the ship's position at the start of the filter sampling period [decimal degrees East]
endDATETIME [UTC]: Date and time of the end of the sampling of each filter in ISO 8601 format YYYY-MM-DDThh:mm:ss+00:00 [UTC]
endLatitude [degN]: Latitude of the ship's position at the end of the filter sampling period [decimal degrees North]
endLongitude [degE]: Longitude of the ship's position at the end of the filter sampling period [decimal degrees East]
K [-15degC, m^-3]: Derived cumulative nucleus concentration (K) of ice nucleating particles (INP) at -15 degrees Celsius for each filter from off-line analysis using a droplet freezing array method [m^-3]

NaN
For latitude and longitude NaN values are given, in cases positioning data was not available for given time period. INP number concentration values can be equal zero, indicating material sampled not being ice active at given temperature. In some cases, given INP number concentration values represent the upper detection limit of the used method.