AOS: Cloud Condensation Nuclei Counter (Dual Column), non-ramping mode

The oliaosccn2colbM1.b1 datastream contains cloud condensation nuclei measurements from the Aerosol Observing System (AOS) Cloud Condensation Nuclei Counter, which operates in non-ramping, dual-column mode. This instrument measures the concentration of aerosol particles by drawing an air sample through a column with supersaturated water vapor that can condense onto aerosol particles, allowing for the counting and sizing of activated particles. The data were collected at Facility M1 (Oliktok Point, Alaska; AMF3), which is located at the OLI site (Oliktok Point, AK, USA; Long-term Mobile Facility), between April 20, 2017, and September 17, 2019. More information about the instrument can be found at the following link: Instrument Handbook.