Giant Cloud Condensation Nuclei (CCN) Impactor Data https://data.eol.ucar.edu/dataset/605.013 Summary The NCAR/EOL/RAF Giant Cloud Condensation Nuclei Impactor (GNI) samples giant aerosol particles. This data set was acquired during the SPICULE project. Slides were exposed in the free air stream onto uncoated polycarbonate microscope slides. The slides were analyzed in the NCAR/EOL/RAF GNI slide chamber, using a dual-optical microscope. Slides were inserted into the humidified chamber with a relative humidity of 89.8 %. The images were analyzed using an automated edge detection algorithm, and using spherical cap geometry to determine the solution drop volume. Subsequently, the equivalent dry NaCl equivalent radius was determined using the Kohler equation for concentrated solutions, specifically Pruppacher and Klett, 1978, eq. 6.26b, using a full chemical potential calculation. Identifiers * Local archive identifier: 605.013 * doi:10.26023/C70R-BFS8-4M0J https://doi.org/10.26023/C70R-BFS8-4M0J Versions 1.0 Citation UCAR/NCAR - Earth Observing Laboratory. 2021. SPICULE: Giant Cloud Condensation Nuclei (CCN) Impactor Data. Version 1.0. UCAR/NCAR - Earth Observing Laboratory. https://doi.org/10.26023/C70R-BFS8-4M0J Accessed 28 Mar 2024. Additional citation styles can be generated by entering the DOI at CrossCite (https://citation.crosscite.org/). Acknowledgement In addition to the citation reference and any other acknowledgements, please acknowledge NCAR/EOL in your publications with text such as: Data provided by NCAR/EOL under the sponsorship of the National Science Foundation. https://data.eol.ucar.edu/ Related projects * SPICULE: Secondary Production of Ice in Cumulus Experiment https://data.eol.ucar.edu/project/SPICULE Additional information * Spatial Type: raster * Frequency: no set schedule * Language: English Platforms * NSF/NCAR GV HIAPER Instruments * Automatic Giant Nuclei Impactor - AutoGNI GCMD Science Keywords * EARTH SCIENCE > ATMOSPHERE > AEROSOLS > CLOUD CONDENSATION NUCLEI * EARTH SCIENCE > ATMOSPHERE > AEROSOLS > AEROSOL PARTICLE PROPERTIES * EARTH SCIENCE > ATMOSPHERE > CLOUDS > CLOUD MICROPHYSICS > CLOUD CONDENSATION NUCLEI Related links * info: Thermodynamic and optical properties of sea salt aerosols https://doi.org/10.1029/97JD01806 * info: SPICULE Data Policy https://www.eol.ucar.edu/content/spicule-data-policy * info: SPICULE Missions http://catalog.eol.ucar.edu/spicule/missions * info: The Giant Nucleus Impactor (GNI)—A System for the Impaction and Automated Optical Sizing of Giant Aerosol Particles with Emphasis on Sea Salt. Part I: Basic Instrument and Algorithms https://doi.org/10.1175/JTECH-D-19-0109.1 * info: SPICULE Project Page https://www.eol.ucar.edu/field_projects/spicule Temporal coverage * Begin datetime: 2021-04-26 00:00:00 * End datetime: 2021-06-30 23:59:59 Spatial coverage * Maximum (North) Latitude: 41.00 * Minimum (South) Latitude: 37.00 * Minimum (West) Longitude: -109.00 * Maximum (East) Longitude: -102.00 Primary contact information * pointOfContact: EOL Data Support https://data.eol.ucar.edu/contact/show/1 Alternate metadata formats * DataCite: https://data.eol.ucar.edu/dataset/605.013?format=datacite * ISO/TC 211: https://data.eol.ucar.edu/dataset/605.013?format=isotc211