ORCAS Giant Nuclei Impactor (GNI) NaCl-equivalent Sea-Salt Size Distributions
https://data.eol.ucar.edu/dataset/490.028

Summary
This dataset contains Giant Nuclei Impactor (GNI) NaCl-equivalent Sea-Salt
Size Distributions collected by the NSF/NCAR GV HIAPER (Gulfstream-V
High-performance Instrumented Airborne Platform for Environmental Research)
aircraft (Tail Number N677F) during the ORCAS (O2/N2 Ratio and CO2 Airborne
Southern Ocean Study) campaign. The size distributions are given as spherical
dry radius in 97 bins each of 0.2 μm width starting from 0.8 μm (center of
bin) and extending to 20 μm (center of bin). The data were obtained by
exposing polycarbonate in the free air streak outside the NSF/NCAR GV
aircraft. Slides are available for ORCAS research flights RF08, RF15 and RF17.
The slides were analyzed in the NCAR/EOL/RAF GNI slide chamber, using a
dual-optical microscope. Slides were inserted into a humidified chamber with a
relative humidity of 90%. 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 (Sodium Chloride)
equivalent radius was determined using the Kohler equation for concentrated
solutions. The size distributions are intended to be used as aerosol size
distributions (Giant Cloud Condensation Nuclei, GCCN) for cloud modeling
studies, as aerosol size distributions for atmospheric radiation studies, and
as aerosol size distributions for atmospheric chemistry studies.

Identifiers
 * Local archive identifier: 490.028
 * doi:10.5065/D69885FD
   https://doi.org/10.5065/D69885FD

Versions
  1.0

Citation
 UCAR/NCAR - Earth Observing Laboratory, Jensen, J. 2017. ORCAS Giant Nuclei
 Impactor (GNI) NaCl-equivalent Sea-Salt Size Distributions. Version 1.0.
 UCAR/NCAR - Earth Observing Laboratory. https://doi.org/10.5065/D69885FD
 Accessed 20 Apr 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
 * ORCAS: The O2/N2 Ratio and CO2 Airborne Southern Ocean (ORCAS) Study
   https://data.eol.ucar.edu/project/ORCAS

Additional information
 * Spatial Type: unknown
 * Frequency: criteria
 * Language: English

Categories
 * Aircraft

Platforms
 * NSF/NCAR GV HIAPER

Instruments
 * Giant Nuclei Impactor - GNI

GCMD Science Keywords
 * EARTH SCIENCE > ATMOSPHERE > AEROSOLS > CLOUD CONDENSATION NUCLEI
 * EARTH SCIENCE > ATMOSPHERE > CLOUDS > CLOUD MICROPHYSICS > PARTICLE SIZE DISTRIBUTION
 * EARTH SCIENCE > ATMOSPHERE > CLOUDS > CLOUD MICROPHYSICS > CLOUD CONDENSATION NUCLEI
 * EARTH SCIENCE > ATMOSPHERE > AEROSOLS > AEROSOL PARTICLE PROPERTIES

Documentation
 * ORCAS_GNI_readme.txt [2 KiB]
   https://data.eol.ucar.edu/file/download/52E24B336C60C/ORCAS_GNI_readme.txt

Restrictions
 * EULA: ORCAS_Data_Fair_Use.html [3 KiB]
   https://data.eol.ucar.edu/file/download/52E24B6B171D7/ORCAS_Data_Fair_Use.html

Related links
 * info: ORCAS Data Policy
   https://www.eol.ucar.edu/content/orcas-data-policy
 * info: ORCAS Missions
   http://catalog.eol.ucar.edu/orcas/tools/missions
 * homepage: ORCAS Project Homepage
   https://www.eol.ucar.edu/field_projects/orcas

Temporal coverage
 * Begin datetime: 2016-02-05 00:00:00 
 * End datetime: 2016-02-29 23:59:59 

Spatial coverage
 * Maximum (North) Latitude: -30.00
 * Minimum (South) Latitude: -80.00
 * Minimum (West) Longitude: -105.00
 * Maximum (East) Longitude: -30.00

Primary contact information
 * pointOfContact: EOL Data Support <datahelp@eol.ucar.edu>
   https://data.eol.ucar.edu/contact/show/1

Additional contact information
 * author: EOL Data Support <datahelp@eol.ucar.edu>
   https://data.eol.ucar.edu/contact/show/1
 * principalInvestigator: Jorgen Jensen <jbj@ucar.edu>
   https://data.eol.ucar.edu/contact/show/54
 * originator: Jorgen Jensen <jbj@ucar.edu>
   https://data.eol.ucar.edu/contact/show/54

Alternate metadata formats
 * DataCite: https://data.eol.ucar.edu/dataset/490.028?format=datacite
 * ISO/TC 211: https://data.eol.ucar.edu/dataset/490.028?format=isotc211