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Earth Observing Laboratory
Field Data Archive

VOCALS: Giant Cloud Condensation Nuclei (CCN) Impactor Raw Data

Summary

The NCAR/EOL/RAF Giant Cloud Condensation Nuclei Impactor (GNI) samples giant aerosol particles. 

Slides were exposed in the free air stream onto uncoated polycarbonate microscope slides. After exposure in the free air stream, the slides were analyzed in the NCAR/EOL/RAF GNI slide chamber, using a dual-optical microscope. Each slide was inserted into the humidified chamber with a relative humidity of  89.8%. Each file (uncompressed) contains 350 images, but one needs to write the data out as a png file (or similar) in order to see the images.

Data are archived by date and are stored as .tar.gz files. 

For a detailed description, see two manuscripts in preparation by Jensen et al., available from the author.


Data access

  • ORDER data to made available for download

Additional information

Identifier
Data Quality final
Versions
  • 1.0 (2019-06-25)
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Related projects
Frequency continuous
Language English
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Temporal coverage

Begin datetime 2008-10-01 00:00:00
End datetime 2008-11-30 23:59:00

Spatial coverage


Map data from IBCSO, IBCAO, and Global Topography.

Maximum (North) Latitude: -15.00, Minimum (South) Latitude: -30.00
Minimum (West) Longitude: -90.00, Maximum (East) Longitude: -70.00

Primary point of contact information

EOL Data Support <datahelp@eol.ucar.edu>

Additional contact information

Citation

UCAR/NCAR - Earth Observing Laboratory. 2019. VOCALS: Giant Cloud Condensation Nuclei (CCN) Impactor Raw Data. Version 1.0. UCAR/NCAR - Earth Observing Laboratory. https://doi.org/10.26023/ZJVK-ZMF2-VZ0V. Accessed 18 Apr 2025.

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NSF

This material is based upon work supported by the NSF National Center for Atmospheric Research, a major facility sponsored by the U.S. National Science Foundation and managed by the University Corporation for Atmospheric Research. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the U.S. National Science Foundation.