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VOCALS Giant Nuclei Impactor (GNI) NaCl-equivalent Sea-Salt Size Distributions

Summary

This dataset contains Giant Nuclei Impactor (GNI) NaCl-equivalent Sea-Salt Size Distributions collected during the VOCALS (VAMOS Ocean-Cloud-Atmosphere-Land Study) campaign. Polycarbonate microscope slides were exposed in the free air stream outside the NSF/NCAR C-130 using the manual GNI stick. Giant sea-salt aerosol particles are efficiently captured onto the slides. The slides were subsequently stored in desiccated test tubes and transported to NCAR/EOL/RAF. 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 about 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 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. For a detailed description, see a manuscript in preparation by Jensen et al., available from the author.

Data access

This dataset is not currently available online. For more information, please email the primary point of contact.

Additional information

Identifier
Data Quality final
Versions
  • 1.0 (2017-04-20)
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Related projects
Spatial Type textTable
Frequency other
Language English
Categories
Instruments
GCMD Science Keywords Expand keywords
Related links

Temporal coverage

Begin datetime 2008-10-18 13:46:00
End datetime 2008-11-15 19:39:00

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 <eol-datahelp@ucar.edu>

Additional contact information

Citation

Example citation following ESIP guidelines:

Jensen, J. 2017. VOCALS Giant Nuclei Impactor (GNI) NaCl-equivalent Sea-Salt Size Distributions. Version 1.0. UCAR/NCAR - Earth Observing Laboratory. https://doi.org/10.5065/D6CF9NJ8. Accessed 18 Nov 2019.

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