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VOCALS Giant Cloud Condensation Nuclei (CCN) Impactor Data

Summary

The NCAR/EOL/RAF Giant Cloud Condensation Nuclei Impactor (GNI) samples giant aerosol particles. This data set was acquired during the VOCALS 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.

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

Data access

ORDER data for delivery by FTP

Additional information

Identifier	DOI: https://doi.org/10.5065/D6NZ862W
Data Quality	final
Versions	1.0 (2016-09-29)
Subscribe	Subscribe to receive email when new or updated data is available.
Related projects	VOCALS: VAMOS Ocean-Cloud-Atmosphere-Land Study
Spatial Type	raster
Frequency	no set schedule
Language	English
Categories	Aircraft
Platforms	NSF/NCAR C-130
Instruments	Giant Nuclei Impactor - GNI
GCMD Science Keywords	CLOUD CONDENSATION NUCLEI CLOUD CONDENSATION NUCLEI Expand keywords
Related links	companion: 89.177: Giant Cloud Condensation Nuclei (CCN) Impactor Raw Data info: VOCALS Missions

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

principalInvestigator(DataCollector): Jorgen Jensen <jbj@ucar.edu>

Citation

Example citation following ESIP guidelines:

Jensen, J. 2016. VOCALS Giant Cloud Condensation Nuclei (CCN) Impactor Data. Version 1.0. UCAR/NCAR - Earth Observing Laboratory. https://doi.org/10.5065/D6NZ862W. Accessed 05 Jun 2023.

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