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Desert Research Institute (DRI) cloud condensation nuclei (CCN) spectra



The DRI CCN (Hudson 1989) data (ASCE) provides number concentrations per centimeter cubed normalized to surface pressure; i.e., these are mixing ratios. Data are recorded with a time stamp in each row. Time differences between adjacent rows are approximately equal to the integrated time of each measurement. Data gaps are denoted by blank lines. Data gaps are caused by calibrations, cloud penetrations, or malfunctions. All data is contained in ASCII text files. Documentation is in MSWORD .doc format.

Data access

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Additional information

Data Quality final
  • 1.0 (2008-10-15)
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Related projects
Spatial Type multiple
Frequency < 1 minute
Language English
GCMD Science Keywords Expand keywords
Related links

Temporal coverage

Begin datetime 2007-08-04 20:28:00
End datetime 2007-09-07 02:15:59

Spatial coverage

Map data from IBCSO, IBCAO, and Global Topography.

Maximum (North) Latitude: 10.00, Minimum (South) Latitude: -10.00
Minimum (West) Longitude: -165.00, Maximum (East) Longitude: -150.00

Primary point of contact information

EOL Data Support <>

Additional contact information


Hudson, J. 2008. Desert Research Institute (DRI) cloud condensation nuclei (CCN) spectra. Version 1.0. UCAR/NCAR - Earth Observing Laboratory. Accessed 16 Jun 2024.

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Ancillary information

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