Cloud Condensation Nuclei (CCN) Counter data
https://data.eol.ucar.edu/dataset/220.051

Summary
This dataset contains cumulative data-concentrations per cm3 with critical
supersaturations (Sc) less than the supersaturation (S) value at the top of
the column. Concentrations are normalized to sea level pressure. There are up
to three files per flight. The file labeled both (e.g., JY12both.txt) is the
best—it is a limited data set for time periods when both DRI CCN spectrometers
were sampling ambient and were in agreement with each other over at least an
overlapping supersaturation range, sometimes nearly the entire S range from
0.02% to 1% S, or at least at some S value. The other two files are during
periods when only one instrument sampled ambient aerosol. The new instrument
(e.g., JY12new.txt) is more valid for higher S (>~ 0.1%) whereas the old
instrument is more valid for S <~ 0.1%. NOTE: The old spectrometer on the
first 3 and last 3 flights has been updated. All concentrations were
multiplied by 0.71 for only the old spectrometer for these 6 flights to
correct an error in the original files. For 5 of these 6 there is only data
from the old spectrometer. July 6 is the only one of these with data from both
instruments. All flights have been carefully checked by the data source and
the other 7 flights did not need this correction.

Identifiers
 * Local archive identifier: 220.051
 * doi:10.26023/DWE9-7C9Q-NY0H
   https://doi.org/10.26023/DWE9-7C9Q-NY0H

Versions
  1.0

Citation
 Hudson, J., Hudson, J. 2013. ICE-T: Cloud Condensation Nuclei (CCN) Counter
 data. Version 1.0. UCAR/NCAR - Earth Observing Laboratory.
 https://doi.org/10.26023/DWE9-7C9Q-NY0H Accessed 23 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
 * ICE-T: Ice in Clouds Experiment - Tropical
   https://data.eol.ucar.edu/project/ICE-T

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

Categories
 * Aircraft

Platforms
 * NSF/NCAR C-130

Instruments
 * CCN - Cloud Condensation Nuclei Counter

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

Documentation
 * readmeDRICCNIDET.pdf [15 KiB]
   https://data.eol.ucar.edu/file/download/428F939C9F49/readmeDRICCNIDET.pdf

Related links
 * companion: 220.060: Cloud Condensation Nuclei (CCN) Counter Supplementary Data
   https://data.eol.ucar.edu/dataset/220.060
 * info: ICE-T Missions
   http://catalog.eol.ucar.edu/ice-t/missions/missions.html
 * info: ICE-T Data Policy
   https://www.eol.ucar.edu/content/ice-t-data-policy
 * homepage: EOL ICE-T Project Page
   https://www.eol.ucar.edu/field_projects/ice-t

Temporal coverage
 * Begin datetime: 2011-07-01 00:00:00 
 * End datetime: 2011-07-30 23:59:59 

Spatial coverage
 * Maximum (North) Latitude: 40.00
 * Minimum (South) Latitude: -10.00
 * Minimum (West) Longitude: -90.00
 * Maximum (East) Longitude: -40.00

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

Additional contact information
 * author: James G. Hudson <hudson@dri.edu>
   https://data.eol.ucar.edu/contact/show/155
 * originator: James G. Hudson <hudson@dri.edu>
   https://data.eol.ucar.edu/contact/show/155

Alternate metadata formats
 * DataCite: https://data.eol.ucar.edu/dataset/220.051?format=datacite
 * ISO/TC 211: https://data.eol.ucar.edu/dataset/220.051?format=isotc211