Data · dataset · 2026
Cloud Condensation Nuclei (CCN) Counter data
Listed in National Center for Atmospheric Research
This dataset contains cumulative data-concentrations per cm3 with critical supersaturations (Sc) less than the supersaturation (S) value at the top of the column.
Description
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%.
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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.
Links
Get the data
- Resource Homepage doi.org/10.26023/dwe9-7c9q-ny0h ↗
download · DOI / persistent id · from data ucar edu
Where it is published
- data.ucar.edu /dataset/cloud-condensation-nuclei-ccn-counter-data ↗
National Center for Atmospheric Research dataset page
landing page · from data ucar edu
Catalogue records · 1
- CKAN API data.ucar.edu/api/3/action/package_show?id=150b5f56-d93a-4f31-8ad6-5671cf15b… ↗
metadata API · from data ucar edu
Topics
- From keywords
- Earth & Environmental Science · Ocean & Atmospheric Science · Physics
- Inferred from text
- Atmospheric sciences 72%
Provenance · 1 source records, 9 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| National Center for Atmospheric Research | 150b5f56-d93a-4f31-8ad6-5671cf15be31 | 11 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| concepts[field].anzsrc:group:3701 | enrichment · data ucar edu | taxonomy-embedding@1.1.0 | title+keywords+description (72%) |
| concepts[field].local:field:earth-environmental | mapping · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| concepts[field].local:field:ocean-atmospheric | mapping · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| concepts[field].local:field:physics | mapping · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| created_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| description | source · data ucar edu | connector:data_ucar_edu@1.0.0 | /notes |
| publication_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| title | source · data ucar edu | connector:data_ucar_edu@1.0.0 | /title |
| updated_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 |