Identification

Title

Cloud Condensation Nuclei (CCN) Counter data

Alternative title(s)

220.051

Abstract

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.

Resource type

dataset

Resource locator

https://data.eol.ucar.edu//dataset/220.051

protocol: https

description: Dataset homepage

https://data.eol.ucar.edu/cgi-bin/codiac/fgr_form/id=220.051

protocol: https

description: Dataset order request form. Data files are made available via FTP.

function: order

Unique resource identifier

code

220.051

codeSpace

Dataset language

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

climatologyMeteorologyAtmosphere

Keywords

Keyword set

keyword value

dataset

originating controlled vocabulary

title

Resource Type

reference date

date type

revision

effective date

2014-10-16

Keyword set

keyword value

NSF/NCAR C-130

Keyword set

keyword value

Aircraft

Keyword set

keyword value

EARTH SCIENCE > ATMOSPHERE > CLOUDS > CLOUD MICROPHYSICS > CLOUD CONDENSATION NUCLEI

EARTH SCIENCE > ATMOSPHERE > AEROSOLS > AEROSOL PARTICLE PROPERTIES

EARTH SCIENCE > ATMOSPHERE > AEROSOLS > CLOUD CONDENSATION NUCLEI

originating controlled vocabulary

title

Global Change Master Directory (GCMD)

reference date

date type

revision

effective date

2018-02-27

Geographic location

West bounding longitude

-90.00000

East bounding longitude

-40.00000

North bounding latitude

40.00000

South bounding latitude

-10.00000

Temporal reference

Temporal extent

Begin position

2011-07-01T00:00:00Z

End position

2011-07-30T23:59:59Z

Dataset reference date

date type

publication

effective date

2013-04-05T19:46:25Z

Frequency of update

Quality and validity

Lineage

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

none

Limitations on public access

none

Responsible organisations

Responsible party

contact position

EOL Data Support

organisation name

UCAR/NCAR - Earth Observing Laboratory

full postal address

PO Box 3000

Boulder

80307-3000

email address

datahelp@eol.ucar.edu

web address

https://data.eol.ucar.edu/

responsible party role

pointOfContact

Responsible party

contact position

EOL Data Support

organisation name

UCAR/NCAR - Earth Observing Laboratory

full postal address

PO Box 3000

Boulder

80307-3000

email address

datahelp@eol.ucar.edu

web address

https://data.eol.ucar.edu/

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact

contact position

EOL Data Support

organisation name

UCAR/NCAR - Earth Observing Laboratory

full postal address

PO Box 3000

Boulder

80307-3000

email address

datahelp@eol.ucar.edu

web address

https://data.eol.ucar.edu/

responsible party role

pointOfContact

Metadata date

2024-02-07T22:42:05Z

Metadata language

eng; USA