Skip to data content Skip to data search

Time-of-Flight Aerosol Mass Spectrometer 1-Second Data



This dataset contains non-refractory, chemical speciated submicron particulate chemical mass data taken aboard the NSF/NCAR C-130 aircraft (Tail Number N130AR) during the Wintertime Investigation of Transport, Emission, and Reactivity (WINTER) project from 3 February - 13 March 2015. Please see the header portion of the data files for a list of parameters measured.

Data access

  • ORDER data for delivery by FTP

Additional information

Data Quality final
  • 0.1 (2015-03-17)
  • 1.0 (2016-01-15)
  • 2.0 (2016-12-22):

    For this new version of the 1s HR-ToF-AMS data, changes are small, ~1-2% lower for all species, but are higher for chloride (~20% lower). In detail:

    1. Corrections were made to account for 2 recently discovered vaporizer effects; a) correction for a small positive bias on CO2+ from NH4NO3, resulting in a ~1-2% change in concentrations (see Pieber et al., ES&T, 2016 DOI: 10.1021/acs.est.6b01035 for specific details), and b) an overestimation of the chloride concentration from a similar effect that was recently discovered by our group (Hu et al., AS&T, submitted). We can provide more details if interested.
    2. In addition to these corrections, the collection efficiency (CE) we typically use is from our 1 minute data product, to reduce noise. However, CE is dependent on particle acidity, and since we frequently sampled power plant plumes during WINTER, I incorporated the use of CE from our 1 second data product to capture the rapidly changing particle acidity within the short sampling times of power plant plumes. This should improve analyses of changes in species concentrations as we cross such plumes.

  • 3.0 (2018-05-14):

    This version is the final data. Users are strongly encouraged to contact PI for proper data use.  A smoothing error in the CE correction from previous version that resulted in several points being erroneously removed was fixed.

(Only the current version of the data is available to order. If you have questions about a prior version, please email us.)
Subscribe Subscribe to receive email when new or updated data is available.
Related projects
Spatial Type point
Frequency 1 second
Language English
GCMD Science Keywords Expand keywords
Related links

Temporal coverage

Begin datetime 2015-02-03 00:00:00
End datetime 2015-03-13 23:59:59

Spatial coverage

Map data from IBCSO, IBCAO, and Global Topography.

Maximum (North) Latitude: 48.00, Minimum (South) Latitude: 32.00
Minimum (West) Longitude: -86.00, Maximum (East) Longitude: -65.00

Primary point of contact information

EOL Data Support <>

Additional contact information


Jimenez, J. 2018. Time-of-Flight Aerosol Mass Spectrometer 1-Second Data. Version 3.0. UCAR/NCAR - Earth Observing Laboratory. Accessed 13 Jun 2024.

Today's date is shown: please replace with the date of your most recent access.

Additional citation styles

The citation text below is from the DataCite Content Resolver service and may take a few seconds to load. The styles and locales are obtained from CrossCite, which also provides a citation formatter. See ReFindit for another alternative. Formatting is not perfect: please verify and edit before use. Today's date is shown: please replace with the date of your most recent access.

Style: Locale:

Ancillary information

Metadata download

Note that your browser may not display the above metadata links, but automatically save them as files in a folder such as "Downloads"