NCAR/NSF C-130 Chemistry Peroxides Data

The gas phase peroxide data reported herein were obtained using the method described in Lee et al., J. Atmos. Ocean. Tech., 1995, flown on board the NCAR C-130 platform during the RICO, Rain in Cumulus over the Ocean, experiment between December 3, 2004, and January 27, 2005, based out of Antigua. Hydrogen peroxide is symbolically represented by H2O2. Methylhydroperoxide is symbolically given by CH3OOH. The measurements are given as molecular mixing ratios; molecules of specific gas per molecules of whole air times 1,000,000,000,000. or ppt-v. The partial pressure of a specific gas can be calculated by: P(H2O2) = MixingRatio(pptv) * P(air) /1,000,000,000,000. The goal of RICO was a detailed understanding of rain formation in shallow "warm" cumulus clouds over the ocean. Objectives included following the number density distributions and chemical evolution of aerosol, cloud condensation nuclei, cloud droplets, and precipitation. Sulfur gas and partcile chemistry leading to sulfate was consider a key process and the measurements of peroxides are directly related to particulate sulfate formation. Updated on 2006/01/03 with revised data files:

  • correct lag time errors in CVI to air_sample changes in sample mode (and vice versa).

  • Remove H2O2 data during noted periods of inlet condensation; primarily during initial decent after 1st high altitude circle at 5km and 1/2 way through first lower altitude circle.

  • Corrected limit of detection of methylhydroperoxide (15 -> 30 ppt) and its estimated uncertainty

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Temporal Range

  • Begin:  2004-12-03T00:00:00Z
    End:  2005-01-27T23:59:59Z

Keywords

Resource Type dataset
Temporal Range Begin 2004-12-03T00:00:00Z
Temporal Range End 2005-01-27T23:59:59Z
Temporal Resolution N/A
Bounding Box North Lat 21.00000
Bounding Box South Lat 15.00000
Bounding Box West Long -72.00000
Bounding Box East Long -55.00000
Spatial Representation N/A
Spatial Resolution N/A
Related Links

Documentation #1 : URI_peroxides_readme.txt
Additional Information N/A
Resource Format ASCII: ASCII Text (text/plain)
Standardized Resource Format ASCII
Asset Size 1 MB
Legal Constraints

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Access Constraints none
Software Implementation Language N/A

Resource Support Name EOL Data Support
Resource Support Email datahelp@eol.ucar.edu
Resource Support Organization UCAR/NCAR - Earth Observing Laboratory
Distributor UCAR/NCAR - Earth Observing Laboratory
Metadata Contact Name EOL Data Support
Metadata Contact Email datahelp@eol.ucar.edu
Metadata Contact Organization UCAR/NCAR - Earth Observing Laboratory

Author Brian Heikes
Publisher UCAR/NCAR - Earth Observing Laboratory
Publication Date 2006-01-03T09:45:09
Digital Object Identifier (DOI) https://doi.org/10.26023/HKAK-11RZ-YE10
Alternate Identifier 87.007
Resource Version 1.0
Topic Category climatologyMeteorologyAtmosphere
Progress completed
Metadata Date 2024-12-26T23:52:59Z
Metadata Record Identifier edu.ucar.eol::87.007
Metadata Language eng; USA
Suggested Citation Brian Heikes. (2006). NCAR/NSF C-130 Chemistry Peroxides Data. 1.0. UCAR/NCAR - Earth Observing Laboratory. https://doi.org/10.26023/HKAK-11RZ-YE10. Accessed 06 February 2025.

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