Airship Measurements of Hydrogen Peroxide and Related Parameters in the Marine Atmosphere Along the Western U.S. Coast

Hydrogen peroxide remains a key species of interest, in both the polluted and the unpolluted atmosphere. While many studies exist, the vertical distribution of H2O2in the marine atmosphere has never been reported. This paper reports data for gaseous H2O2, O3, and SO2and meteorological parameters mea...

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Bibliographic Details
Published in:Microchemical journal 1999-05, Vol.62 (1), p.99-113
Main Authors: Genfa, Zhang, Dasgupta, Purnendu K., Frick, Glenn M., Hoppel, William A.
Format: Article
Language:English
Subjects:
Analysis methods
Applied sciences
Atmospheric pollution
Exact sciences and technology
Pollution
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Summary:Hydrogen peroxide remains a key species of interest, in both the polluted and the unpolluted atmosphere. While many studies exist, the vertical distribution of H2O2in the marine atmosphere has never been reported. This paper reports data for gaseous H2O2, O3, and SO2and meteorological parameters measured from an airship along the Oregon and Northern California coast during June 1–28, 1994. Daytime H2O2levels ranged from 0.064 to 0.505 ppbv, with the mean value being 0.175 ± 0.077 ppbv. Typically, H2O2levels generally increase with increasing O3, temperature, flight altitude, and UV flux. Conversely, a strong negative correlation with relative humidity is observed. Negative correlations with SO2are also observed if significant concentrations are present, as in plumes. However, in a fresh plume from a fossil fuel-burning ship, nonzero H2O2concentrations persist. The vertical profile of H2O2shows a maximum that generally occurs above the top of the marine boundary layer, at an altitude up to 200–300 m above the top of the marine boundary layer.
ISSN:0026-265X
1095-9149
DOI:10.1006/mchj.1999.1715