Airship Measurements of Hydrogen Peroxide and Related Parameters in the Marine Atmosphere Along the Western U.S. Coast
✍ Scribed by Zhang Genfa; Purnendu K. Dasgupta; Glenn M. Frick; William A. Hoppel
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 270 KB
- Volume
- 62
- Category
- Article
- ISSN
- 0026-265X
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✦ Synopsis
Hydrogen peroxide remains a key species of interest, in both the polluted and the unpolluted atmosphere. While many studies exist, the vertical distribution of H 2 O 2 in the marine atmosphere has never been reported. This paper reports data for gaseous H 2 O 2 , O 3 , and SO 2 and meteorological parameters measured from an airship along the Oregon and Northern California coast during June 1-28, 1994. Daytime H 2 O 2 levels ranged from 0.064 to 0.505 ppbv, with the mean value being 0.175 Ϯ 0.077 ppbv. Typically, H 2 O 2 levels generally increase with increasing O 3 , temperature, flight altitude, and UV flux. Conversely, a strong negative correlation with relative humidity is observed. Negative correlations with SO 2 are also observed if significant concentrations are present, as in plumes. However, in a fresh plume from a fossil fuel-burning ship, nonzero H 2 O 2 concentrations persist. The vertical profile of H 2 O 2 shows 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.