Study of the Role of a Stratiform Cloud Layer on the Redistribution of Hydrogen Peroxide
Due to its high density of urban and industrial sources, the eastern United States often experiences widespread pollution episodes during the summer (Logan, 1985; Vukovich and Fishman, 1986). The effects of such continental emmissions on the oxiding capacity of atmosphere over the North Atlantic have been studied for many years. Most of the earlier works (Zeller et al., 1977; Kelleher and Feder, 1978; Spicer, 1982) presented evidence for the transport of plumes from the eastern seaboard of the United States out over 100 km or more of the North Atlantic. Measurements at Kejimbuijk National Park in Canada (Brice et al., 1988; Beattie and Wepdale, 1989), begun in 1979, demonstrate transport of these plumes to central Nova Scotia, located at a distance of than 500 km more. The 1993 North Atlantic Regional Experiment (N.A.R.E.) intensive provided further evidences for the transport of anthropogenic pollutants and ozone precussors (CH4, CO,...) from the continent sources out over the Atlantic ocean (Fehsenfeld et al., 1996). We expect that many tropospheric photo-oxidants are generated by chemical reactions, in particular the hydrogen peroxide. This latter presents a real interest for acidification of the clouds and in gas-phase as a efficient source of OH.
KeywordsNova Scotia Inversion Layer Liquid Water Content Cloud Layer Destruction Rate
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