http://www.cnr.it/ontology/cnr/individuo/prodotto/ID13040
Small HONO Emissions From Snow Surfaces at Browning Pass, Antarctica (Articolo in rivista)
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- Small HONO Emissions From Snow Surfaces at Browning Pass, Antarctica (Articolo in rivista) (literal)
- Anno
- 2006-01-01T00:00:00+01:00 (literal)
- Alternative label
J. Beine, A. Amoroso, F. Dominé, M.D. King, M. Nardino, A. Ianniello, J.L. France (2006)
Small HONO Emissions From Snow Surfaces at Browning Pass, Antarctica
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- J. Beine, A. Amoroso, F. Dominé, M.D. King, M. Nardino, A. Ianniello, J.L. France (literal)
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- ISI Web of Science (WOS) (literal)
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- C.N.R. IIA, Roma, Italy
CNRS - LGGE, Grenoble, France
Department of Geology, Royal Holloway University of London, Egham, Surrey, United Kingdom
C.N.R. IBIMET, Sezione di Bologna, Italy
(literal)
- Titolo
- Small HONO Emissions From Snow Surfaces at Browning Pass, Antarctica (literal)
- Abstract
- Measured Fluxes of nitrous acid at Browning Pass, Antarctica were very low, despite conditions that are generally understood as favorable for HONO emissions, including: acidic snow surfaces, an abundance of NO3- anions in the snow surface, and abundant UV light for NO3- photolysis. Photochemical modeling suggests noon time HONO fluxes of 5 10 nmol m-2 h-1; the measured fluxes, however, were close to zero throughout the campaign. The analysis of soluble mineral ions in snow reveals that the NO3- ion is probably present in aged snows as NaNO3. This is peculiar to our study site, and we suggest that this may affect the photochemical reactivity of NO3-, by preventing the release of products, or providing a reactive medium for newly formed HONO. In fresh snow, the NO3- ion is probably present as dissolved or adsorbed HNO3 and yet, no HONO emissions were observed. We speculate that HONO formation from NO3- photolysis may involve electron transfer reactions of NO2 from photosensitized organics and that fresh snows at our site had insufficient concentrations of adequate organic compounds to favor this reaction. (literal)
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