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Titolo:
Ozone production efficiency in Savanna and forested areas during the EXPRESSO experiment
Autore:
Marion, T; Perros, PE; Losno, R; Steiner, E;
Indirizzi:
Univ Paris 07, LISA, Creteil, France Univ Paris 07 Creteil FranceUniv Paris 07, LISA, Creteil, France Univ Paris 12, Creteil, France Univ Paris 12 Creteil FranceUniv Paris 12, Creteil, France
Titolo Testata:
JOURNAL OF ATMOSPHERIC CHEMISTRY
fascicolo: 1, volume: 38, anno: 2001,
pagine: 3 - 30
SICI:
0167-7764(200101)38:1<3:OPEISA>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOUTHEASTERN UNITED-STATES; NITRIC-OXIDE; TROPOSPHERIC OZONE; ATMOSPHERIC CHEMISTRY; NITROGEN-DIOXIDE; CARBON-MONOXIDE; TROPICAL FOREST; SOIL EMISSIONS; REGIONAL OZONE; RURAL OZONE;
Keywords:
ozone production efficiency; EXPRESSO; biomass burning; savanna; rain forest;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Physical, Chemical & Earth Sciences
Citazioni:
52
Recensione:
Indirizzi per estratti:
Indirizzo: Marion, T Univ Paris 07, LISA, Creteil, France Univ Paris 07 Creteil France Paris 07, LISA, Creteil, France
Citazione:
T. Marion et al., "Ozone production efficiency in Savanna and forested areas during the EXPRESSO experiment", J ATMOS CH, 38(1), 2001, pp. 3-30

Abstract

NO, NOx, NOy and O-3 have been measured during the airborne EXPRESSO experiment, November 96, which took place near Bangui (Central Africa) at the beginning of the dry season. This period corresponds to an intense burning activity. Chemical and photochemical characteristics of the planetary boundary layer, which corresponds most of the time to the monsoon layer, and the Harmattan layer, which is situated above the latter, have been studied for savanna as well as rain forest areas. These two layers are very different when considering the chemical composition (especially for ozone and NOz) and the photochemical age. The relationship of photochemical ozone production versus photochemical NOx oxidation products has been investigated. Results indicate an ozone production efficiency (OPE) ranging from 6.3 to 14.8 in the planetary boundary layer. Thus, this layer is characteristic of a photochemically young and active air mass. In this layer, the ozone potential production increases with the air mass photochemical age. On the other hand, the Harmattan layer shows an OPE ranging from 4.6 to 7.4. These values are characteristic of photochemically well-aged air masses. In this layer, the ozone potential production seems to be exhausted with values around 4.0 (i.e., 4 ozone molecules produced for each NOx molecule emitted).

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/04/20 alle ore 07:23:52