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Titolo:
A SIMPLE SCHEME FOR PARTITIONING AIRCRAFT-MEASURED OZONE FLUXES INTO SURFACE-UPTAKE AND CHEMICAL TRANSFORMATION
Autore:
GUO Y; DESJARDINS RL; MACPHERSON JI; SCHUEPP PH;
Indirizzi:
AGR CANADA,CTR LAND & BIOL RESOURCES RES,BLDG 74 OTTAWA ON K1A 0C6 CANADA NATL RES COUNCIL CANADA,INST AEROSP RES OTTAWA ON K1A 0C6 CANADA MCGILL UNIV,DEPT NAT RESOURCE SCI ST ANNE BELLEVUE PQ H9X 3V9 CANADA
Titolo Testata:
Atmospheric environment
fascicolo: 21, volume: 29, anno: 1995,
pagine: 3199 - 3207
SICI:
1352-2310(1995)29:21<3199:ASSFPA>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
DRY TROPICAL FOREST; NITRIC-OXIDE; BOUNDARY-LAYER; FIELD-MEASUREMENTS; SOIL EMISSIONS; NITROUS-OXIDE; TRACE GASES; NO; DEPOSITION; CHEMISTRY;
Keywords:
TROPOSPHERIC OZONE; ATMOSPHERIC CHEMISTRY; OZONE DEPOSITION; OZONE FORMATION AND DESTRUCTION; OZONE FLUX PARTITIONING; AIRCRAFT MEASUREMENTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
41
Recensione:
Indirizzi per estratti:
Citazione:
Y. Guo et al., "A SIMPLE SCHEME FOR PARTITIONING AIRCRAFT-MEASURED OZONE FLUXES INTO SURFACE-UPTAKE AND CHEMICAL TRANSFORMATION", Atmospheric environment, 29(21), 1995, pp. 3199-3207

Abstract

The interplay between surface uptake and atmospheric chemistry makes aircraft-measured ozone fluxes near the surface complex to interpret over such surfaces as recently, cultivated bare soil, newly cut hay, cities and near highways in the San Joaquin Valley of California (the California Ozone Deposition Experiment, 1991). In this study, a simple partitioning scheme is proposed, based on the estimation of the ozone surface-uptake rate by a regressional fit of ozone flux vs latent heat flux and a vegetation index, over well-irrigated vegetative surfaces, by assuming that ozone flux residuals are due to atmospheric chemistry. The contributions to ozone fluxes by atmospheric chemistry over surfaces other than well-irrigated vegetative surfaces can then be estimated from the difference between the estimated ozone surface-uptake rateand the measured ozone flux. The estimates indicate that chemical contributions are more significant than surface-uptake and that the chemical contributions are dominated primarily by ozone destruction over recently cultivated bare soil, newly cut hay, city and near highway. Thedominant sink for ozone destruction is analytically shown to be caused by NO concentrations in excess of the photostationary state,which are believed to be linked to the strong NO emissions from the surfaces.

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Documento generato il 05/04/20 alle ore 12:28:50