Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
MATHEMATICAL-MODELING OF ATMOSPHERIC FINE PARTICLE-ASSOCIATED PRIMARYORGANIC-COMPOUND CONCENTRATIONS
Autore:
ROGGE WF; HILDEMANN LM; MAZUREK MA; CASS GR; SIMONEIT BRT;
Indirizzi:
CALTECH,DEPT ENVIRONM ENGN SCI PASADENA CA 91125 OREGON STATE UNIV,COLL OCEAN & ATMOSPHER SCI,PETR & ENVIRONM GEOCHEM GRP CORVALLIS OR 97331 CALTECH,DEPT ENVIRONM ENGN SCI PASADENA CA 91125 CALTECH,ENVIRONM QUAL LAB,WM KECK LABS 13878 PASADENA CA 91125
Titolo Testata:
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
fascicolo: D14, volume: 101, anno: 1996,
pagine: 19379 - 19394
Fonte:
ISI
Lingua:
ENG
Soggetto:
POLYCYCLIC AROMATIC-HYDROCARBONS; RESOLUTION GAS-CHROMATOGRAPHY; AIRBORNE PARTICULATE MATTER; WESTERN UNITED-STATES; COAL FLY-ASH; MASS-SPECTROMETRY; LOS-ANGELES; PHOTOCHEMICAL DECOMPOSITION; BIOMASS COMBUSTION; AEROSOL-PARTICLES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
78
Recensione:
Indirizzi per estratti:
Citazione:
W.F. Rogge et al., "MATHEMATICAL-MODELING OF ATMOSPHERIC FINE PARTICLE-ASSOCIATED PRIMARYORGANIC-COMPOUND CONCENTRATIONS", JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 101(D14), 1996, pp. 19379-19394

Abstract

An atmospheric transport model has been used to explore the relationship between source emissions and ambient air quality for individual particle phase organic compounds present in primary aerosol source emissions. An inventory of fine particulate organic compound emissions was assembled for the Los Angeles area in the year 1982. Sources characterized included noncatalyst- and catalyst-equipped autos, diesel trucks,paved road dust, tire wear, brake lining dust, meat cooking operations, industrial oil-fired boilers, roofing tar pots, natural gas combustion in residential homes, cigarette smoke, fireplaces burning oak and pine wood, and plant leaf abrasion products. These primary fine particle source emissions were supplied to a computer-based model that simulates atmospheric transport, dispersion, and dry deposition based on the time series of hourly wind observations and mixing depths. Monthly average fine particle organic compound concentrations that would prevail if the primary organic aerosol were transported without chemical reaction were computed for more than 100 organic compounds within an 80 km x 80 km modeling area centered over Los Angeles. The monthly averagecompound concentrations predicted by the transport model were compared to atmospheric measurements made at monitoring sites within the study area during 1982. The predicted seasonal variation and absolute values of the concentrations of the more stable compounds are found to be in reasonable agreement with the ambient observations. While model predictions for the higher molecular weight polycyclic aromatic hydrocarbons (PAH) are in agreement with ambient observations, lower molecular weight PAH show much higher predicted than measured atmospheric concentrations in the particle phase, indicating atmospheric decay by chemical reactions or evaporation from the particle phase. The atmospheric concentrations of dicarboxylic acids and aromatic polycarboxylic acids greatly exceed the contributions that are due to direct emissions fromprimary sources, confirming that these compounds are principally formed by atmospheric chemical reactions.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/09/20 alle ore 14:46:30