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Titolo:
AN ENCLOSURE TECHNIQUE FOR MEASURING NONMETHANE ORGANIC-COMPOUND EMISSIONS FROM GRASSLANDS
Autore:
FUKUI Y; DOSKEY PV;
Indirizzi:
ARGONNE NATL LAB,DIV ENVIRONM RES,9700 S CASS AVE ARGONNE IL 60439 ARGONNE NATL LAB,DIV ENVIRONM RES ARGONNE IL 60439
Titolo Testata:
Journal of environmental quality
fascicolo: 3, volume: 25, anno: 1996,
pagine: 601 - 610
SICI:
0047-2425(1996)25:3<601:AETFMN>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
HYDROCARBON EMISSIONS; NATURAL HYDROCARBONS; RESPONSE FACTORS; UNITED-STATES; ISOPRENE; OZONE; ATMOSPHERE; MODEL; AIR; VARIABILITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
46
Recensione:
Indirizzi per estratti:
Citazione:
Y. Fukui e P.V. Doskey, "AN ENCLOSURE TECHNIQUE FOR MEASURING NONMETHANE ORGANIC-COMPOUND EMISSIONS FROM GRASSLANDS", Journal of environmental quality, 25(3), 1996, pp. 601-610

Abstract

A static chamber technique for measuring emissions of nonmethane organic compounds (NMOCs) from soil surfaces and herbaceous vegetation in a natural setting has been developed. The technique involves the insertion of a polymethyl methacrylate frame into the ground. A polycarbonate chamber is placed in a water-containing trough on the frame to sealthe chamber to the surface. The soil surface and vegetation are covered for various lengths of time, and samples of the chamber air are passively collected in preevacuated stainless steel canisters. The samples are analyzed in the laboratory by a whole-air cryogenic-preconcentration/high-resolution gas chromatographic technique with flame ionization detection. Changes in the concentrations of the NMOCs with time in the chamber are used to derive emission rates. The technique is sensitive and precise, but the occasional observation of nonlinear changes in NMOC concentrations in the chamber with the length of the covering period limits the accuracy of emission rates derived by this technique. Despite this Limitation, the method is effective for identifying NMOCemissions and investigating seasonal variations of emission rates.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/04/20 alle ore 13:23:49