Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
INTERCOMPARISON OF TROPOSPHERIC OH AND ANCILLARY TRACE GAS MEASUREMENTS AT FRITZ-PEAK-OBSERVATORY, COLORADO
Autore:
EISELE FL; MOUNT GH; FEHSENFELD FC; HARDER J; MAROVICH E; PARRISH DD; ROBERTS J; TRAINER M;
Indirizzi:
GEORGIA INST TECHNOL ATLANTA GA 30332 NATL CTR ATMOSPHER RES BOULDER CO 80307 NOAA,AERON LAB BOULDER CO 80303 UNIV COLORADO,COOPERAT INST RES ENVIRONM SCI BOULDER CO 80309
Titolo Testata:
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
fascicolo: D9, volume: 99, anno: 1994,
pagine: 18605 - 18626
Fonte:
ISI
Lingua:
ENG
Soggetto:
LONG-PATH ABSORPTION; ODD-NITROGEN NOY; NIWOT-RIDGE; RURAL TROPOSPHERE; NATURAL HYDROCARBONS; OZONE; AIR; ATMOSPHERE; ISOPRENE; EMISSION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
38
Recensione:
Indirizzi per estratti:
Citazione:
F.L. Eisele et al., "INTERCOMPARISON OF TROPOSPHERIC OH AND ANCILLARY TRACE GAS MEASUREMENTS AT FRITZ-PEAK-OBSERVATORY, COLORADO", JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 99(D9), 1994, pp. 18605-18626

Abstract

The determination of the concentration of OH in the Earth's troposphere is of fundamental importance to an understanding of the chemistry of the lower atmosphere. Although many experiments to measure OH concentration have been performed in recent years, very few operate at sensitivities necessary to measure the extremely low amount of OH in the clean troposphere (0.1-0.2 parts per trillion by volume at summertime local noon). This paper describes an informal intercomparison campaign held at Fritz Peak, Colorado, in summer 1991 to intercompare the OH concentrations determined from a spectroscopic instrument and an in situ chemical conversion instrument, both with sensitivities at or below 5 x 10(5) molecules cm(-3) Ancillary measurements including those of O-3, CO, NO, NO2, NOy, H2O, SO2, aerosols, solar flux, and meteorologicalparameters were also performed to test photochemical theories of OH formation. These measurements also provided a means for comparing air masses at the long path and in situ sites. The intercomparison was verysuccessful with measured values of OH concentration in agreement within one standard error much of the time. OH concentrations were typically low, rarely above 4 x 10(6) cm(-3), with only slow growth during the morning hours, indicating the possible presence of scavenger species. Model results suggest higher than measured OH concentrations or the presence of scavenger species.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 06:46:57