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Article: Herzberg continuum cross section of oxygen in the wavelength region 193.5-204.0 nm: New laboratory measurements and stratospheric implications

TitleHerzberg continuum cross section of oxygen in the wavelength region 193.5-204.0 nm: New laboratory measurements and stratospheric implications
Authors
Issue Date1984
Citation
Geophysical Research Letters, 1984, v. 11 n. 6, p. 580-582 How to Cite?
AbstractThe absorption cross section of oxygen at 300 K and at pressures in the range 50-760 torr has been measured throughout the wavelength region 193. 5-204. 0 nm with a 6. 65 m scanning spectrometer having an instrumental full width at half maximum of 0. 0013 nm. The absorption features in this region are the discrete lines of some Schumann-Runge bands and two underlying dissociation continua, viz. , the weak Herzberg continuum of oxygen and a pressure dependent continuum involving two molecules of oxygen. At all wavelengths in this region, the values of the Herzberg continuum cross section are smaller than previous laboratory values, much smaller than values used in many photochemical models, and consistent with recent in situ stratospheric values. The acceptance of reduced Herzberg continuum cross sections implies significant changes in photochemical modelling predictions of the stratospheric concentrations and altitude profiles of ozone, chlorofluorocarbons and nitrous oxide.
Persistent Identifierhttp://hdl.handle.net/10722/147744
ISSN
2015 Impact Factor: 4.212
2015 SCImago Journal Rankings: 3.323
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorCheung, ASCen_HK
dc.contributor.authorYoshino, Ken_HK
dc.contributor.authorParkinson, WHen_HK
dc.contributor.authorFreeman, DEen_HK
dc.date.accessioned2012-05-29T06:09:01Z-
dc.date.available2012-05-29T06:09:01Z-
dc.date.issued1984en_HK
dc.identifier.citationGeophysical Research Letters, 1984, v. 11 n. 6, p. 580-582en_HK
dc.identifier.issn0094-8276en_HK
dc.identifier.urihttp://hdl.handle.net/10722/147744-
dc.description.abstractThe absorption cross section of oxygen at 300 K and at pressures in the range 50-760 torr has been measured throughout the wavelength region 193. 5-204. 0 nm with a 6. 65 m scanning spectrometer having an instrumental full width at half maximum of 0. 0013 nm. The absorption features in this region are the discrete lines of some Schumann-Runge bands and two underlying dissociation continua, viz. , the weak Herzberg continuum of oxygen and a pressure dependent continuum involving two molecules of oxygen. At all wavelengths in this region, the values of the Herzberg continuum cross section are smaller than previous laboratory values, much smaller than values used in many photochemical models, and consistent with recent in situ stratospheric values. The acceptance of reduced Herzberg continuum cross sections implies significant changes in photochemical modelling predictions of the stratospheric concentrations and altitude profiles of ozone, chlorofluorocarbons and nitrous oxide.en_HK
dc.languageengen_US
dc.relation.ispartofGeophysical Research Lettersen_HK
dc.titleHerzberg continuum cross section of oxygen in the wavelength region 193.5-204.0 nm: New laboratory measurements and stratospheric implicationsen_HK
dc.typeArticleen_HK
dc.identifier.emailCheung, ASC:hrsccsc@hku.hken_HK
dc.identifier.authorityCheung, ASC=rp00676en_HK
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1029/GL011i006p00580-
dc.identifier.scopuseid_2-s2.0-0021443301en_HK
dc.identifier.volume11en_HK
dc.identifier.issue6en_HK
dc.identifier.spage580en_HK
dc.identifier.epage582en_HK
dc.identifier.isiWOS:A1984SU97000005-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridCheung, ASC=7401806538en_HK
dc.identifier.scopusauthoridYoshino, K=7401650773en_HK
dc.identifier.scopusauthoridParkinson, WH=7006361375en_HK
dc.identifier.scopusauthoridFreeman, DE=23021313300en_HK

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