Estimation of the molecular hydrogen soil uptake and traffic emissions at a suburban site near Paris through hydrogen, carbon monoxide, and radon-222 semicontinuous measurements.

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dc.contributor.authorYver, Cen_AU
dc.contributor.authorSchmidt, Men_AU
dc.contributor.authorBousquet, Pen_AU
dc.contributor.authorZahorowski, Wen_AU
dc.contributor.authorRamonet, Men_AU
dc.date.accessioned2010-04-09T02:16:01Zen_AU
dc.date.accessioned2010-04-30T05:03:47Zen_AU
dc.date.available2010-04-09T02:16:01Zen_AU
dc.date.available2010-04-30T05:03:47Zen_AU
dc.date.issued2009-09-23en_AU
dc.date.statistics2009-09-23en_AU
dc.description.abstractSince June 2006, simultaneous semicontinuous measurements of tropospheric molecular hydrogen (H2), carbon monoxide (CO), and radon-222 (222Rn) have been performed at Gif-sur-Yvette (Paris region), a suburban atmospheric measurement site in France. Molecular hydrogen mixing ratios range from 500 to 1000 ppb, CO mixing ratios vary from 100 to 1400 ppb, and 222Rn concentrations fluctuate from 0 to 20 Bq m−3. The H2 seasonal cycle shows the expected pattern for the Northern Hemisphere with a maximum in spring and a minimum in autumn. We inferred a mean baseline value of 533 ppb with a peak-to-peak amplitude of 30 ppb. Carbon monoxide exhibits a seasonal cycle with a maximum in winter and a minimum in summer. The mean baseline value reaches 132 ppb with a peak-to-peak amplitude of 40 ppb. Radon-222 presents weak seasonal variations with a maximum in autumn/winter and a minimum in spring/summer. The diurnal cycles of H2 and CO are dominated by emissions from nearby traffic with two peaks during morning and evening rush hours. The typical H2/CO emission ratio from traffic is found to be 0.47 ± 0.08 on a molar basis (ppb/ppb). The radon tracer method is applied to nighttime H2 observations to estimate the H2 soil uptake of the nocturnal catchment area of our sampling site. The influences from nocturnal local anthropogenic combustion sources are estimated by parallel measurements of CO at 0.14 × 10−5 g(H2) m−2 h−1. The mean inferred dry deposition velocity is 0.024 ± 0.013 cm s−1 with a seasonal amplitude of 40% at Gif-sur-Yvette. © 2009, American Geophysical Unionen_AU
dc.identifier.articlenumberD18304en_AU
dc.identifier.citationYver, C., Schmidt, M., Bousquet, P., Zahorowski, W., & Ramonet, M. (2009). Estimation of the molecular hydrogen soil uptake and traffic emissions at a suburban site near Paris through hydrogen, carbon monoxide, and radon-222 semicontinuous measurements. Journal of Geophysical Research: Atmospheres, 114, 12. doi:10.1029/2009JD012122en_AU
dc.identifier.govdoc1246en_AU
dc.identifier.issn0148-0227en_AU
dc.identifier.issueD18en_AU
dc.identifier.journaltitleJournal of Geophysical Research: Atmospheresen_AU
dc.identifier.pagination12en_AU
dc.identifier.urihttp://dx.doi.org/10.1029/2009JD012122en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3137en_AU
dc.identifier.volume114en_AU
dc.language.isoenen_AU
dc.publisherAmerican Geophysical Unionen_AU
dc.subjectFranceen_AU
dc.subjectRadon 222en_AU
dc.subjectHydrogenen_AU
dc.subjectCarbon monoxideen_AU
dc.subjectSoilsen_AU
dc.subjectUptakeen_AU
dc.titleEstimation of the molecular hydrogen soil uptake and traffic emissions at a suburban site near Paris through hydrogen, carbon monoxide, and radon-222 semicontinuous measurements.en_AU
dc.typeJournal Articleen_AU
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