Carbon monoxide isotopic measurements in Indianapolis constrain urban source isotopic signatures and support mobile fossil fuel emissions as the dominant wintertime CO source
We present measurements of CO mole fraction and CO stable isotopes (δ13CO and δC18O) in air during the winters of 2013–14 and 2014–15 at tall tower sampling sites in and around Indianapolis, USA. A tower located upwind of the city was used to quantitatively remove the background CO signal, allowing...
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| Format: | Article |
| Language: | English |
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BioOne
2017-11-01
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| Series: | Elementa: Science of the Anthropocene |
| Subjects: | |
| Online Access: | https://www.elementascience.org/articles/136 |
| _version_ | 1819241534078320640 |
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| author | Isaac J. Vimont Jocelyn C. Turnbull Vasilii V. Petrenko Philip F. Place Anna Karion Natasha L. Miles Scott J. Richardson Kevin Gurney Risa Patarasuk Colm Sweeney Bruce Vaughn James W.C. White |
| author_facet | Isaac J. Vimont Jocelyn C. Turnbull Vasilii V. Petrenko Philip F. Place Anna Karion Natasha L. Miles Scott J. Richardson Kevin Gurney Risa Patarasuk Colm Sweeney Bruce Vaughn James W.C. White |
| author_sort | Isaac J. Vimont |
| collection | DOAJ |
| description | We present measurements of CO mole fraction and CO stable isotopes (δ13CO and δC18O) in air during the winters of 2013–14 and 2014–15 at tall tower sampling sites in and around Indianapolis, USA. A tower located upwind of the city was used to quantitatively remove the background CO signal, allowing for the first unambiguous isotopic characterization of the urban CO source and yielding 13CO of –27.7 ± 0.5‰ VPDB and C18O of 17.7 ± 1.1‰ VSMOW for this source. We use the tower isotope measurements, results from a limited traffic study, as well as atmospheric reaction rates to examine contributions from different sources to the Indianapolis CO budget. Our results are consistent with earlier findings that traffic emissions are the dominant source, suggesting a contribution of 96% or more to the overall Indianapolis wintertime CO emissions. Our results are also consistent with the hypothesis that emissions from a small fraction of vehicles without functional catalytic systems dominate the Indianapolis CO budget. |
| first_indexed | 2024-12-23T14:25:26Z |
| format | Article |
| id | doaj.art-ba3c38f2f128481a90e4ab08b23be8ed |
| institution | Directory Open Access Journal |
| issn | 2325-1026 |
| language | English |
| last_indexed | 2024-12-23T14:25:26Z |
| publishDate | 2017-11-01 |
| publisher | BioOne |
| record_format | Article |
| series | Elementa: Science of the Anthropocene |
| spelling | doaj.art-ba3c38f2f128481a90e4ab08b23be8ed2022-12-21T17:43:41ZengBioOneElementa: Science of the Anthropocene2325-10262017-11-01510.1525/elementa.136205Carbon monoxide isotopic measurements in Indianapolis constrain urban source isotopic signatures and support mobile fossil fuel emissions as the dominant wintertime CO sourceIsaac J. Vimont0Jocelyn C. Turnbull1Vasilii V. Petrenko2Philip F. Place3Anna Karion4Natasha L. Miles5Scott J. Richardson6Kevin Gurney7Risa Patarasuk8Colm Sweeney9Bruce Vaughn10James W.C. White11University of Colorado, INSTAAR, Boulder, ColoradoGNS Science, Lower Hutt, NZ; and University of Colorado, CIRIES, Boulder, Colorado, USDepartment of Earth and Environmental Sciences, University of Rochester, Rochester, NYDepartment of Earth and Environmental Sciences, University of Rochester, Rochester, NYUniversity of Colorado, CIRIES; National Oceanic and Atmospheric Administration, Boulder, Colorado; and National Institute of Standards and Technology, Gaithersberg, MDPennsylvania State University, College Station, PAPennsylvania State University, College Station, PAArizona State University, Tempe, AZArizona State University, Tempe, AZUniversity of Colorado, CIRIES; and National Oceanic and Atmospheric Administration, Boulder, CO,University of Colorado, INSTAAR, Boulder, ColoradoUniversity of Colorado, INSTAAR, Boulder, ColoradoWe present measurements of CO mole fraction and CO stable isotopes (δ13CO and δC18O) in air during the winters of 2013–14 and 2014–15 at tall tower sampling sites in and around Indianapolis, USA. A tower located upwind of the city was used to quantitatively remove the background CO signal, allowing for the first unambiguous isotopic characterization of the urban CO source and yielding 13CO of –27.7 ± 0.5‰ VPDB and C18O of 17.7 ± 1.1‰ VSMOW for this source. We use the tower isotope measurements, results from a limited traffic study, as well as atmospheric reaction rates to examine contributions from different sources to the Indianapolis CO budget. Our results are consistent with earlier findings that traffic emissions are the dominant source, suggesting a contribution of 96% or more to the overall Indianapolis wintertime CO emissions. Our results are also consistent with the hypothesis that emissions from a small fraction of vehicles without functional catalytic systems dominate the Indianapolis CO budget.https://www.elementascience.org/articles/136Carbon MonoxideIsotopesUrban |
| spellingShingle | Isaac J. Vimont Jocelyn C. Turnbull Vasilii V. Petrenko Philip F. Place Anna Karion Natasha L. Miles Scott J. Richardson Kevin Gurney Risa Patarasuk Colm Sweeney Bruce Vaughn James W.C. White Carbon monoxide isotopic measurements in Indianapolis constrain urban source isotopic signatures and support mobile fossil fuel emissions as the dominant wintertime CO source Elementa: Science of the Anthropocene Carbon Monoxide Isotopes Urban |
| title | Carbon monoxide isotopic measurements in Indianapolis constrain urban source isotopic signatures and support mobile fossil fuel emissions as the dominant wintertime CO source |
| title_full | Carbon monoxide isotopic measurements in Indianapolis constrain urban source isotopic signatures and support mobile fossil fuel emissions as the dominant wintertime CO source |
| title_fullStr | Carbon monoxide isotopic measurements in Indianapolis constrain urban source isotopic signatures and support mobile fossil fuel emissions as the dominant wintertime CO source |
| title_full_unstemmed | Carbon monoxide isotopic measurements in Indianapolis constrain urban source isotopic signatures and support mobile fossil fuel emissions as the dominant wintertime CO source |
| title_short | Carbon monoxide isotopic measurements in Indianapolis constrain urban source isotopic signatures and support mobile fossil fuel emissions as the dominant wintertime CO source |
| title_sort | carbon monoxide isotopic measurements in indianapolis constrain urban source isotopic signatures and support mobile fossil fuel emissions as the dominant wintertime co source |
| topic | Carbon Monoxide Isotopes Urban |
| url | https://www.elementascience.org/articles/136 |
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