ff and CO to identify emission sources at different site types in Auckland, New Zealand

Young, Hayden A.; Turnbull, Jocelyn C.; Keller, Elizabeth D.; Domingues, Lucas Gatti; Parry-Thompson, Jeremy; Hilton, Timothy W.; Brailsford, Gordon W.; Gray, Sally; Moss, Rowena C.; Mikaloff-Fletcher, Sara

doi:10.1098/rsta.2022.0204

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ff and CO to identify emission sources at different site types in Auckland, New Zealand

2023
By Young, Hayden A. ; Turnbull, Jocelyn C. ; Keller, Elizabeth D. ; ...
Source: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 381(2261)

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Journal Title:

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Personal Author:

Young, Hayden A. ; Turnbull, Jocelyn C. ; Keller, Elizabeth D. ; Domingues, Lucas Gatti ; Parry-Thompson, Jeremy ; ... More +

Young, Hayden A. ; Turnbull, Jocelyn C. ; Keller, Elizabeth D. ; Domingues, Lucas Gatti ; Parry-Thompson, Jeremy ; Hilton, Timothy W. ; Brailsford, Gordon W. ; Gray, Sally ; Moss, Rowena C. ; Mikaloff-Fletcher, Sara Less -
NOAA Program & Office:

CIRES (Cooperative Institute for Research in Environmental Sciences)
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As part of the CarbonWatch-NZ research programme, air samples were collected at 28 sites around Auckland, New Zealand, to determine the atmospheric ratio ( R CO ) of excess (local enhancement over background) carbon monoxide to fossil CO 2 (CO 2 ff). Sites were categorized into seven types (background, forest, industrial, suburban, urban, downwind and motorway) to observe R CO around Auckland. Motorway flasks observed R CO of 14 ± 1 ppb ppm −1 and were used to evaluate traffic R CO . The similarity between suburban (14 ± 1 ppb ppm −1 ) and traffic R CO suggests that traffic dominates suburban CO 2 ff emissions during daytime hours, the period of flask collection. The lower urban R CO (11 ± 1 ppb ppm −1 ) suggests that urban CO 2 ff emissions are comprised of more than just traffic, with contributions from residential, commercial and industrial sources, all with a lower R CO than traffic. Finally, the downwind sites were believed to best represent R CO for Auckland City overall (11 ± 1 ppb ppm −1 ). We demonstrate that the initial discrepancy between the downwind R CO and Auckland's estimated daytime inventory R CO (15 ppb ppm −1 ) can be attributed to an overestimation in inventory traffic CO emissions. After revision based on our observed motorway R CO , the revised inventory R CO (12 ppb ppm −1 ) is consistent with our observations. This article is part of the Theo Murphy meeting issue 'Radiocarbon in the Anthropocene'.
Keywords:

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General Engineering General Mathematics General Physics And Astronomy
Source:

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 381(2261)
DOI:

https://doi.org/10.1098/rsta.2022.0204
ISSN:

1364-503X;1471-2962;
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The Royal Society
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Journal Article
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https://creativecommons.org/licenses/by/4.0/
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CC BY
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urn:sha256:9434dcca31e77b1a097ea13805c4d7218c13dcbc49764aabf268fa5f2213f845
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https://repository.library.noaa.gov/view/noaa/59057/noaa_59057_DS1.pdf
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ff and CO to identify emission sources at different site types in Auckland, New Zealand

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