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| Titel |
CO, NOx and 13CO2 as tracers for fossil fuel CO2: results from a pilot study in Paris during winter 2010 |
| VerfasserIn |
M. López, M. Schmidt, M. Delmotte, A. Colomb, V. Gros, C. Janssen, S. J. Lehman, D. Mondelain, O. Perrussel, M. Ramonet, I. Xueref-Remy, P. Bousquet |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 13, no. 15 ; Nr. 13, no. 15 (2013-08-01), S.7343-7358 |
| Datensatznummer |
250018795
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| Publikation (Nr.) |
 copernicus.org/acp-13-7343-2013.pdf |
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| Zusammenfassung |
| Measurements of the mole fraction of the CO2 and its isotopes were
performed in Paris during the MEGAPOLI winter campaign
(January–February 2010). Radiocarbon (14CO2) measurements were
used to identify the relative contributions of 77% CO2 from
fossil fuel consumption (CO2ff from liquid and gas combustion) and
23% from biospheric CO2 (CO2 from the use of biofuels and
from human and plant respiration: CO2bio). These percentages
correspond to average mole fractions of 26.4 ppm and
8.2 ppm for CO2ff and CO2bio, respectively. The
13CO2 analysis indicated that gas and liquid fuel contributed
70% and 30%, respectively, of the CO2 emission from fossil
fuel use. Continuous measurements of CO and NOx and the ratios
CO/CO2ff and NOx/CO2ff derived from
radiocarbon measurements during four days make it possible to estimate
the fossil fuel CO2 contribution over the entire campaign. The
ratios CO/CO2ff and NOx/CO2ff are
functions of air mass origin and exhibited daily ranges of 7.9 to
14.5 ppb ppm−1 and 1.1 to 4.3 ppb ppm−1, respectively.
These ratios are consistent with different emission inventories given the
uncertainties of the different approaches. By using both tracers
to derive the fossil fuel CO2, we observed similar diurnal
cycles with two maxima during rush hour traffic. |
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