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| Titel |
Carbon monoxide (CO) and ethane (C2H6) trends from ground-based solar FTIR measurements at six European stations, comparison and sensitivity analysis with the EMEP model |
| VerfasserIn |
J. Angelbratt, J. Mellqvist, D. Simpson, J. E. Jonson, T. Blumenstock, T. Borsdorff, P. Duchatelet, F. Forster, F. Hase, E. Mahieu, M. Mazière, J. Notholt, A. K. Petersen, U. Raffalski, C. Servais, R. Sussmann, T. Warneke, C. Vigouroux |
| 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 ; 11, no. 17 ; Nr. 11, no. 17 (2011-09-08), S.9253-9269 |
| Datensatznummer |
250010061
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| Publikation (Nr.) |
 copernicus.org/acp-11-9253-2011.pdf |
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| Zusammenfassung |
| Trends in the CO andC2H6 partial columns ~0–15 km) have
been estimated from four European ground-based solar FTIR (Fourier Transform
InfraRed) stations for the 1996–2006 time period. The CO trends from the
four stations Jungfraujoch, Zugspitze, Harestua and Kiruna have been
estimated to −0.45 ± 0.16% yr−1,
−1.00 ± 0.24% yr−1, −0.62 ± 0.19 % yr−1 and
−0.61 ± 0.16% yr−1, respectively. The corresponding trends for
C2H6 are −1.51 ± 0.23% yr−1,
−2.11 ± 0.30% yr−1, −1.09 ± 0.25% yr−1 and
−1.14 ± 0.18% yr−1. All trends are presented with their
2-σ confidence intervals. To find possible reasons for the CO trends,
the global-scale EMEP MSC-W chemical transport model has been used in a
series of sensitivity scenarios. It is shown that the trends are consistent
with the combination of a 20% decrease in the anthropogenic CO emissions
seen in Europe and North America during the 1996–2006 period and a 20%
increase in the anthropogenic CO emissions in East Asia, during the same time
period. The possible impacts of CH4 and biogenic volatile organic
compounds (BVOCs) are also considered. The European and global-scale EMEP
models have been evaluated against the measured CO and C2H6 partial
columns from Jungfraujoch, Zugspitze, Bremen, Harestua, Kiruna and
Ny-Ålesund. The European model reproduces, on average the measurements at
the different sites fairly well and within 10–22% deviation for CO and
14–31% deviation for C2H6. Their seasonal amplitude is
captured within 6–35% and 9–124% for CO and C2H6,
respectively. However, 61–98% of the CO and C2H6 partial
columns in the European model are shown to arise from the boundary
conditions, making the global-scale model a more suitable alternative when
modeling these two species. In the evaluation of the global model the average
partial columns for 2006 are shown to be within 1–9% and 37–50%
of the measurements for CO and C2H6, respectively. The global model
sensitivity for assumptions made in this paper is also analyzed. |
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