Carbon Monoxide (CO) And Ethane (C 2 H 6 ) Trends From Ground ...

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Articles | Volume 11, issue 17 https://doi.org/10.5194/acp-11-9253-2011 © Author(s) 2011. This work is distributed under the Creative Commons Attribution 3.0 License. Special issue:

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https://doi.org/10.5194/acp-11-9253-2011 © Author(s) 2011. This work is distributed under the Creative Commons Attribution 3.0 License. Articles | Volume 11, issue 17

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Research article | 08 Sep 2011 Research article | | 08 Sep 2011 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 J. Angelbratt, J. Mellqvist, D. Simpson, J. E. Jonson, T. Blumenstock, T. Borsdorff, P. Duchatelet, F. Forster, F. Hase, E. Mahieu, M. De Mazière, J. Notholt, A. K. Petersen, U. Raffalski, C. Servais, R. Sussmann, T. Warneke, and C. Vigouroux

J. Angelbratt

× Chalmers University of Technology, Göteborg, Sweden

J. Mellqvist

× Chalmers University of Technology, Göteborg, Sweden

D. Simpson

× Chalmers University of Technology, Göteborg, Sweden EMEP MSC-W, Norwegian Meteorological Institute, Oslo, Norway

J. E. Jonson

× EMEP MSC-W, Norwegian Meteorological Institute, Oslo, Norway

T. Blumenstock

× Karlsruhe Institute of Technology (KIT), Institute for Meteorology and Climate Research (IMK-ASF), Karlsruhe, Germany

T. Borsdorff

× Karlsruhe Institute of Technology (KIT), Institute for Meteorology and Climate Research (IMK-ASF), Garmisch-Patenkirchen, Germany

P. Duchatelet

× Institute of Astrophysics and Geophysics, University of Liège, Liège, Belgium

F. Forster

× Karlsruhe Institute of Technology (KIT), Institute for Meteorology and Climate Research (IMK-ASF), Garmisch-Patenkirchen, Germany

F. Hase

× Karlsruhe Institute of Technology (KIT), Institute for Meteorology and Climate Research (IMK-ASF), Karlsruhe, Germany

E. Mahieu

× Institute of Astrophysics and Geophysics, University of Liège, Liège, Belgium

M. De Mazière

× Belgian Institute for Space Aeronomy (BIRA-IASB), Brussels, Belgium

J. Notholt

× Institute of Environmental Physics, University of Bremen, Bremen, Germany

A. K. Petersen

× Institute of Environmental Physics, University of Bremen, Bremen, Germany Present address: Max-Planck-Institute for Meteorology, Hamburg, Germany

U. Raffalski

× Karlsruhe Institute of Technology (KIT), Institute for Meteorology and Climate Research (IMK-ASF), Karlsruhe, Germany

C. Servais

× Institute of Astrophysics and Geophysics, University of Liège, Liège, Belgium

R. Sussmann

× Karlsruhe Institute of Technology (KIT), Institute for Meteorology and Climate Research (IMK-ASF), Garmisch-Patenkirchen, Germany

T. Warneke

× Institute of Environmental Physics, University of Bremen, Bremen, Germany

C. Vigouroux

× Belgian Institute for Space Aeronomy (BIRA-IASB), Brussels, Belgium

Abstract. 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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Share How to cite. Angelbratt, J., Mellqvist, J., Simpson, D., Jonson, J. E., Blumenstock, T., Borsdorff, T., Duchatelet, P., Forster, F., Hase, F., Mahieu, E., De Mazière, M., Notholt, J., Petersen, A. K., Raffalski, U., Servais, C., Sussmann, R., Warneke, T., and Vigouroux, C.: 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, Atmos. Chem. Phys., 11, 9253–9269, https://doi.org/10.5194/acp-11-9253-2011, 2011. Received: 22 Mar 2011 – Discussion started: 05 May 2011 – Revised: 09 Aug 2011 – Accepted: 28 Aug 2011 – Published: 08 Sep 2011 Download

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