Journal cover Journal topic
Biogeosciences An interactive open-access journal of the European Geosciences Union
Journal topic
Volume 11, issue 7
Biogeosciences, 11, 1941–1959, 2014
https://doi.org/10.5194/bg-11-1941-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: Towards a full GHG balance of the biosphere

Biogeosciences, 11, 1941–1959, 2014
https://doi.org/10.5194/bg-11-1941-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 09 Apr 2014

Research article | 09 Apr 2014

Anthropogenic and natural methane fluxes in Switzerland synthesized within a spatially explicit inventory

R. V. Hiller2,1, D. Bretscher3, T. DelSontro4,5, T. Diem4, W. Eugster6, R. Henneberger5, S. Hobi7, E. Hodson7, D. Imer6, M. Kreuzer6, T. Künzle8, L. Merbold6, P. A. Niklaus9, B. Rihm8, A. Schellenberger10, M. H. Schroth5, C. J. Schubert4, H. Siegrist11, J. Stieger6, N. Buchmann6, and D. Brunner1 R. V. Hiller et al.
  • 1Empa, Swiss Federal Laboratories for Materials Science and Technology, Duebendorf, Switzerland
  • 2Federal Office of Meteorology and Climatology MeteoSwiss, Zurich, Switzerland
  • 3Agroscope, Institute for Sustainability Sciences, Zurich, Switzerland
  • 4Eawag, Swiss Federal Institute of Aquatic Science and Technology, Kastanienbaum, Switzerland
  • 5ETH Zurich, Institute for Biogeochemistry and Pollutant Dynamics, Zurich, Switzerland
  • 6ETH Zurich, Institute of Agricultural Sciences, Zurich, Switzerland
  • 7WSL, Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, Switzerland
  • 8Meteotest, Bern, Switzerland
  • 9University of Zurich, Institute of Evolutionary Biology and Environmental Studies, Zurich, Switzerland
  • 10FOEN, Federal Office for the Environment, Bern, Switzerland
  • 11Eawag, Swiss Federal Institute of Aquatic Science and Technology, Duebendorf, Switzerland

Abstract. We present the first high-resolution (500 m × 500 m) gridded methane (CH4) emission inventory for Switzerland, which integrates 90 % of the national emission totals reported to the United Nations Framework Convention on Climate Change (UNFCCC) and recent CH4 flux studies conducted by research groups across Switzerland. In addition to anthropogenic emissions, we also include natural and semi-natural CH4 fluxes, i.e., emissions from lakes and reservoirs, wetlands, wild animals as well as uptake by forest soils. National CH4 emissions were disaggregated using detailed geostatistical information on source locations and their spatial extent and process- or area-specific emission factors. In Switzerland, the highest CH4 emissions in 2011 originated from the agricultural sector (150 Gg CH4 yr−1), mainly produced by ruminants and manure management, followed by emissions from waste management (15 Gg CH4 yr−1) mainly from landfills and the energy sector (12 Gg CH4 yr−1), which was dominated by emissions from natural gas distribution. Compared with the anthropogenic sources, emissions from natural and semi-natural sources were relatively small (6 Gg CH4 yr−1), making up only 3% of the total emissions in Switzerland. CH4 fluxes from agricultural soils were estimated to be not significantly different from zero (between −1.5 and 0 Gg CH4 yr−1), while forest soils are a CH4 sink (approx. −2.8 Gg CH4 yr−1), partially offsetting other natural emissions. Estimates of uncertainties are provided for the different sources, including an estimate of spatial disaggregation errors deduced from a comparison with a global (EDGAR v4.2) and an European (TNO/MACC) CH4 inventory. This new spatially explicit emission inventory for Switzerland will provide valuable input for regional-scale atmospheric modeling and inverse source estimation.

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