Atmos. Chem. Phys. Discuss., 9, 22803-22831, 2009
www.atmos-chem-phys-discuss.net/9/22803/2009/
doi:10.5194/acpd-9-22803-2009
© Author(s) 2009. This work is distributed
under the Creative Commons Attribution 3.0 License.
Review Status
This discussion paper has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP.
The municipal solid waste landfill as a source of ozone-depleting substances in the United States and United Kingdom
E. L. Hodson1,*, D. Martin2, and R. G. Prinn1
1Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
2School of Chemistry, University of Bristol, Bristol BS8 1TS, UK
*now at: Swiss Federal Research Institute WSL, Zuercherstrasse 111, 8903 Birmensdorf, Switzerland

Abstract. This study provides observation-based national estimates of CFC-11, CFC-12, CFC-113, and 1,1,1-trichloroethane emissions for the United States (US) and United Kingdom (UK) from municipal solid waste (MSW) landfills. The scarcity of national estimates has lead to the assumption that a significant fraction of the lingering ozone-depleting substance (ODS) emissions, which have been detected in industrialized countries, could be emitted from landfills. Spatial coverage was achieved through sampling at seven landfills in Massachusetts and through data provided by nine UK landfills. Linear least square regressions of recovered ODS vs. CH4 were used in combination with national estimates of landfill CH4 emissions to estimate 2006 national US and UK ODS landfill emissions. The ODS landfill emission estimates were then compared to recent estimates of total US and UK ODS emissions. US ODS landfill emissions were 0.4%–0.9% (0.006–0.09 Gg/year) of total US emissions. UK ODS landfill emission estimates were 1% (0.008 Gg/year) and 6% (0.03 Gg/year) of total UK CFC-11 and CFC-12 emissions, respectively. This indicates that landfills are only a minor source of lingering ODS emissions in the US, but may be more significant for CFC-12 emissions in the UK. The implications are that the majority of current ODS emissions in industrialized countries are likely coming from equipment still in use.

Citation: Hodson, E. L., Martin, D., and Prinn, R. G.: The municipal solid waste landfill as a source of ozone-depleting substances in the United States and United Kingdom, Atmos. Chem. Phys. Discuss., 9, 22803-22831, doi:10.5194/acpd-9-22803-2009, 2009.
 
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