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Considerable contribution of the Montreal Protocol to declining greenhouse gas emissions from the United States

Hu, L., Montzka, S. A., Lehman, S. J., Godwin, D. S., Miller, B. R., Andrews, A. E., Thoning, K., Miller, J. B., Sweeney, C., Siso, C., Elkins, J. W., Hall, B. D., Mondeel, D. J., Nance, D., Nehrkorn, T., Mountain, M., Fischer, M. L., Biraud, S. C., Chen, H. & Tans, P. P. 16-Aug-2017 In : Geophysical research letters. 44, 15, p. 8075-8083 9 p.

Research output: Scientific - peer-reviewArticle

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  • Considerable contribution of the Montreal Protocol

    Final publisher's version, 1006 KB, PDF-document

    Embargo ends: 16/02/2018

DOI

  • Lei Hu
  • Stephen A. Montzka
  • Scott J. Lehman
  • David S. Godwin
  • Benjamin R. Miller
  • Arlyn E. Andrews
  • Kirk Thoning
  • John B. Miller
  • Colm Sweeney
  • Caroline Siso
  • James W. Elkins
  • Bradley D. Hall
  • Debra J. Mondeel
  • David Nance
  • Thomas Nehrkorn
  • Marikate Mountain
  • Marc L. Fischer
  • Sebastien C. Biraud
  • Huilin Chen
  • Pieter P. Tans

Ozone depleting substances (ODSs) controlled by the Montreal Protocol are potent greenhouse gases (GHGs), as are their substitutes, the hydrofluorocarbons (HFCs). Here we provide for the first time a comprehensive estimate of U.S. emissions of ODSs and HFCs based on precise measurements in discrete air samples from across North America and in the remote atmosphere. Derived emissions show spatial and seasonal variations qualitatively consistent with known uses and largely confirm U.S. Environmental Protection Agency (EPA) national emissions inventories for most gases. The measurement-based results further indicate a substantial decline of ODS emissions from 2008 to 2014, equivalent to similar to 50% of the CO2-equivalent decline in combined emissions of CO2 and all other long-lived GHGs inventoried by the EPA for the same period. Total estimated CO2-equivalent emissions of HFCs were comparable to the sum of ODS emissions in 2014, but can be expected to decline in the future in response to recent policy measures.

Original languageEnglish
Pages (from-to)8075-8083
Number of pages9
JournalGeophysical research letters
Volume44
Issue number15
StatePublished - 16-Aug-2017

    Keywords

  • GLOBAL EMISSIONS, HFC EMISSIONS, EUROPEAN EMISSIONS, TRANSPORT MODELS, INVERSION METHOD, FUTURE-TRENDS, CLIMATE, OZONE, HALOCARBONS, HCFC-22

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