Reconciling reported and unreported HFC emissions with atmospheric observations
Name
Lunt-2015-Reconciling reported.pdf
Size
729.95 KB
Format
Adobe PDF
Checksum (MD5)
78e6fb614f0cd605c1a9e4782322dc80
Author(s)
Lunt, Mark F.
Rigby, Matthew
Ganesan, Anita L.
Manning, Alistair J.
Prinn, Ronald G.
O'Doherty, Simon
Muhle, Jens
Harth, Christina M.
Salameh, Peter K.
Arnold, Tim
Date Issued
May 2015
Journal
Proceedings of the National Academy of Sciences
Publisher
National Academy of Sciences (U.S.)
Citation
Lunt, Mark F., Matthew Rigby, Anita L. Ganesan, Alistair J. Manning, Ronald G. Prinn, Simon O’Doherty, Jens Mühle, et al. “Reconciling Reported and Unreported HFC Emissions with Atmospheric Observations.” Proc Natl Acad Sci USA 112, no. 19 (April 27, 2015): 5927–5931.
Version
Final published version
Abstract
We infer global and regional emissions of five of the most abundant hydrofluorocarbons (HFCs) using atmospheric measurements from the Advanced Global Atmospheric Gases Experiment and the National Institute for Environmental Studies, Japan, networks. We find that the total CO[subscript 2]-equivalent emissions of the five HFCs from countries that are required to provide detailed, annual reports to the United Nations Framework Convention on Climate Change (UNFCCC) increased from 198 (175–221) Tg-CO[subscript 2]-eq⋅y[superscript –1] in 2007 to 275 (246–304) Tg-CO[subscript 2]-eq⋅y[superscript –1] in 2012. These global warming potential-weighted aggregated emissions agree well with those reported to the UNFCCC throughout this period and indicate that the gap between reported emissions and global HFC emissions derived from atmospheric trends is almost entirely due to emissions from nonreporting countries. However, our measurement-based estimates of individual HFC species suggest that emissions, from reporting countries, of the most abundant HFC, HFC-134a, were only 79% (63–95%) of the UNFCCC inventory total, while other HFC emissions were significantly greater than the reported values. These results suggest that there are inaccuracies in the reporting methods for individual HFCs, which appear to cancel when aggregated together.
MIT Department
Massachusetts Institute of Technology. Center for Global Change Science
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1073/pnas.1420247112
