![Screen Shot 2015-04-29 at 11.42.50 AM](https://aganesan.blogs.bris.ac.uk/files/2015/04/Screen-Shot-2015-04-29-at-11.42.50-AM-300x229.png)
In a new study published in the Proceedings of the National Academy of Sciences, we investigated the sources of discrepancy between HFC emissions reported to the UNFCCC and “top-down” emissions inferred from atmospheric observations. We found that the majority of the gap can be attributed to non-reporting or developing nations. But interestingly, we found that reports from developed (or Annex 1 nations) were accurate when looking at HFCs in aggregate but were significantly over or under-reported for individual species. This has significant implications for improving the methodologies used to inventory HFC emissions. A summary of the findings can be found in a press release from the University of Bristol.