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. 2017 Jun 27;8:15962. doi: 10.1038/ncomms15962

Figure 2. Time trend in global halocarbon emissions.

Figure 2

Emissions derived from a simple 1-box model for CCl4 (dotted line), CFC-11 (dashed line) and CH2Cl2 (crosses) in units of Gigagrams (Gg) of source gas per year. Calculation for CH2Cl2 based on a parameterized global mean lifetime of 0.43 years. Also shown are recent independent estimates of CH2Cl2 emissions (orange points) from the AGAGE 12-box model15. Error bars denote uncertainty range.