1. Identifying the emissive regions with transport models:
Gosan, spring  summer 2016
Influence from eastern China enhanced
CFC-11 concentration
at Gosan (ppt)
Darker colors indicate surface regions influencing the sample at GSN station
Narrative: …but this is only one model over a limited time range—the analysis in Rigby et al included 4 different inversion frameworks over the period
Met Office NAME model simulations
Enhanced concentrations are typically observed when air was previously influenced by surface regions in eastern China;
Hence, China is likely the dominant source of CFC-11 emissions in this region during this period 14