|Title||Recent and future trends in synthetic greenhouse gas radiative forcing|
|Publication Type||Journal Article|
|Year of Publication||2014|
|Authors||Rigby M, Prinn RG, O'Doherty S, Miller B.R, Ivy D., Mühle J, Harth CM, Salameh PK, Arnold T., Weiss RF, Krummel PB, Steele LP, Fraser PJ, Young D, Simmonds PG|
|Journal||Geophysical Research Letters|
|Type of Article||Article|
|Keywords||atmospheric measurements; emissions; hcfc-22; history; hydrofluorocarbons; in-situ measurements; inverse modeling; lifetimes; montreal protocol; perfluorocarbons; radiative forcing; station; synthetic greenhouse gas|
Atmospheric measurements show that emissions of hydrofluorocarbons (HFCs) and hydrochlorofluorocarbons are now the primary drivers of the positive growth in synthetic greenhouse gas (SGHG) radiative forcing. We infer recent SGHG emissions and examine the impact of future emissions scenarios, with a particular focus on proposals to reduce HFC use under the Montreal Protocol. If these proposals are implemented, overall SGHG radiative forcing could peak at around 355mWm(-2) in 2020, before declining by approximately 26% by 2050, despite continued growth of fully fluorinated greenhouse gas emissions. Compared to no HFC policy projections, this amounts to a reduction in radiative forcing of between 50 and 240mWm(-2) by 2050 or a cumulative emissions saving equivalent to 0.5 to 2.8years of CO2 emissions at current levels. However, more complete reporting of global HFC emissions is required, as less than half of global emissions are currently accounted for.