Abundances, emissions, and loss processes of the long-lived and potent greenhouse gas octafluorooxolane (octafluorotetrahydrofuran, c-C4F8O) in the atmosphere
التفاصيل البيبلوغرافية
العنوان:
Abundances, emissions, and loss processes of the long-lived and potent greenhouse gas octafluorooxolane (octafluorotetrahydrofuran, c-C4F8O) in the atmosphere
The first observations of octafluorooxolane (octafluorotetrahydrofuran, c-C4F8O), a persistent greenhouse gas, in the atmosphere are reported. In addition, a complimentary laboratory study of its most likely atmospheric loss processes and infrared absorption spectrum and global warming potential (GWP) are reported. First atmospheric measurements of c-C4F8O are provided from the Cape Grim Air Archive (41° S, Tasmania, Australia, 1978–present), supplemented by two firn air samples from Antarctica, in situ measurements of ambient air at Aspendale, Victoria (38° S), and a few archived air samples from the Northern Hemisphere. Atmospheric abundances in the Southern Hemisphere have reached 74 ppq (parts per quadrillion, femtomol mol-1 in dry air) by 2017. However its growth rate has decreased from a maximum in 2004 of 4.3 ppq yr-1 to