Physics
Scientific paper
Jun 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3512810p&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 12, CiteID L12810
Physics
7
Atmospheric Composition And Structure: Chemical Kinetic And Photochemical Properties, Atmospheric Processes: Climate Change And Variability (1616, 1635, 3309, 4215, 4513), Public Issues: Science Policy (0485), Global Change: Atmosphere (0315, 0325)
Scientific paper
Nitrogen trifluoride (NF3) can be called the missing greenhouse gas: It is a synthetic chemical produced in industrial quantities; it is not included in the Kyoto basket of greenhouse gases or in national reporting under the United Nations Framework Convention on Climate Change (UNFCCC); and there are no observations documenting its atmospheric abundance. Current publications report a long lifetime of 740 yr and a global warming potential (GWP), which in the Kyoto basket is second only to SF6. We re-examine the atmospheric chemistry of NF3 and calculate a shorter lifetime of 550 yr, but still far beyond any societal time frames. With 2008 production equivalent to 67 million metric tons of CO2, NF3 has a potential greenhouse impact larger than that of the industrialized nations' emissions of PFCs or SF6, or even that of the world's largest coal-fired power plants. If released, annual production would increase the lower atmospheric abundance by 0.4 ppt, and it is urgent to document NF3 emissions through atmospheric observations.
Hsu Juno
Prather Michael J.
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