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Atmospheric sulfur hexafluoride - Sources, sinks and greenhouse warmingAn estimate is obtained of worldwide production of SF6, from which a global emission rate is derived and extrapolated for the next 20 years. The atmospheric lifetime of SF6 is then estimated based on a known mechanism (e.g., photolysis and atmospheric oxidation) and/or on the mass balance method. Finally, the radiative forcing of SF6 is calculated based on recent laboratory IR absorption data, and the expected warming over the time period 1950-2010 is computed for several emission scenarios. Calculations showed that SF6 is 3 times more effective as a greenhouse gas compared to CFC 11 on a per-molecule basis. However, based on projected emission scenarios, the expected warming from SF6 through 2010 is small (0.004 C), compared to the warming from CO2 and other trace gases (0.8 C).
Document ID
19930061193
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Ko, Malcolm K. W.
(NASA Langley Research Center Hampton, VA, United States)
Sze, Nien D.
(Atmospheric and Environment Research, Inc. Cambridge, MA, United States)
Wang, Wei-Chyung
(Atmospheric and Environment Research, Inc., Cambridge, MA; New York State Univ. Albany, United States)
Shia, George
(Allied-Signal, Inc. Buffalo, NY, United States)
Goldman, Aaron
(NASA Langley Research Center Hampton, VA, United States)
Murcray, Frank J.
(NASA Langley Research Center Hampton, VA, United States)
Murcray, David G.
(Denver Univ. CO, United States)
Rinsland, Curtis P.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 16, 2013
Publication Date
June 20, 1993
Publication Information
Publication: Journal of Geophysical Research
Volume: 98
Issue: D6
ISSN: 0148-0227
Subject Category
Environment Pollution
Accession Number
93A45190
Funding Number(s)
CONTRACT_GRANT: NASW-4428
Distribution Limits
Public
Copyright
Other

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