A Potent Greenhouse Gas Identified in the Atmosphere: SF 5 CF 3

We detected a compound previously unreported in the atmosphere, trifluoromethyl sulfur pentafluoride (SF 5 CF 3 ). Measurements of its infrared absorption cross section show SF 5 CF 3 to have a radiative forcing of 0.57 watt per square meter per parts per billion. This is the largest radiative forci...

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Bibliographic Details
Published in:Science
Main Authors: Sturges, W. T., Wallington, T. J., Hurley, M. D., Shine, K. P., Sihra, K., Engel, A., Oram, D. E., Penkett, S. A., Mulvaney, R., Brenninkmeijer, C. A. M.
Format: Article in Journal/Newspaper
Language:English
Published: American Association for the Advancement of Science (AAAS) 2000
Subjects:
Multidisciplinary
Antarc*
Antarctic
Online Access:http://dx.doi.org/10.1126/science.289.5479.611
https://syndication.highwire.org/content/doi/10.1126/science.289.5479.611
Description
Summary:We detected a compound previously unreported in the atmosphere, trifluoromethyl sulfur pentafluoride (SF 5 CF 3 ). Measurements of its infrared absorption cross section show SF 5 CF 3 to have a radiative forcing of 0.57 watt per square meter per parts per billion. This is the largest radiative forcing, on a per molecule basis, of any gas found in the atmosphere to date. Antarctic firn measurements show it to have grown from near zero in the late 1960s to about 0.12 part per trillion in 1999. It is presently growing by about 0.008 part per trillion per year, or 6% per year. Stratospheric profiles of SF 5 CF 3 suggest that it is long-lived in the atmosphere (on the order of 1000 years).

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