Nature 344, 513 - 516 (05 April 1990); doi:10.1038/344513a0

Model calculations of the relative effects of CFCs and their replacements on global warming

Donald A. Fisher^*, Charles H. Hales^*, Wei-Chyung Wang^†, Malcolm K. W. Ko^† & N. Dak Sze^†

^*E. I. du Pont de Nemours and Company, Experimental Station, Wilmington, Delaware 19880-0320, USA
^†Atmospheric and Environmental Research Inc., 840 Memorial Drive, Cambridge, Massachusetts 02139, USA

Halocarbons can contribute to global warming by absorbing long-wave radiation. Concern over the depletion of stratospheric ozone has led to inter-national agreements that restrict future uses of fully halogenated compounds, such as chloro-fluorocarbons CFC-11 and -12. But most com-pounds proposed as replacements also absorb long-wave radiation, and so their potential contribu-tions as greenhouse gases need to be assessed. Model calculations show that the replacement com-pounds have an effect about an order of magnitude less than that of their regulated counterparts.

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