The measurement and extraction of the <nu> 6 atmospheric emission band of CFC-12 from interfering emission features

Details The measurement and extraction of the <nu> 6 atmospheric emission band of CFC-12 from interfering emission features The measurement and extraction of the <nu> 6 atmospheric emission band of CFC-12 from interfering emission features

Sep 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995angeo..13..969e&link_type=abstract

Annales Geophysicae, vol. 13, Issue 9, pp.969-972

Physics

1

Scientific paper

Ground-based thermal emission measurements of the zenith sky have been made at Peterborough, Ontario since January 1993. In this paper, the measurement of the 6 band of atmospheric CFC-12, an important greenhouse gas, is presented for a cold, clear day in January 1994. A spectrum of the non-CFC-12 emission features has been simulated using the FASCD3P radiation code and measured radiosonde profiles of temperature, pressure and humidity. This has enabled a satisfactory subtraction of the interfering emission features from the CFC-12 emission spectrum. A comparison of the observed and simulated 6-bands of CFC-12 shows good agreement at all frequencies of emission. From these spectra the total downward greenhouse radiative flux from the CFC-12 6 emission based for a very cold day has been estimated to be 0.27 W m-2+/-10%.

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