Redetemination of monochromatic absorption coefficients of methane with regard to the thermal conditions in the atmospheres of giant planets. I. Absorption band at λ 619 nm,

Details Redetemination of monochromatic absorption coefficients of methane with regard to the thermal conditions in the atmospheres of giant planets. I. Absorption band at λ 619 nm, Redetemination of monochromatic absorption coefficients of methane with regard to the thermal conditions in the atmospheres of giant planets. I. Absorption band at λ 619 nm,

Aug 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002kfnt...18..376m&link_type=abstract

Kinematika i Fizika Nebesnykh Tel, v. 18, no. 4, p. 376-384

Computer Science

2

Scientific paper

We propose a fundamentally new method for defining more exactly the wavelength dependence of the monochromatic absorption coefficients kν in methane absorption bands. The method is based on the lnNL/τs - lnNL plots constructed directly from spectrophotometric observations of planets (NL is the methane amount and τs is the scattering component of optical thickness at the effective depth of formation of diffusely reflected radiation in a semi-infinite atmosphere). The observation data were compared to laboratory determinations of kν (λ) in the methane absorption band at λ 619 nm at temperatures of 290, 200, 150, 125, and 100 K. On the assumption that kν(λ) varies with temperature as kν(λ, T)= kν(λ, 290){(T/290)n(λ)} we determined the parameter n(λ) as well as the coefficient kν(λ) for Jupiter (equilibrium temperature of 125 K), Saturn (96.2K), Uranus, and Neptune (58.7 K).

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