Radiative Modeling of the Stratosphere of Jupiter

Details Radiative Modeling of the Stratosphere of Jupiter Radiative Modeling of the Stratosphere of Jupiter

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009dps....41.1012z&link_type=abstract

American Astronomical Society, DPS meeting #41, #10.12

Astronomy and Astrophysics

Astronomy

Scientific paper

Based on the recent 2D retrievals for temperature profiles and abundances of ethane (C2H6) and acetylene (C2H2) in the stratosphere of Jupiter from Cassini observations, the short wavelength heating and long wavelength cooling rates are calculated by correlated-k method. The Methane (CH4) k-distribution parameters from Irwin et al. (Icarus, 176, 255, 2006) and Karkoschka and Tomasko (Icarus, in press, 2009) and H2-H2 continuum absorption coefficients from Borysow et al. (A&A, 390, 779, 2002) are used for the heating rates calculations, covering all the CH4 bands from 0.5 µm to 5 µm. The heating rates due to stratospheric aerosol layers are also calculated based on the 2D aerosol distribution from Banfield et al. (Icarus, 134, 11, 1998). In the long wavelength region from 5 µm to 10 µm, the spectroscopic parameters are computed from the HITRAN 2008 database (Rothman et al., JQSRT, 110, 533, 2009), hydrogen-broadening coefficients for hydrocarbons (e.g., Varanasi et. al., JQSRT, 47, 263, 1992), and the recent H2-H2 and H2-He continuum absorption coefficients by Orton et al. (Icarus, 189, 544, 2007). A line-by-line radiative calculation is used to test the accuracy of our method. The quantitative modeling of the aforementioned species is important for constraining the 2D transport and chemistry of Jupiter. The major heat sources (short wavelength CH4 bands and aerosol absorption) and dominant coolants in the long wavelength spectral region for different pressure levels are studied.

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