Biology
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p13a1661g&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #P13A-1661
Biology
[0300] Atmospheric Composition And Structure, [0360] Atmospheric Composition And Structure / Radiation: Transmission And Scattering, [5210] Planetary Sciences: Astrobiology / Planetary Atmospheres, Clouds, And Hazes, [5704] Planetary Sciences: Fluid Planets / Atmospheres
Scientific paper
Spectroscopic observations are a powerful tool for extracting detailed information concerning the properties of planetary atmospheres. The HITRAN molecular spectroscopic database has traditionally served researchers involved with terrestrial atmospheric problems, such as remote-sensing of constituents in the atmosphere, pollution monitoring at the surface, and numerous environmental issues. An extensive effort is currently underway to extend the HITRAN database to have capabilities for studying a variety of planetary atmospheres. Spectroscopic parameters for gases and spectral bands of molecules that are germane to the studies of planetary atmospheres are being assembled. These parameters include the types of data that have already been considered for transmission and radiance algorithms, such as line position, intensity, lower-state energies, and broadening coefficients and their temperature dependences. A major accomplishment of this effort is the assembly and recent release of the HITEMP database, which included spectral parameters suitable for simulating high-temperature and NLTE spectra for H2O, CO2, CO, NO and OH gases. A number of new molecules (such as H2, CS, C4H2, HC3N and C2N2) will be officially released in the near future, while several other molecules (such as SO, CH3 and C3H4) are pending. For some of the molecules, additional parameters beyond what is currently considered for the terrestrial atmosphere will be archived. Examples are collision-broadened half widths due to various foreign partners, collision-induced absorption, and temperature dependence factors. Collision-induced absorption data for H2-H2, H2-N2, H2-He, H2-CH4, CH4-CH4, N2-N2, N2-O2, O2-O2, O2-CO2 and N2-CH4 will be released prior to the AGU meeting. Partition sums that are necessary for applications at a wide range of temperature have recently been calculated for a variety of molecules of planetary interest. Current accomplishments and future efforts will be presented at the meeting. This effort is supported by the NASA Planetary Atmospheres program, under the grant NNX10AB94G.
Gordon Iain
Rothman Laurence S.
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