Model, software, and database for computation of line-mixing effects in infrared Q branches of atmospheric CO2. I. Symmetric isotopomers.

Details Model, software, and database for computation of line-mixing effects in infrared Q branches of atmospheric CO2. I. Symmetric isotopomers. Model, software, and database for computation of line-mixing effects in infrared Q branches of atmospheric CO2. I. Symmetric isotopomers.

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999jqsrt..61..153r&link_type=abstract

Journal of Quantitative Spectroscopy and Radiative Transfer, vol. 61, issue 2, pp. 153-184

Computer Science

Sound

25

Earth Atmosphere: Radiative Transfer, Earth Atmosphere: Infrared Radiation, Molecular Processes: Carbon Dioxide

Scientific paper

A theoretical model based on the energy-corrected sudden approximation is used in order to account for line-mixing effects in infrared Q branches of symmetric isotopomers of CO2. Its performance is demonstrated by comparisons with a large number (about 130) of CO2-N2 and CO2-O2 laboratory spectra recorded by several instrument setup: nine Q branches of different vibrational symmetries lying between 4 and 17 μm are investigated in wide ranges of pressure (0.05-10 atm) and temperature (200-300 K). The model is used to generate a set of suitable parameters and FORTRAN software (available by ftp) for the calculation of the absorption within 12C16O2, 13C16O2, and 12C18O2 infrared Q branches under atmospheric conditions, which can be easily included in existing radiance/transmission computer codes. Comparisons are made between many (about 280) computed atmospheric spectra and values measured using two different balloon-borne high-resolution Fourier transform instruments: transmission (solar occultation) as well as radiance (limb emission) measurements of seven Q branches between 12 and 17 μm for a large range of atmospheric air masses and pressure/temperature conditions have been used, including the ν2 band of both 12C16O2 and 13C16O2. The results confirm the need to account for the effects of line-mixing and demonstrate the capability of the model to represent accurately the absorption in regions which are often used for temperature/pressure sounding of the atmosphere by space instruments. Finally, quantitative criteria assessing the validity of the widely used Rosenkranz first-order approximation are given.

Affiliated with

Also associated with

No associations

Rating

Model, software, and database for computation of line-mixing effects in infrared Q branches of atmospheric CO2. I. Symmetric isotopomers. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Model, software, and database for computation of line-mixing effects in infrared Q branches of atmospheric CO2. I. Symmetric isotopomers., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Model, software, and database for computation of line-mixing effects in infrared Q branches of atmospheric CO2. I. Symmetric isotopomers. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1611596