Impact of a new water vapor continuum and line shape model on observed high resolution infrared radiances.

Details Impact of a new water vapor continuum and line shape model on observed high resolution infrared radiances. Impact of a new water vapor continuum and line shape model on observed high resolution infrared radiances.

May 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998jqsrt..59..303s&link_type=abstract

Journal of Quantitative Spectroscopy and Radiative Transfer, vol. 59, issue 3-5, pp. 303-317

Computer Science

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8

Earth Atmosphere: Radiative Transfer, Earth Atmosphere: Water Vapor, Earth Atmosphere: Infrared Radiation, Water Vapor: Infrared Radiation, Water Vapor: Line Broadening

Scientific paper

Line-by-line calculations of up-welling atmospheric radiances are compared to clear-sky radiances observed with the University of Wisconsin High-resolution Interferometer Sounder (HIS). The authors concentrate on water emission in the 1400-1750 cm-1 region which is sensitive to the N2-broadened water continuum. This work applies the authors' recently developed water continuum derived from new laboratory data to atmospheric emission measurements. The atmospheric state under clear-sky conditions was characterized with radiosonde and LIDAR observations. Radiances in-between absorption lines probe the lower troposphere, where the water vapor profiles are best characterized, allowing comparison of several different water continuum models. Closer to the centers of the absorption lines all models yield relatively large errors, most likely due to inaccuracies in the high altitude water vapor radiosonde measurements.

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