Quantitative role of far-infrared emission on diabatic forcing of the middle and upper troposphere in clear and cloudy conditions

Rolando Rizzi; Tiziano Maestri; Roberta Amorati

doi:10.1117/12.454248

30 January 2002 Quantitative role of far-infrared emission on diabatic forcing of the middle and upper troposphere in clear and cloudy conditions

Rolando Rizzi, Tiziano Maestri, Roberta Amorati

Author Affiliations +

Proceedings Volume 4485, Optical Spectroscopic Techniques, Remote Sensing, and Instrumentation for Atmospheric and Space Research IV; (2002) https://doi.org/10.1117/12.454248
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

The clear sky radiative energy balance in the infrared spectrum is investigated with particular attention to the role of water vapor pure rotational band in the spectral range 10-600 cm-1. Main results for Tropical and Sub Arctic Winter atmospheres are in good agreement with those previously reported by other authors. Multiple scattering layers, simulating the presence of cirrus clouds, are used in Tropical atmosphere. The cloudy tropospheric heat balance is studied by the introduction of spectral power densities instead of spectral heating rates. Distribution of radiant energy between air molecules and cloud ice crystals is taken into account and the effects of cirrus absorption and scattering are distinguished. Finally a comparison between Mie and Fu parameterization is performed to understand the effects of more realistically shaped cirrus particles.

Citation Download Citation

Rolando Rizzi, Tiziano Maestri, and Roberta Amorati "Quantitative role of far-infrared emission on diabatic forcing of the middle and upper troposphere in clear and cloudy conditions", Proc. SPIE 4485, Optical Spectroscopic Techniques, Remote Sensing, and Instrumentation for Atmospheric and Space Research IV, (30 January 2002); https://doi.org/10.1117/12.454248

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