Showing papers by "Prasad Varanasi published in 1988"
TL;DR: The absolute intensities of the strong infrared absorption bands of several chlorofluorocarbons (CFCs) located in the atmospheric window have been measured in this paper, in addition to CFC11 and CFC12, CFCs 13, 14, 13B1, 22, 113, 114, and 116.
Abstract: The absolute intensities of the strong infrared absorption bands of several chlorofluorocarbons (CFCs) located in the atmospheric window have been measured. The CFCs studied in the present experiments are, in addition to CFC11 and CFC12, CFCs 13, 14, 13B1, 22, 113, 114, and 116.
42 citations
TL;DR: In this article, the authors present new results on the continuum absorption of water vapor in the thermal i.r. between 8 and 14μm and a brief review of currently adapted empirical and semi-empirical models explaining its nature.
Abstract: Some new results on the continuum absorption of water vapor in the thermal i.r. between 8 and 14μm are presented along with a brief review of currently adapted empirical and semi-empirical models explaining its nature. The original suggestion by Penner 1 that the observed absorption might be by dimers of water molecules in the vapor phase is reexamined in light of the new results.
33 citations
TL;DR: In this article, a low-temperature absorption cell consisting of a nickel-coated copper tube is described, and the lack of an adequate theoretical model for variation of the collision-broadened line width with temperature in terms of the molecular constants of the colliding partners is pointed out.
Abstract: Recent theoretical models and measurements of the variation of collision-broadened line width with temperature in the infrared are discussed for temperatures relevant to planetary atmospheres. The present review is restricted to lines broadened by H2, N2, O2, CO2, and He, the lines formed in the atmospheres of Jupiter, Saturn, Uranus, and Neptune. The design for a low-temperature absorption cell consisting of a nickel-coated copper tube is described. The lack of an adequate theoretical model for variation of the collision-broadened line width with temperature in terms of the molecular constants of the colliding partners is pointed out.
32 citations
24 Aug 1988
TL;DR: The thermal infrared spectrum of water vapor beyond 8 pm consists of a fairly well-understood spectrum of rotational lines and an inadequately described continuum spectrum underlying the observed spectral lines as discussed by the authors.
Abstract: The thermal infrared spectrum of water vapor beyond 8 pm consists of a fairly well-understood spectrum of rotational lines and an inadequately described continuum spectrum underlying the observed spectral lines. The contribution of the continuum absorption can be important in the calculations of the atmospheric radiative heating rates and of the net surface flux. This paper presents some new results on the continuum absorption in the thermal infrared between 8 and 18 μm along with a brief review of currently adapted empirical and semi-empirical models explaining its nature.
32 citations
TL;DR: The absolute intensities of the strong absorption bands of CFC11 and CFC12 have been remeasured at 300 K in view of their importance in global climatic impact and ozone depletion studies as mentioned in this paper.
Abstract: The absolute intensities of the strong absorption bands of CFC11 (CFCl 3 ) and CFC12 (CF 2 Cl 2 ) have been remeasured at 300 K in view of their importance in global climatic impact and ozone depletion studies. For CFC11, our new values are 1718 ± 17 cm −2 atm −1 (846 cm −1 band) and 671 ± 8 cm −2 atm −1 (1085 cm −1 band). The values we have now obtained for the CFC12 intensities are 1421 ± 12 cm −2 atm −1 (923 cm −1 band), 1129 ± 11 cm −2 atm −1 (1102 cm −1 band), and 717 ± 14 cm −2 atm −1 (1161 cm −1 band).
10 citations
TL;DR: The absolute intensities of the ν 1 band system and of the 2ν 2 0 band system of N 2 O have been measured using the Wilson-Wells-Penner-Weber technique.
Abstract: The absolute intensities of the ν 1 band system and of the 2ν 2 0 band system of N 2 O have been measured using the Wilson—Wells—Penner—Weber technique. The intensities we have obtained are 225 ± 2 cm −2 atm −1 for the ν 1 band system and 8.46 ± 0.09 cm −2 atm −1 for the 2ν 2 0 band system.
4 citations