Showing papers on "Atmospheric methane published in 1969"
TL;DR: In this article, infrared solar spectra in the region around 1300 cm−1 were obtained at numerous altitudes up to 30 km by a balloon flight made December 7, 1967, and compared with the observed absorption and the predicted absorption predicted using a line-by-line calculation have been used to determine the amount of methane in the atmosphere above the tropopause.
Abstract: During a balloon flight made December 7, 1967, infrared solar spectra in the region around 1300 cm−1 were obtained at numerous altitudes up to 30 km. This spectral region contains a strong absorption band due to atmospheric methane. Comparisons between the observed absorption and the absorption predicted using a line-by-line calculation have been used to determine the amount of methane in the atmosphere above the tropopause. These determinations indicate that the methane concentration decreases by as much as a factor of 5 above the tropopause.
18 citations