1989, Zander, R., Ph. Demoulin, D. H. Ehhalt, and U. Schmidt, Secular increase of the vertical column abundance of methane derived from IR solar spectra recorded at the Jungfraujoch station, Journal of Geophysical Research, 94, 11,029-11,039
Tags: CH4, FTIR
1961, Mastenbrook, H.J., Dinger, J.E., Distribution of Water Vapor in the Stratosphere, Journal of Geophysical Research, 66, 1437–1444
Tags: H2O, Sonde