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
1989, Rosen, J.M., S.J. Oltmans, W.F. Evans, Balloon borne observations of PSCs, frost point, ozone and nitric acid in the north polar vortex, Geophysical Research Letters, 16, 791-794
Tags: H2O, HNO3, Ozone, PSC, Sonde