1989, Zander, R., Ph. Demoulin, D. H. Ehhalt, U. Schmidt, and C. P. Rinsland, Secular increase of the total vertical column abundance of carbon monoxide above central Europe since 1950, Journal of Geophysical Research, 94, 11,020-11,028
Tags: CO, 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