Dw. Arlander et al., THE DISTRIBUTION OF ACETALDEHYDE IN THE LOWER TROPOSPHERE DURING TROPOZ-II, Journal of atmospheric chemistry, 22(3), 1995, pp. 243-249
A series of 72 measurements of the acetaldehyde (CH3CHO) mixing ratio
were made in the lower troposphere during TROPOZ II. These measurement
s are the first ever made of the background level of this trace gas in
the free troposphere. The data show a vertical decrease of the CH3CHO
mixing ratio with increasing altitude and indicate higher CH3CHO conc
entrations in the Northern Hemisphere - in general agreement with a mo
del-derived average CH3CHO distribution. Deviations of the observed CH
3CHO mixing ratios from the modelled mean distribution are correlated
with similar deviations in the corresponding HCHO mixing ratios.