Abstract: AbstractInformation is now available regarding the vertical distribution of water vapour and helium in the lower stratosphere over southern England. The helium content of the air is found to be remarkably constant up to 20 km but the water content is found to fall very rapidly just above the tropopause, and in the lowest 1 km of the stratosphere the humidity mixing ratio falls through a ratio of 10—1.The helium distribution is not compatible with the view of a quiescent stratosphere free from turbulence or vertical motions. The water‐vapour...
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Topics: 
Atmospheric sciences
Climatology
Meteorology