ISSI Working Group on
Atmospheric Water Vapour

Goal and expected output of the working group

Various instruments on ground, balloon, aircraft, and satellite platforms are required for adequate observation of the extremely variable, spatio-temporal distribution of atmospheric water vapour. Accurate, height-resolved measurements of water vapour over the whole altitude range from the ground to the stratosphere are a challenging task for all available traditional and modern measurement techniques, as the water vapour mixing ratio varies over five orders of magnitude. The inter-comparison of various measurement techniques and methods allows the assessment of their accuracy and is a prerequisite for a planned and efficient improvement of instruments and data analysis techniques.

The aim of the ISSI-working group on water vapour is to investigate in detail: