The conclusions of the results obtained
in this study are such that no method of computing
vertical velocity here tried inspires any real
confidence, when applied under realistic'field'
conditions as they now exist in N.W.Europe i.e. radio-sonde ascents at a time interval of 12 hours (though
on a moderately close network), and upper -air winds
at 6-hour intervals and to the nearest ten degrees
The study indicates that some at least of
the methods based on the adiabatic assumption
probably yield vertical motion patterns of reasonable , accuracy over restricted areas and at higher levels.
Trial of kinematic and dynamic methods produced
extremely erratic results in terms of what appeared
to be the physical reality of the test situation.
The results of the calculation of probable errors
of computed values or of independent trials in a
given situation are such as to hold out little hope
of the successful application of these methods in the
present 'field' conditions described. In addition,
basic difficulties related to the scale of the movement
involved in the study arose with both these methods.