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Short-period variations in surface pressure and wind

✍ Scribed by I. J. W. Pothecary

Book ID
104571609
Publisher
John Wiley and Sons
Year
1954
Tongue
English
Weight
415 KB
Volume
80
Category
Article
ISSN
0035-9009

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✦ Synopsis

Abstract

Periodic variations in surface pressure and wind velocity recorded by autographic instruments on 5 July 1952 are related to wave motion along a horizontal temperature discontinuity. The wave motion is considered to have been set up when the outflow of cold air from an intense outbreak of thunderstorms over the western English Channel temporarily blocked the north‐easterly airstream beneath an inversion over southern England and the Midlands.

The oscillation was propagated upstream of the lower current and across the upper south‐easterly current for over 250 mi, with an amplitude approaching 200 m in the earlier stage.

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## Abstract Measurements made with 2 field mills, 100 m apart, along the direction of the surface wind, have been used to obtain information about the charges responsible for variations in the potential gradient over periods of the order of minutes. In general these variations are caused by the hor