Variability of Mesoscale Atmospheric Pressure Pulsations

V. N. Ivanov*, Yu. S. Rusakov*, B. V. Zubkov**, and V. M. Linkin**

* Taifun Research and Production Association, Institute of Experimental Meteorology,
pr. Lenina 82, Obninsk, Kaluga oblast, 249020 Russia
** Institute for Space Research, Russian Academy of Sciences, ul. Profsoyuznaya 84/32, Moscow, 117810 Russia

Received January 9, 1998; in final form, April 30, 1998

Abstract—The evolution of the variances of atmospheric pressure pulsations within the spectral ranges 1–3,
3–5, 5–10, and 10–17 min is analyzed from the observational data that were obtained at the high-rise meteoro-
logical tower of the Institute of Experimental Meteorology (Obninsk) June–July 1996 by means of a precision
pressure sensor developed at the Institute for Space Research, Russian Academy of Sciences. It is found that a
sharp increase in these pulsations occurs rather frequently and accompanies such atmospheric phenomena as
gravity waves, thunderstorms, microfronts, local atmospheric disturbances, etc. The result of particular interest is
the revelation of the diurnal course of the variance of mesoscale pressure pulsations (of periods from 1 to 3 min
first) with amplitude changes of five to ten times and with its maximum at 13:00 to 15:00 local time. These
changes are assumed to be caused by the influence of the lower atmospheric layer, where the diurnal course of
wind velocity and thermal stability takes place.

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