Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2009, Issue 6, Vol. 2, pp. 324-332
Joint analysis of short-period variations of ionospheric parameters in
Siberia and the Far East and processes of the tropical cyclogenesis
М.А. Черниговская
1, В.И. Куркин
1, И.И. Орлов
1, Е.А. Шарков
2, И.В. Покровская
21 Институт солнечно-земной физики СО РАН, 664033, г. Иркутск, а/я 291
2 Институт космических исследований РАН, 117997, г. Москва, ул. Профсоюзная, д. 84/32
In this work a possibility of manifestation of strong meteorological disturbances in the Earth lower
atmosphere in variations of ionospheric parameters in the zone remote from the disturbance source has
been studied. By the spectral analysis the short-period variations (about ten minutes, hours) in maximum
observed frequencies (MOF) of one-skip signals of oblique sounding has been analyzed. These variations
were induced by changes in the upper atmosphere parameters along the Magadan-Irkutsk obliqueincidence
sounding path on the background of diurnal variations in the parameter under study. Data on
MOF measurements with off-duty factor approximately 5 min in equinoxes (September) of 2005-2007
were used. The analysis was made using the improved ISTP-developed technique of determining
periodicities in time series. The increase of signal spectrum energy at certain frequencies is interpreted as
manifestation of traveling ionospheric disturbances (TID) associated with propagation of internal gravity
waves in the atmosphere. The analysis revealed TIDs of temporal scales under consideration. The
question concerning localization of possible sources of revealed disturbances is discussed. Troposphere
meteorological disturbances giant in their energy (tropical cyclones, typhoon) are considered as potential
sources of observable TIDs. The needed information on tropical cyclones that occurred in the north area
of the Indian Ocean, south-west and central areas of the Pacific Ocean in 2005-2007 is taken from the
electron base of satellite data on the global tropical cyclogenesis Global-TC (ISR RAS). In order to
effectively separate disturbances associated with the magnetospheric-ionospheric interaction and
disturbances induced by the lower atmosphere influence on the upper atmosphere, we analyze the
tropical cyclogenesis events that occurred in quiet helio-geomagnetic conditions.
Keywords: upper and middle atmosphere, ionosphere, atmosphere layers coupling, wave disturbances, tropical cyclones
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