Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010ge%26ae..50..914v&link_type=abstract
Geomagnetism and Aeronomy, Volume 50, Issue 7, pp.914-919
Physics
Scientific paper
Regular measurements of the velocity and direction of the horizontal wind in the mesosphere/lower thermosphere (MLT) region at a height of ˜95 km have been conducted since 1975 over Eastern Siberia (Badary observatory near Irkutsk), using the spaced-diversity reception method in the LF range. The accumulated database of measurement results (for more than 20 years, from 1974 to 1996) makes it possible to get information on the impact on wind in the MLT region from both below (stratospheric warmings) and above (geomagnetic storms as a consequence of magnetospheric disturbances) with sufficient statistical reliability. Effects of stratospheric warmings and strong geomagnetic storms in the prevailing wind and amplitude of the semidiurnal tide are evaluated by the superposed epoch method. It is shown that the effects of stratospheric warmings depend on the type (intensity) of stratospheric warming and on the phase of quasi-biennial oscillations of the wind in the equatorial stratosphere at the 30 hPa level. The response of MLT winds to external impacts is different for the 21st and 22nd cycles of solar activity. Effects of geomagnetic storms ( A p > 100) are manifested in the decrease in the eastward prevailing wind and increase in the semidiurnal tide amplitude.
Kazimirovsky Eduard S.
Vergasova Galina V.
No associations
LandOfFree
External impact on wind in the mesosphere/lower thermosphere region does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with External impact on wind in the mesosphere/lower thermosphere region, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and External impact on wind in the mesosphere/lower thermosphere region will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1291244