Response of the mesopause region dynamics to the February 2001 stratospheric warming

Details Response of the mesopause region dynamics to the February 2001 stratospheric warming Response of the mesopause region dynamics to the February 2001 stratospheric warming

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jastp..65..843j&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 65, Issue 7, p. 843-855.

Physics

18

Mesosphere/Lower Thermosphere, Stratospheric Warming, Radar Measurements, Middle Atmosphere

Scientific paper

The response of the mesosphere/lower-thermosphere (MLT) region to a major stratospheric warming in Europe during winter 2000/2001 has been investigated using mesopause-region winds measured by meteor radar or the LF-D1 method over three stations (Castle Eaton, 52°N Collm, 52°N and Esrange 68°N). The vertical wind structure measured over the three sites, and its time evolution, are found to be quite similar despite the different techniques used in the measurements. The effects of stratospheric warming are very clear, and are similar over both the mid-latitude and high-latitude sites. The warming resulted in a reversal of both the zonal and meridional wind. In the zonal component, this reversal was apparently associated with a planetary-wave oscillation with a period of ~10 days. The effect was most conspicuous in the vertical prevailing wind gradients. The mesopause-region effects thus seem to be the results of a superposition of an intensifying planetary wave and a slow overall decrease in the strength of the zonal prevailing winds.

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