The winter anomaly and sudden stratospheric warmings

Details The winter anomaly and sudden stratospheric warmings The winter anomaly and sudden stratospheric warmings

Aug 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984ge%26ae..24..592l&link_type=abstract

Geomagnetizm i Aeronomiia (ISSN 0016-7940), vol. 24, July-Aug. 1984, p. 592-597. In Russian.

Computer Science

4

Atmospheric Temperature, Ionospheric Electron Density, Stratosphere, Stratospheric Warming, Thermosphere, Anomalies, Electromagnetic Absorption, Wind Direction, Winds Aloft, Winter

Scientific paper

Large-scale stratospheric warmings are examined on the basis of 22-year measurements of radio-wave absorption at the Panska Ves observatory. It is shown that these warmings, accompanied by the reversal of wind direction in the lower thermosphere, lead not to an increase but to a decrease in the radio-wave absorption in the lower ionosphere, i.e., to the disappearance of the winter anomaly. It is concluded that the absorption decrease is connected not only with cooling in the mesopause region but also with a total change in the dynamic conditions of the lower ionosphere. The behavior of the winter anomaly in the 1979-1980 and 1981-1982 periods is examined in detail.

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