Computer Science
Scientific paper
May 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984maph...10...79l&link_type=abstract
In International Council of Scientific Unions Middle Atmosphere Program. Handbook for MAP, Vol. 10 p 79-85 (SEE N85-20450 11-4
Computer Science
Middle Atmosphere, Planetary Waves, Stratosphere, Wave Propagation, Winter, Annual Variations, Atmospheric Circulation, Synoptic Meteorology, Temperature Gradients
Scientific paper
The Middle Atmosphere is coupled to the troposphere during winter because planetary scale waves can propagate upwards if the prevailing winds are from the west. It is during this time of the year that the well-known midwinter disturbances are observed which ultimately affect the whole of the Middle Atmosphere. The mechanism of these disturbances is not completely understood. The large-scale circulation features up to the upper mesosphere are investigated to demonstrate the synoptic-scale behavior of the midwinter disturbances. Ground-based and satellite observations are combined. The interannual variability of the disturbances is discussed briefly. It is shown that the QBO (Quasi Biennial Oscillation) of the equatorial stratosphere appears to modulate the planetary waves during the northern winters, in the troposphere as well as in the Middle Atmosphere.
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