Mathematics
Scientific paper
Dec 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icsu...18q....c&link_type=abstract
In International Council of Scientific Unions Handbook for MAP, Vol. 18 4 p (SEE N86-27719 18-46)
Mathematics
Atmospheric Circulation, Mesosphere, Periodic Variations, Planetary Waves, Winds Aloft, Atmospheric Models, Mathematical Models, Momentum, Summer, Zonal Flow (Meteorology)
Scientific paper
Studies of the quasi-2-day wave show that it is a summertime phenomenon. Long-term measurement of the winds in the 60 to 100 km height range at Adelaide show that the wave appears in the late December but that the peak amplitudes are not reached until mid-January. In the summer of 1983 to 1984 the main phase of the wave appeared as a pulse in mid-January which lasted about 7 cycles (14 days). Little or no amplification with height was observed; peak amplitudes were about 60 m/s for the meridional and 20 m/s for the zonal component. Coincident with the onset of the pulse, a temporary but substantial change occurred throughout a deep layer of the upper mesosphere over a period of about 3 days. A change of more than 10 m/s occurred in the northward flow while the change in the zonal flow (about 30 m/s westward) actually caused a reversal of the prevailing zonal circulation.
Craig R. L.
Plumb Alan R.
Vincent Anthony R.
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