Physics
Scientific paper
Aug 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983phdt.........7j&link_type=abstract
Ph.D. Thesis Harvard Univ., Cambridge, MA.
Physics
Heating, Linear Equations, Northern Hemisphere, Planetary Waves, Sensitivity, Topography, Atmospheric Models, Temperature Gradients, Variations, Wavelengths
Scientific paper
This thesis investigates the causation and sensitivity of the Northern Hemisphere winter quasi-stationary planetary waves. The model used is a linearization about observed zonal wind and temperature fields. The linearized primitive equations are solved separately for each wavenumber on a fine (1.5 deg horizontal by 1 kilometer vertical) grid. The model's lid is placed high enough so that spurious energy reflections are made negligible. Realistic topography and heating are used to force the model. Some idealized heatings are also studied. It is found that the model produces an acceptably realistic response. The chief causation of this response is topographic forcing. The interannual variability of the waves is found to be explained by (a) the variation of the topographic response due to changes in the zonal state and to a lesser extent, by (b) the variability of the heating field. However, the sensitivity of the response is found to be too small to explain the causation of large amplitude persistent anomalies.
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