Abstract
THE atmospheric angular momentum generated at the earth's surface between latitudes ± ϕ must, over a long period, be balanced by an equivalent outflow of angular momentum across these parallels. It was argued by Jeffreys1 that the main agents of this efflux are rotations of cyclonic dimensions lying side by side, at least in the latitudes of the prevailing surface westerlies. Extended to all latitudes, this view encounters the difficulty that the maximal flux must occur across the belts of minimal disturbance around lat. 30°–35° N. and S.; nevertheless, it is widely held that this is effected by a marked horizontal asymmetry in the anticyclones comprising the high-pressure belt.
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References
Jeffreys, H., Quart. J. Roy. Met. Soc., 52, 85 (1926).
Rossby, C. G., “Climate and Man”, U.S. Dept. Agric., 599 (1941).
Starr, V. P., J. Meteorology, 5, 39 (1948).
Jeffreys, H., Proc. Internat. Union Geod. and Geophys. (Lisbon), 219 (1933).
Namias, J., “Extended Forecasting by Mean Circulation Methods”, U.S. Weather Bureau (1947).
Priestley, C. H. B., Quart. J. Roy. Met. Soc., 75, 28 (1949).
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PRIESTLEY, C. Flow of Momentum and Mass across the High-Pressure Belt of the Earth's Atmosphere. Nature 165, 855–856 (1950). https://doi.org/10.1038/165855b0
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DOI: https://doi.org/10.1038/165855b0
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