Aspects of Intensification and Motion of Wintertime 500-mb Patterns

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  • 1 Department of Meteorology, Mass. Inst, of Technology, Cambridge
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The results of an empirical study of 500-mb patterns are presented. It is shown that the prediction of the 24-hr and 48-hr intensification or weakening of troughs and ridges can be aided by a consideration of upstream changes. Qualitative rules for the prediction of a 24-hr change in the speed of troughs and ridges are included. Finally a climatological summary is presented of intensification, weakening and speed of troughs and ridges.

1 Majors G. Arnold, J. H. Ainsworth and Captains F. E. Courtney and W. Lewis, Air Weather Service.

The results of an empirical study of 500-mb patterns are presented. It is shown that the prediction of the 24-hr and 48-hr intensification or weakening of troughs and ridges can be aided by a consideration of upstream changes. Qualitative rules for the prediction of a 24-hr change in the speed of troughs and ridges are included. Finally a climatological summary is presented of intensification, weakening and speed of troughs and ridges.

1 Majors G. Arnold, J. H. Ainsworth and Captains F. E. Courtney and W. Lewis, Air Weather Service.

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