A METHOD FOR QUANTITATIVE DETERMINATION OF LONG WAVES

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  • 1 University of Chicago
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Abstract

In an effort to find tools for the description of long waves in the upper troposphere in addition to those already available, the total field of motion aloft is divided into a nondivergent basic current and perturbations, following standard hydrodynamical methods of wave treatment. After this division the long waves appear in the form of closed perturbation centers so that latitude is added to longitude as a coordinate for defining long waves. Moreover, since the intensity of these centers is also given, the deepening and filling which they experience, as well as their displacements from day to day can be followed, much as in the case of highs and lows on the sea-level chart. Several other measurements that can be made with use of perturbation charts are also indicated.

Two examples of the suggested technique are given, and some synoptic consequences are also discussed.

Abstract

In an effort to find tools for the description of long waves in the upper troposphere in addition to those already available, the total field of motion aloft is divided into a nondivergent basic current and perturbations, following standard hydrodynamical methods of wave treatment. After this division the long waves appear in the form of closed perturbation centers so that latitude is added to longitude as a coordinate for defining long waves. Moreover, since the intensity of these centers is also given, the deepening and filling which they experience, as well as their displacements from day to day can be followed, much as in the case of highs and lows on the sea-level chart. Several other measurements that can be made with use of perturbation charts are also indicated.

Two examples of the suggested technique are given, and some synoptic consequences are also discussed.

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