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Low Latitude Vorticity Injections and the Development of Large Scale Anomalous Circulation Patterns

Robert D. ElliottAerophysics Research Foundation, Santa Barbara, California

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Some general characteristics of synoptic developments in the 500 mb vorticity field are discussed with particular attention devoted to sudden injections of vorticity and to changes in circulation patterns downwind therefrom. Attention is then focused on vorticity injections generated at low latitudes, but not too low to interact in an important way with the middle latitude circulation. Composite maps based upon numerous cases are shown which reveal the development of large scale anomalous patterns in the westerlies during the 3 days subsequent to low latitude vorticity injection. The forecasting implications are discussed.

* The research from which this material is drawn was sponsored by Bureau of Aeronautics, Project AROWA under Contract N189s-99279, 1955.

Some general characteristics of synoptic developments in the 500 mb vorticity field are discussed with particular attention devoted to sudden injections of vorticity and to changes in circulation patterns downwind therefrom. Attention is then focused on vorticity injections generated at low latitudes, but not too low to interact in an important way with the middle latitude circulation. Composite maps based upon numerous cases are shown which reveal the development of large scale anomalous patterns in the westerlies during the 3 days subsequent to low latitude vorticity injection. The forecasting implications are discussed.

* The research from which this material is drawn was sponsored by Bureau of Aeronautics, Project AROWA under Contract N189s-99279, 1955.

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