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Synoptic Models of Thickness and Isotherms

Adam KochanskiHeadquarters Air Weather Service, Washington 25, D. C.

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Models of daily thickness patterns were developed for the layers 500–300 mb, 300–200 mb and 200–100 mb. Isotherm models are also given for the 300-, 200-, and 100-mb levels. The models apply to an idealized wave-pattern and show the substantial difference between conditions over contour troughs and those over contour ridges. Tropospheric-type patterns (cold troughs, warm ridges) are predominant in the 500–300-mb layer while stratospheric patterns (warm troughs, cold ridges) prevail in the 200–100-mb layer. The 300–200-mb layer shows a mixed tropospheric and stratospheric type. The presented models are only tentative as limited data were available for their construction. The use of models in analysis and forecasting is discussed.

Models of daily thickness patterns were developed for the layers 500–300 mb, 300–200 mb and 200–100 mb. Isotherm models are also given for the 300-, 200-, and 100-mb levels. The models apply to an idealized wave-pattern and show the substantial difference between conditions over contour troughs and those over contour ridges. Tropospheric-type patterns (cold troughs, warm ridges) are predominant in the 500–300-mb layer while stratospheric patterns (warm troughs, cold ridges) prevail in the 200–100-mb layer. The 300–200-mb layer shows a mixed tropospheric and stratospheric type. The presented models are only tentative as limited data were available for their construction. The use of models in analysis and forecasting is discussed.

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