Summary
From a study of five cases of pronounced fronts in the upper troposphere, it is concluded that the “waterspout” model offers the most satisfactory solution to the problem of connecting frontal boundaries and tropopauses. Composite cross sections of temperature, potential temperature, normal wind component and potential vorticity are presented for the five cases. On the basis of the potential vorticity measurements it is suggested that the most likely explanation for the formation of the high-level front is a folding of the tropopause.
Zusammenfassung
Auf Grund einer Untersuchung von fünf Fällen ausgesprochener Fronten in der höheren Troposphäre wird der Schluß gezogen, daß die „Wasserhosen”-Vorstellung am besten den Zusammenhang zwischen Fronten und Tropopausen darstellt. Kombinierte Querschnitte von Temperatur, potentieller Temperatur, normaler Windkomponente und potentieller Vorticity werden für die fünf Fälle vorgelegt. Auf Grund der Bestimmungen der potentiellen Vorticity wird dargelegt, daß die wahrscheinlichste Erklärung für die Entstehung einer Front in der Höhe in der Annahme einer Faltung der Tropopause besteht.
Résumé
En se fondant sur cinq cas de fronts très nets de la haute troposphère, les auteurs concluent que le schéma de trombe constitue la meilleure solution pour représenter la liaison entre zones frontales et tropopause. Ils donnent des profils combinés de température, de température potentielle, de composantes normales du vent et de vorticity potentielle pour les cinq cas. Ils montrent à l'aide de mesures de la vorticity potentielle que l'explication la plus probable de la formation d'un front en altitude consiste à admettre un plissement de la tropopause.
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References
Berggren, R.: The Distribution of Temperature and Wind Connected with Active Tropical Air in the Higher Troposphere and Some Remarks Concerning Clear Air Turbulence at High Altitude. Tellus4, 43–54 (1952).
—: On Temperature Frequency Distribution in the Free Atmosphere and a Proposed Model for Frontal Analysis. Tellus5, 95–101 (1953).
Bjerknes, J., andE. Palmén: Investigations of Selected European Cyclones by Means of Serial Ascents. Geofys. Publ.12, 62 (1937).
Bjerknes, V.: Dynamic Meteorology and Hydrography. Part II —Kinetmatics. Washington, Carnegie Institution, 175 pp. (1911).
Dickson, R. R.: A Case Study of the Jet Stream. Bull. Amer. Met. Soc.36, 195–204 (1955).
Endlich, R.: Flight Aspects of Jet Streams and Mountain Waves, Part I. Abstract in Bull. Amer. Met. Soc.37, 539 (1956).
Kleinschmidt, E.: Die Entstehung einer Höhenzyklone über Nordamerika. Tellus7, 96–111 (1955).
Matthewman, A. G.: Meteorological Office Discussion. Frontal Analysis in the Higher Troposphere and the Lower Stratosphere. Met. Mag.83, 87 (1954).
Newton, C. W.: Frontogenesis and Frontolysis as a Three-Dimensional Process. J. Met.11, 449–461 (1954).
Palmén, E.: Aerologische Untersuchungen der atmosphärischen Störungen. Mitt. met. Inst. Univ. Helsingf. No. 25 (1933).
—: On the Distribution of Temperature and Wind in the Upper Westerlies. J. Met.5, 20–27 (1948).
Palmén, E.: Vertical Circulation and Release of Kinetic Energy during the Development of Hurricane Hazel into an Extratropical Storm. Studies in Weather Analysis and Forecasting. Final Report under Contract AF 19 (604)-1293, University of Chicago (1957).
—, andK. M. Nagler: The Formation and Structure of a Largescale Disturbance in the Westerlies. J. Met.6, 227–242 (1949).
—, andC. W. Newton: A Study of the Mean Wind and Temperature Distribution in the Vicinity of the Polar Front in Winter. J. Met.5, 220–226 (1948).
Reed, R. J.: A Study of a Characteristic Type of Upper-Level Frontogenesis. J. Met.12, 226–237 (1955).
Riehl, H.: Correspondence. J. Met.13, 313–314 (1956).
—, andH. Maynard: Exploration of the Jet Stream by Aircraft during the 1952–1953 Winter. J. Met.12, 26–35 (1955).
Sawyer, J. S.: Day-to-day Variations in the Tropopause. Geophys. Mem.11, 40 (1954).
—: The Free Atmosphere in the Vicinity of Fronts. Geophys. Mem.12, 24 (1955).
Staley, D. O.: Evaluation of the Physical Processes Occurring at and near the Tropopause. Unpublished Thesis. Seattle, University of Washington, 121 pp. (1956).
Van Mieghem, J.: Analyse aérologique d'un front froid remarquable. Mém. Inst. Mét. Belg.VII, 85 (1937).
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Contribution No. 37, Department of Meteorology and Climatology. —The research reported in this article has been supported by the Geophysical Research Directorate, Air Force Cambridge Research Center, under Contract No. AF 19 (604)-1811.
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Reed, R.J., Danielsen, E.F. Fronts in the vicinity of the tropopause. Arch. Met. Geoph. Biokl. A. 11, 1–17 (1958). https://doi.org/10.1007/BF02247637
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DOI: https://doi.org/10.1007/BF02247637