Theoretical and Applied Climatology

, Volume 38, Issue 2, pp 57–68 | Cite as

Use of a synoptic classification scheme to define seasons

  • R. A. Pielke
  • M. Garstang
  • C. Lindsey
  • J. Gusdorf
Article

Summary

This paper presents a synoptic surface weather map classification scheme, and uses the categorization technique to meteorologically define seasons. Winter is defined as that period of the year in which a location is most frequently poleward of the polar front, while summer occurs when the site is most commonly equatoward. Fall and Spring are the transition periods when, respectively, increasingly more frequent and less frequent periods of time poleward of the polar front occur.

Using 10 years of data, the application of this definition of seasons to the Gulf and Atlantic coasts of the United States is presented. While the frequency of the specific types of major synoptic weather features varied with latitude, the meteorological definitions of season are comparatively invariant with latitude (differing by no more than a month) for this geographic area. Using the meteorological definitions of season, the average winter for this region occurs from late October or early November to late March or early April. Summer is from late May to early June until late August or late September.

Keywords

Classification Scheme Atlantic Coast Polar Front Categorization Technique Surface Weather 

Zusammenfassung

Diese Arbeit stellt ein synoptisches Klassifikationsschema nach Bodenwetterkarten vor, das eine Kategorisierungstechnik verwendet, um die Jahreszeiten meteorologisch zu definieren. Der Winter ist als die Periode des Jahres festgelegt, in der ein Ort meist polwärts der Polarfront, während der Sommer jene Periode ist, in der er äquatorwärts der Polarfront liegt. Herbst und Frühjahr sind die Übergangsperioden, in denen zunehmend häufigere bzw. weniger häufige Abschnitte polwärts der Polarfront vorkommen.

Die Anwendung dieser Jahreszeitendefinition wird mit Hilfe der Daten aus 10 Jahren für die Atlantik- und Golfküste der Vereinigten Staaten vorgestellt. Während die Häufigkeiten bestimmter Wetterlagen mit der geographischen Breite schwanken, erwies sich diese meteorologische Jahreszeitendefinition demgegenüber als vergleichbar invariant (mit einem maximalen Unterschied von einem Monat) innerhalb des ausgewählten Gebiets. Der so definierte Winter dieser Region beginnt zwischen Ende Oktober und Anfang November und dauert bis Ende März bzw. Anfang April. Sommer ist zwischen Ende Mai/Anfang Juni und Ende August/Ende September.

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References

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Copyright information

© Springer-Verlag 1987

Authors and Affiliations

  • R. A. Pielke
    • 1
  • M. Garstang
    • 2
  • C. Lindsey
    • 3
  • J. Gusdorf
    • 4
  1. 1.Department of Atmospheric ScienceColorado State UniversityFort CollinsUSA
  2. 2.Department of Environmental SciencesUniversity of VirginiaCharlottesvilleUSA
  3. 3.Battelle Pacific Northwest LaboratoriesRichlandUSA
  4. 4.Oboe Engineering LimitedOttawa, OntarioCanada

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