The relative concept of warm and cold spells of temperature: Methodology and application

  • R. J. McCalla
  • E. E. D. Day
  • H. A. Millward
Article

Summary

The paper differentiates between absolute and relative temperature thresholds when defining warm and cold spells of temperatures. It is suggested that in many applications, notably otudoor recreation and forest management, the relative concept of warm and cold thresholds and associated spells is useful. Two approaches to the definition of relative thresholds are given. The first, proposed by Smith, is found unacceptable. This leads to the presentation of a second involving the mean and standard deviation of maximum daily temperatures. By defining relative thresholds in this manner, it is shown that the thresholds vary according to seasonal fluctuations and are defined according to local temperatures and not based on arbitrary universal concepts. As an illustration of the concept of relative warm and cold spells of temperature, data for Alma, New Brunswick in Fundy National Park are analyzed.

Eine relative Betrachtungsweise warme und kalter Perioden: Methode und Anwendungs-möglichkeiten

Zusammenfassung

Bei der Definition warmer und kalter Perioden wird zwischen absoluten und relativen Temperaturschwellenwerten unterschieden. Bei manchen Anwendungsmöglichkeiten, besonders auf den Gebieten des Sportes und der Forstwirtschaft, durfte das Konzept relativer Schwellenwerte der Temperatur und der dadurch definiewrten Wärme- und Kälteperiodenj von Vorteil sein. Zwei Gesichtspunkte der Definition relativer Schwellenwerte werden diskutiewrt. Der erste, von Smith vorgeschlagen, wird als unzwewckmäßig abgelehnt. Der zweite beinhaltewt die mittleren täglichen Maximaltemperaturen und deren Standardabweichungen. Die auf Grund dieser Parameter definierten relativen Schwellenwerte ändern sich mit der Jahreszeit und hängen von örtlichen Temperaturverhältnissen ab. Der Begriff relativer Wärmew- und Kälteperioden wird an Hand von Daten aus Alma, New Brunswick (Fundy Nationalpark), erläutert.

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Copyright information

© Springer-Verlag 1978

Authors and Affiliations

  • R. J. McCalla
    • 1
  • E. E. D. Day
    • 1
  • H. A. Millward
    • 1
  1. 1.Department of GeographySaint Mary's University HalifaxCanada

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