Journal
THEORETICAL AND APPLIED CLIMATOLOGY
Volume 107, Issue 3-4, Pages 505-510Publisher
SPRINGER WIEN
DOI: 10.1007/s00704-011-0495-8
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- Ministry of Science of Serbia
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Many areas of society are susceptible to the effects of extreme temperatures. Without an adequate definition of what constitutes heat and cold waves, it is impossible to assess either their changes in the past or their possible consequences for the future. The Intergovernmental Panel on Climate Change recommended criteria for heat wave duration indexes based on two arbitrarily defined constants. The principal weakness of this approach is that it does not yield comparable results for different geographical locations. This paper remedies the current lack of a meteorologically based definition of heat and cold waves and offers a preliminary test of its performance. Having previously shown that maximum daily temperature values follow normal frequency distribution, we derive statistical thresholds (e.g., below and above normal) from that distribution. These thresholds are thus climate specific and their change can be compared across geographical locations. These criteria are then tested on the homogeneous time series of maximum daily temperature observed for the period 1961-2008 with respect to three different geographical locations. The results obtained show an increase in the frequency of heat waves for the period 1991-2008 in comparison with the normal climatological period 1961-1990.
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