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A Statistical Analysis of Trends for Warm and Cold Spells in Uppsala by Means of Counts
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Mathematics, Applied Mathematics and Statistics.
2015 (English)In: Geografiska Annaler. Series A, Physical Geography, ISSN 0435-3676, E-ISSN 1468-0459, Vol. 97, no 3, 431-436 p.Article in journal (Refereed) Published
Abstract [en]

Statistical studies of extremes are of interest in the climatic sciences, in particular trends of periods of unusually warm or cold weather, which could be labelled warm and cold spells, respectively. We study the yearly number of spells in Uppsala, Sweden which from a data-analytic point of view truly are counts, and employ theory and methods from the field of regression models for counts. A possible trend for the period 1840-2012 was investigated. The trend for warm spells is positive and demonstrated to be larger in magnitude compared with the one for cold spells, and is found to be statistically significant. The methodology could be extended to analyse other climate indicators.

Place, publisher, year, edition, pages
2015. Vol. 97, no 3, 431-436 p.
Keyword [en]
warm spell, cold spell, trend, Poisson regression
National Category
URN: urn:nbn:se:uu:diva-264064DOI: 10.1111/geoa.12083ISI: 000361234200001OAI: oai:DiVA.org:uu-264064DiVA: diva2:858938
Available from: 2015-10-05 Created: 2015-10-05 Last updated: 2015-12-02Bibliographically approved

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Ryden, Jesper
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Applied Mathematics and Statistics
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