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Observed changes in extreme temperatures over Spain during 1957-2002 using Weather Types

Journal: Revista de Climatología
Year: 2009   Volume: 9
Initial page: 45   Last page: 61
Status: Published
In this status since: 22 Dec 2009
PDF file: 2009_bermejo_RCLI.pdf

The aim of this paper is to identify and analyze the daily variability of observed changes in the extreme temperatures
in relation to the atmospheric circulation. In order to carry this out, a joint probabilistic analysis of
Weather Types (WTs) and the corresponding surface observations has been performed, comparing daily surface
observations of extreme temperatures, in two different periods of time (1957-1979 and 1980-2002) over mainland
Spain and the Balearic Islands. The results show that there were significant changes in the extreme temperatures
between the two periods of study; moreover, these changes were heterogeneous in space, time and WT. Finally,
we have noticed that these observed alterations were more related to changes in the extreme temperatures of the
corresponding WTs than to changes in the occurrence probability of the WTs.

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