Observed changes in warm spells indices 1976-2010 (in days per decade)

Figure expired Created 04 Apr 2011 Published 23 May 2011 Last modified 26 Aug 2017
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How to read the map: Warm spell duration index is defined as a period (number of days) of six consecutive days with the mean daily temperature exceeding 90th percentile of the baseline temperature (average daily temperature the 1961-1990 period). Stations with negative trends are blue and stations with positive trends are in red colour. When stations are in green colour trends are not statistically significant at 25% level.

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European data

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The circle size depicts the magnitude of change per decade.
Geographical coverage note: Europe

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