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Indicator Assessment Lake and river ice cover (CLIM 020) - Assessment published Sep 2008
The duration of ice cover in the northern hemisphere has shortened at a mean rate of 12 days per century, resulting from an average 5.7 days later ice cover and 6.3 days earlier ice break-up.  The strongest trends in northern Europe are in the timing of ice break-up which is consistent with the fastest warming in winter and spring.  The ice cover of lakes with mean winter temperature close to zero is much more dependent on temperature change than lakes in colder regions such as northern Scandinavia.
Located in Data and maps Indicators Lake and river ice cover
Indicator Assessment Lake and river ice cover (CLIM 020) - Assessment published Nov 2012
The existence of ice cover and the timing of ice break-up influence the vertical mixing of lakes and are therefore of critical ecological importance. The duration of ice cover on European lakes and rivers has shortened at a mean rate of 12 days per century over the last 150–200 years. A further decrease in the duration of lake ice cover is projected with projected climate change.
Located in Data and maps Indicators Lake and river ice cover
EEAFigure Ice break-up dates from selected European lakes and rivers (1835-2006) and the North Atlantic Oscillation (NAO) index for winter 1864-2006
Time series of ice break-up dates from selected European lakes and rivers. Data smoothed with a 7-year moving average
Located in Data and maps Maps and graphs
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