Arctic lakes show strong decadal trend in earlier spring ice-out.

Except in the northern European study area (51% BUS, 54% BUE), the great majority (76–97% BUS, 69–95% BUE) of lakes showed a negative trend (i.e. earlier dates; Table 1 ).

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With the exception of the central Siberian study area, a relatively small proportion of lakes in each area showed a significant trend for the break-up period (e.g., central Siberia BUS, 33%; northeast Siberia BUS, 5%; see Table 1 ).

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