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Trends in first ice-on date for coastal rivers in Maine. Loess regression lines are based on a 35-year weighting window. The Sheepscot River (round dotted line) is trending towards a later first fall ice-on date in the recent century. Figure is from Dudley and Hodgkins (2002).


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in last ice-off date for coastal rivers in Maine. Loess regression lines are based on a 35-year weighting window. The Sheepscot River (round dotted line) is trending toward earlier last spring ice-off date with a net change in last ice-off date of 12 days within 62 years (1939-2000) of record. Figure is from Dudley and Hodgkins (2002).


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Trends in total number of days of ice effect for coastal rivers in Maine. Loess regression lines are based on a 35-year weighting window. According to Dudley and Hodgkins (2002), the trend toward fewer days of ice effect is statistically significant at all rivers except for the Sheepscot River. This figure is from Dudley and Hodgkins (2002).