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Abstract
A correlation is found between the June warmth index and the March surface albedo at Tartu-Tõravere Actinometric Station for the period 1953—1992. To investigate the relationships between surface albedo and spring heat accumulation over larger areas, ISCCP C2-level data for the period 1984—1990 are used. Based on the concept of surface thermal forcing, a possibility to estimate spring heat accumulation is shown. At 45—60°N in Europe, the tendencies in heat accumulation during spring of an extremal year may be predicted by surface albedo in February or March.