Abstract: Regionalization based on the elements of climate using a clustering method is animportant approach to identify climate zones.A scale-space clustering method is proposed formulti-scale regionalization of sea surface temperatures from the Pacific Ocean.First,a modi-fied clustering method is developed based on scale-space theory for climate time sequences.Second,the method is used to regionalize the sea surface temperature of the Pacific Ocean.The results obtained demonstrate that the proposed method is able to reconstruct the climateindices accurately without input parameters,and is more effective and advantageous thanother approaches.