关键词: 网络, 网络

Abstract: In order to grasp the variation characteristics of the date spring temperature above critical temperature stably, to make preparation for the forecast. Based on the daily mean temperature data of 53 observational stations in Liaoning during 1961-2010, we calculated the dates on which Liaoning spring temperatures above 5℃ and 8℃ stably. Then the spatial and temporal features of the dates on which Liaoning spring temperatures above 5℃ and 8℃ stably were analyzed. Results showed that: the first pattern of EOF showed that the abnormal of the dates are consistent; the dates of the temperature above 5℃ and 8℃ stably in spring in Liaoning Province appeared earlier and earlier during 1961 to 2010; the standard deviation of the dates are uniform; the mutation points of the dates on which Liaoning spring temperatures above 5℃ and 8℃ stably are 1981 and 1993; the cyclic characteristics of the dates on which Liaoning spring temperatures above 5℃ and 8℃ stably are 4 a and 2 a; the dates on which Liaoning spring temperatures above 5℃ and 8℃ stably showed obvious area feature.