摘要
利用夏津县气象局1961—2016年日照气象资料,采用线性趋势、累计距平法和谱分析方法对年日照时数与四季日照时数变化特征进行计算分析。结果表明,夏津县日照时数呈显著减少趋势,平均每10年减少77.4 h,且通过了0.001的显著性检验。春、夏、秋、冬四季的日照时数均呈下降趋势,平均每10年分别减少6.3、24.3、23.0、21.8 h,夏季、秋季与冬季下降趋势极显著,通过了0.001的显著性检验;春季下降趋势不显著,未通过0.05的显著性检验。1995—1997年是年日照时数和四季日照时数由正距平到负距平的转折年份;年日照时数和夏季日照时数存在11年的周期,通过了95%的信度检验。
Based on the sunshine duration data of Xiaj in Meteorological Bureau from 1961 to 2016,the change character is t ics of annual and seasonal sunshine duration were calculated and analyzed,by using linear trend analysis,accumulative anomaly method and spectrum analysis. The results indicated that the annual sunshine duration change showed a significant decreasing tendency with a decadal decreasing rate of 77.4 h, which passed the significance test of 0.001. The sunshine duration changes of spring,summer,autumn and winter all showed decreasing tendencies,the decadal decreasing rates were 6.3 h, 24.3 h, 23.0 h and 21.8 h,respectively. The decreasing tendencies of summer,autumn and winter were extremely significant,which passed the significance test of 0.001. The decreasing tendency of spring was not significant,which didn,t pass the significance test of 0.05. The annual and seasonal sunshine duration changed from positive anomaly to negative anomaly during 1995 to 1997. There was an 11-year period for both annual and summer sunshine duration,which passed the confidence level of 95%.
出处
《现代农业科技》
2017年第21期210-211,213,共3页
Modern Agricultural Science and Technology
