近52年潮州市日照时数的气候变化规律

Climatic Variability of Sunshine Hours Change of Chaozhou During 52 Years

为了研究潮州市日照时数变化对本区域内的作物生长、作物品质和作物产量的影响,利用潮州市气象观测站1960—2011年逐月的日照时数资料进行统计分析,采用气候倾向率、距平百分率、滑动t检验、小波分析等方法来分析52年来潮州市日照时数的变化规律。结果表明,近52年来潮州市日照时数在20世纪60年代和90年代到21世纪初偏多,20世纪80年代左右偏少;日照时数变化最大的季节为秋季,最小的是夏季;突变检验显示,20世纪90年代日照时数出现了突发性的上升,突变点出现在1994年,21世纪初开始又出现了明显的下降,突变点出现在2004年;通过对全年和季节日照时数的周期分析,在比较显著的时间尺度上日照时数目前处于偏多的时期。

In order to research the influence of the change of sunshine duration in Chaozhou City on the crop growth, crop quality and crop yield of the region, based on the Chaozhou meteorological data, including sunshine hours and total cloud amount, low-level cloud amount, vapor pressure and relative humidity of meteorological stations from 1960 to 2011, the characteristics of sunshine hours change in Chaozhou had been studied with the methods of percentage of sunshine hours anomalies, moving t test, and wavelet analysis. The result indicated that, in terms of Chaozhou, the sunshine hours of 1990s, the earlier of this century and 1960s was the most of the sunshine hours from 1960 to 2011, 1980s was the least. The greatest amplitude season was autumn, the least was summer. Mutation test showed that the age 1990s sunshine hours increased rapidly, mutations occurred in 1994, the sunshine hours the earlier of this century reduced rapidly, mutations occurred in 2004. According to the periods of annum and seasonal sunshine hours change, it would be mainly in the more period for the more significant time scale.