摘要
利用石岛气象站1981—2010年逐月日照时数资料,采用常规统计方法和小波变换分析日照的分布情况和变化规律。结果表明,石岛日照时数存在多时间尺度的周期变化特征：在年代际变化中存在着3a和18a特征时间尺度;春季在1997年前存在16~18a、5~7a的变化,之后存在着4~5a的变化;夏季整体存在着8~11a的周期变化,在1987年前为5~7a,1988—2003年为8~10a,2003之后存在着1个6a左右的周期;秋季在1986年以前存在着6~7a的周期,之后周期基本在2~3a;冬季存在着14~16a和5~7a周期变化。石岛日照时数下降的趋势十分明显,特别是近10a。未来短期内将处于日照时数偏少期。
Using the monthly sunshine hours data of Shidao Area in 1981—2010, the conventional statistic methods and wavelet transform to analyze the distribution of sunshine and change rule. The results show that the Shidao Area sunshine time exist periodic variation characteristics of multiple time scales： there are 3 a in decadal variability and 18 a characteristic time scales？ the 16-18 a existed more than 1997 years ago, 5-7 a change,then there is 4-5 a change in Spring？ there are 8-11 a cycle of change, in 1987 years ago for 5-7 a, 1988—2003 for 8-10. A, 2003 after there is a cycle of about 6 a in whole Summer？ there are 6-7 a cycle after cycle in 2-3 a basic before 1986 in Autumn？ there are 14-16 a and 5-7 a cycle in Winter. Shidao sunshine time downward trend obviously, especially in recent 10 a in Winter. The future will be in the midst of a sunshine hours less in the short term.
出处
《生物灾害科学》
2016年第1期62-66,共5页
Biological Disaster Science
关键词
日照时数
小波分析
周期变化
sunshine hour
wavelet analysis
periodic change
