摘要
利用db10小波函数,对太阳活动和杉木年轮宽度的相对指数序列进行小波分析,得到在不同分辨率上太阳活动的周期有11a,6a,其中11a周期是主周期。在逼近空间上,观察到太阳活动处于上升阶段。杉木年轮宽度指数有9～12a左右的生长周期和5a的生长周期,其中12a周期是主周期。从逼近信息看,23a来杉木年轮宽度指数随时间变化先降,随后略有上升之势。
The relationship between solar activity and the width of Chinese fir growth-rings has been analysed on the basis of wavelength. There are two periods, 11 years and 6 years, for solar activity,and two periods, 9～12 years, and 5～6 years, for the width of Chinese fir growth-rings in Fujian Province. The results of the study indicate a negative correlation between width of Chinese fir growth-rings and solar activity.
出处
《水土保持通报》
CSCD
北大核心
2004年第3期21-23,共3页
Bulletin of Soil and Water Conservation
关键词
小波分析
太阳活动
杉木年轮
wavelength analysis
solar activity
Chinese fir growth-ring
