CAJ | 학술논문

利用小波分析方法，分析了榆林地区1951～2010年降水量的变化趋势、周期特征及其与太阳黑子数的关系。结果表明：夏季降水量最多，冬季降水量最少；60年来降水量呈减少趋势；榆林年降水量的变化主要存在2～3、7、17和22年的周期，其中以7年周期最明显；春季降水量的主周期为5～7、16～22年；夏季降水量主要存在6～8、19年的周期；秋季降水量主要存在5～7年的周期；冬季降水量主要存在16、12年的周期。太阳黑子数的变化存在9年的周期；太阳黑子数与年降水量、春季降水量的关系较密切，与秋季、冬季降水量的关系不大。
이용소파분석방법，분석료유임지구1951～2010년강수량적변화추세、주기특정급기여태양흑자수적관계。결과표명：하계강수량최다，동계강수량최소；60년래강수량정감소추세；유림년강수량적변화주요존재2～3、7、17화22년적주기，기중이7년주기최명현；춘계강수량적주주기위5～7、16～22년；하계강수량주요존재6～8、19년적주기；추계강수량주요존재5～7년적주기；동계강수량주요존재16、12년적주기。태양흑자수적변화존재9년적주기；태양흑자수여년강수량、춘계강수량적관계교밀절，여추계、동계강수량적관계불대。
In this paper , the method of wavelet analysis was used to study the variation trend and periodic features of precipita -tion in Yulin area of Shaanxi province during 1951~2010 , and the method of simple linear regression was used to analyze the rela-tionship between the precipitation and the number of sunspots .The results indicated that the summer precipitation was the most in a year, while the winter precipitation was minimal .The precipitation in Yulin area showed a decreasing trend in the past 60 years.The main periods of 2~3a, 7a, 17a, and 22a existed in variation in the annual precipitation of Yulin , and the 7a period was the most obvious.The main periods of spring precipitation were 5~7a and 16~22a.The main periods of summer precipitation were 6~8a and 19a.The main period of 5~7a existed in autumn precipitation .The change in winter precipitation mainly included two periods:16a and 12a.The 9a period existed in change in the number of sunspots .The number of sunspots was closely related with the annual pre-cipitation and spring precipitation , but was hardly related with the autumn precipitation and winter precipitation .