Chinese sunspot drawings and their digitization–(Ⅲ)quasi-biennial oscillation of the hand-drawn sunspot records  

作　　者：Miao Wan Shu-Guang Zeng Sheng Zheng Gang-Hua Lin 

机构地区：[1]College of Science,China Three Gorges University,Yichang 443002,China [2]National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China

出　　处：《Research in Astronomy and Astrophysics》2020年第11期354-360,共7页天文和天体物理学研究（英文版）

基　　金：the National Natural Science Foundation of China(Grant Nos.U1731124,U1531247,11427901 and U1531247);the special foundation work of the Ministry of Science and Technology of China(Grant No.2014FY120300);the 13th Five-year Informatization Plan of Chinese Academy of Sciences(Grant No.XXH13505-04)。

摘　　要：Quasi-biennial Oscillations(QBOs)of the Sun have a significant meaning as a benchmark of solar cycle,not only for understanding the dynamo action but also in terms of space weather prediction.In this paper,the hand-drawn sunspot images recorded from the Purple Mountain Observatory are used to investigate the solar QBOs and the Gnevyshev gap of the sunspot relative numbers(Rs)and group sunspot numbers(Rg)during the period 1954–2011.The main results are as follows:(1)both the Rs and Rg exhibit similar periods including the 22-year magnetic cycle,the 11-year Schwabe cycle,and the QBOs modes;(2)the reconstructed QBOs of both data sets exhibit coherent behavior and tend to have a high amplitude during the maximum phase of each solar cycle;(3)the Gnevyshev gap is produced by the superposition of the QBOs and the 11-year Schwabe cycle,and the Rs is better to study the variation of the Gnevyshev gap rather than the Rg.

关 键 词：SUN activity SUN SUNSPOT SUN quasi-biennial oscillation 

分 类 号：P182.41[天文地球—天文学]