Possible effect of solar activity on variation of the tree-rings of a 500 a platycladus orientalis at the Mausoleum of Emperor Huang

• 来源期刊: 中国科学G辑(英文版)
• 年，卷（期）: 2009,（4）
• 页码范围: 631-639
• 页数: 9页
• 语种: 英文
• DOI: 10.1007/s11433-009-0048-7

摘要

The variation of the tree-ring's index of a platycladus orientalie at the Mausoleum of Emperor Huang and of a long series of sunspots relative number during AD1470--1974 are analyzed by using the wavelet power spectrum method, and their variation characters are also discussed. It is determined that the tree-ring's variation has cycles of approximate 2--7, 11, 93 and 150 a. Two data series are used for analyzing sunspot relative number (SSN) variation. First, the analysis of the annual average SSN during AD1700--1974 proved that variation cycles are about 11, 50, and 93 a; then, the data during AD1465--1975 obtained from the decadal average SSN train over 7000 a reconstructed on the geo-magnetic data is analyzed and its variation cycles are about 50, 90, and 160 a. Besides the tree-rings cycle of 2--7 a is commonly considered to be related to ENSO, while 11 a cycle is related to solar Schwabe cycle; In addition, it is possible that the cycles of 90 and150 a are likely to be related to solar Gleissberg cycle and Suess cycle. The correlations between them are possibly due to the effect of solar activity on the climate and additionally on the tree's growth.