Millennial-band climate spectrum resolved and linked to centennial-scale solar cycles

被引:58
|
作者
Clemens, SC [1 ]
机构
[1] Brown Univ, Providence, RI 02912 USA
基金
美国国家科学基金会;
关键词
D O I
10.1016/j.quascirev.2004.10.015
中图分类号
P9 [自然地理学];
学科分类号
0705 ; 070501 ;
摘要
Spectral comparison of the Hulu Cave, GRIP, and GISP2 delta O-18 records suggests that the single dominant period centered on 1470 yr in the GISP2 spectrum, the so-called '1500-yr cycle', is an artifact of the age model. The Th-230-dated Hulu Cave record indicates a millennial-band spectrum with a weak spectral peak near this period flanked by two stronger peaks centered on 1667 and 1190-yr, similar to the GRIP delta O-18 record. All three millennial-band cycles may derive from heterodynes of centennial-band solar cycles as observed in the Holocene record of atmospheric C-14 production. This suggests a link between centennial-scale solar variability and abrupt climate change at the millennial time scale. (c) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码:521 / 531
页数:11
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