期刊
SPACE SCIENCE REVIEWS
卷 176, 期 1-4, 页码 343-349出版社
SPRINGER
DOI: 10.1007/s11214-011-9864-y
关键词
Cosmic rays; Cosmogenic isotopes; Principal component analysis
资金
- Swiss National Science Foundation
- NCCR Climate-Swiss climate research
Cosmogenic radionuclides are more and more used in solar activity reconstructions. However, the cosmogenic radionuclide signal also contains a climate component. It is therefore crucial to eliminate the climate information to allow a better interpretation of the reconstructed solar activity indices. In this paper the method of principal components is applied to Be-10 data from two ice cores from opposite hemispheres as well as to C-14 data from tree rings. The analysis shows that these records are dominated by a common signal which explains about 80% of the variance on multi decadal to multi millennial time scales, reflecting their common production rate. The second and third components are significantly different for C-14 and Be-10. They are interpreted as system effects introduced by the transport of Be-10 and C-14 from the atmosphere where they are produced to the respective natural archives where they are stored. Principal component analysis improves significantly extraction of the production signal from the cosmogenic isotope data series, which is more appropriate for astrophysical and terrestrial studies.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据