Journal
SPACE SCIENCE REVIEWS
Volume 176, Issue 1-4, Pages 343-349Publisher
SPRINGER
DOI: 10.1007/s11214-011-9864-y
Keywords
Cosmic rays; Cosmogenic isotopes; Principal component analysis
Categories
Funding
- Swiss National Science Foundation
- NCCR Climate-Swiss climate research
Ask authors/readers for more resources
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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available