NDLI: 9,400 years of cosmic radiation and solar activity from ice cores and tree rings

Content Provider	PubMed Central
Author	Steinhilber, Friedhelm Abreu, Jose A. Beer, Jürg Brunner, Irene Christl, Marcus Fischer, Hubertus Heikkilä, Ulla Kubik, Peter W. Mann, Mathias Mccracken, Ken G. Miller, Heinrich Miyahara, Hiroko Oerter, Hans Wilhelms, Frank
Abstract	Understanding the temporal variation of cosmic radiation and solar activity during the Holocene is essential for studies of the solar-terrestrial relationship. Cosmic-ray produced radionuclides, such as 10Be and 14C which are stored in polar ice cores and tree rings, offer the unique opportunity to reconstruct the history of cosmic radiation and solar activity over many millennia. Although records from different archives basically agree, they also show some deviations during certain periods. So far most reconstructions were based on only one single radionuclide record, which makes detection and correction of these deviations impossible. Here we combine different 10Be ice core records from Greenland and Antarctica with the global 14C tree ring record using principal component analysis. This approach is only possible due to a new high-resolution 10Be record from Dronning Maud Land obtained within the European Project for Ice Coring in Antarctica in Antarctica. The new cosmic radiation record enables us to derive total solar irradiance, which is then used as a proxy of solar activity to identify the solar imprint in an Asian climate record. Though generally the agreement between solar forcing and Asian climate is good, there are also periods without any coherence, pointing to other forcings like volcanoes and greenhouse gases and their corresponding feedbacks. The newly derived records have the potential to improve our understanding of the solar dynamics and to quantify the solar influence on climate.
Related Links	http://dx.doi.org/10.1073/pnas.1118965109
Ending Page	5971
Page Count	5
Starting Page	5967
File Format	PDF
ISSN	00278424
e-ISSN	10916490
Journal	Proceedings of the National Academy of Sciences of the United States of America
Issue Number	16
Volume Number	109
Language	English
Publisher	National Academy of Sciences
Publisher Date	2012-04-17
Access Restriction	Open
Rights Holder	National Academy of Sciences
Subject Keyword	General Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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9,400 years of cosmic radiation and solar activity from ice cores and tree rings.

SOLAR ORIGIN OF CHANGES IN THE PRIMARY COSMIC RADIATION *

Atmospheric composition 1 million years ago from blue ice in the Allan Hills, Antarctica

Solar modulation of cosmic ray intensity and solar flare events inferred from (14)c contents in dated tree rings

Gases in ice cores

Ice cores record significant 1940s Antarctic warmth related to tropical climate variability

Radiocarbon content in the annual tree rings during last 150 years and time variation of cosmic rays

Variation of solar activity during the grand solar minima deduced from radiocarbon content in tree rings

The Larger Results of 20 Years of Solar Radiation Observations

9,400 years of cosmic radiation and solar activity from ice cores and tree rings

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9,400 years of cosmic radiation and solar activity from ice cores and tree rings.

SOLAR ORIGIN OF CHANGES IN THE PRIMARY COSMIC RADIATION *

Atmospheric composition 1 million years ago from blue ice in the Allan Hills, Antarctica

Solar modulation of cosmic ray intensity and solar flare events inferred from (14)c contents in dated tree rings

Gases in ice cores

Ice cores record significant 1940s Antarctic warmth related to tropical climate variability

Radiocarbon content in the annual tree rings during last 150 years and time variation of cosmic rays

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9,400 years of cosmic radiation and solar activity from ice cores and tree rings