气候变化领域集成服务门户(CCPortal): Eleven-year solar cycles over the last millennium revealed by radiocarbon in tree rings

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DOI	10.1038/s41561-020-00674-0
	Eleven-year solar cycles over the last millennium revealed by radiocarbon in tree rings
	Brehm N.; Bayliss A.; Christl M.; Synal H.-A.; Adolphi F.; Beer J.; Kromer B.; Muscheler R.; Solanki S.K.; Usoskin I.; Bleicher N.; Bollhalder S.; Tyers C.; Wacker L.
发表日期	2021
ISSN	17520894
起始页码	10
结束页码	15
卷号	14 期号:1
英文摘要	The Sun provides the principal energy input into the Earth system and solar variability represents a significant external climate forcing. Although observations of solar activity (sunspots) cover only the last about 400 years, radionuclides produced by cosmic rays and stored in tree rings or ice cores serve as proxies for solar activity extending back thousands of years. However, the presence of weather-induced noise or low temporal resolution of long, precisely dated records hampers cosmogenic nuclide-based studies of short-term solar variability such as the 11-yr Schwabe cycle. Here we present a continuous, annually resolved atmospheric 14C concentration (fractionation-corrected ratio of 14CO2 to CO2) record reconstructed from absolutely dated tree rings covering nearly all of the last millennium (ad 969–1933). The high-resolution and precision 14C record reveals the presence of the Schwabe cycle over the entire time range. The record confirms the ad 993 solar energetic particle event and reveals two new candidates (ad 1052 and ad 1279), indicating that strong solar events that might be harmful to modern electronic systems probably occur more frequently than previously thought. In addition to showing decadal-scale solar variability over the last millennium, the high-temporal-resolution record of atmospheric radiocarbon also provides a useful benchmark for making radiocarbon dating more accurate over this interval. © 2021, The Author(s), under exclusive licence to Springer Nature Limited.
英文关键词	carbon isotope; climate forcing; cosmic ray; ice core; radiocarbon dating; radionuclide; reconstruction; tree ring
语种	英语
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206867
作者单位	Laboratory of Ion Beam Physics, ETHZ, Zurich, Switzerland; Historic England, London, United Kingdom; Department of Geology, Lund University, Lund, Sweden; Climate and Environmental Physics, University of Bern, Bern, Switzerland; Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland; Eawag, Dübendorf, Switzerland; Institute of Environmental Physics, Heidelberg University, Heidelberg, Germany; Max-Planck-Institut für Sonnensystemforschung, Göttingen, Germany; School of Space Research, Kyung Hee University, Yongin, South Korea; Space Physics and Astronomy Research Unit, University of Oulu, Oulu, Finland; Sodankylä Geophysical Observatory, University of Oulu, Oulu, Finland; Underwater Archaeology and Dendroarchaeology, Office for Urbanism, Zurich, Switzerland; Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
推荐引用方式 GB/T 7714	Brehm N.,Bayliss A.,Christl M.,et al. Eleven-year solar cycles over the last millennium revealed by radiocarbon in tree rings[J],2021,14(1).
APA	Brehm N..,Bayliss A..,Christl M..,Synal H.-A..,Adolphi F..,...&Wacker L..(2021).Eleven-year solar cycles over the last millennium revealed by radiocarbon in tree rings.Nature Geoscience,14(1).
MLA	Brehm N.,et al."Eleven-year solar cycles over the last millennium revealed by radiocarbon in tree rings".Nature Geoscience 14.1(2021).