DOI: 10.1002/2014GL062218
论文题名: Cosmic ray event of A.D. 774-775 shown in quasi-annual 10Be data from the Antarctic Dome Fuji ice core
作者: Miyake F. ; Suzuki A. ; Masuda K. ; Horiuchi K. ; Motoyama H. ; Matsuzaki H. ; Motizuki Y. ; Takahashi K. ; Nakai Y.
刊名: Geophysical Research Letters
ISSN: 0094-9089
EISSN: 1944-8820
出版年: 2015
卷: 42, 期: 1 起始页码: 84
结束页码: 89
语种: 英语
英文关键词: cosmic ray event
; cosmogenic nuclide
; ice core
Scopus关键词: Cosmic ray measurement
; Cosmic rays
; Cosmology
; Domes
; Forestry
; Antarctic ice core
; Background variation
; C contents
; Cosmic ray intensity
; Cosmogenic nuclides
; Ice core
; Polar ice core
; Tree rings
; Ice
; beryllium
; concentration (composition)
; cosmic ray
; ice core
; tree ring
; Antarctica
; Ice
; Space (Cosmic)
; Antarctica
; Dome Fuji
; East Antarctica
; Southern Ocean
英文摘要: 14C content in tree rings and 10Be concentration records in polar ice core provide information about past cosmic ray intensities. The A.D. 774-775 cosmic ray event has been identified by 14C measurement in several tree rings from all over the world. Although the quasi-decadal 10Be Dome Fuji data in the Antarctic ice core also shows a sharp peak around A.D. 775, annual 10Be variations in the Dome Fuji core or in other cores have not been revealed. We have measured quasi-annual 10Be concentrations from approximately A.D. 763-794 in the Dome Fuji ice core, and detected a clear increase (~80% above the baseline) in 10Be concentration around A.D. 775. However, an accurate height of this increase is not straightforwardly estimated due to the background variation in 10Be concentration. The 10Be increase can be due to the same cosmic ray event as shown in the 14C content in A.D. 774-775. Key Points We measured 10Be concentrations in the Dome Fuji ice core around A.D. 775 A large and sharp 10Be increment is detected around A.D. 775 Further background studies will make the 10Be event more reliable ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921794430&doi=10.1002%2f2014GL062218&partnerID=40&md5=7e606f4eb9ca6d28e2433b5678fe6c72
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8705
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya, Japan
Recommended Citation:
Miyake F.,Suzuki A.,Masuda K.,et al. Cosmic ray event of A.D. 774-775 shown in quasi-annual 10Be data from the Antarctic Dome Fuji ice core[J]. Geophysical Research Letters,2015-01-01,42(1).