DOI: 10.1002/2015GL063461
论文题名: The impact of geomagnetic spikes on the production rates of cosmogenic 14C and 10Be in the Earth's atmosphere
作者: Fournier A. ; Gallet Y. ; Usoskin I. ; Livermore P.W. ; Kovaltsov G.A.
刊名: Geophysical Research Letters
ISSN: 0094-8721
EISSN: 1944-8452
出版年: 2015
卷: 42, 期: 8 起始页码: 2759
结束页码: 2766
语种: 英语
英文关键词: archeomagnetism
; cosmogenic radionuclides
; intensity spike
; spike field models
Scopus关键词: Budget control
; Earth atmosphere
; Geomagnetism
; Archeomagnetism
; Cosmogenic isotopes
; Cosmogenic nuclides
; Cosmogenic radionuclides
; Field model
; Intensity change
; Intensity spike
; Large-scale flows
; Isotopes
; cosmogenic radionuclide
; energy budget
; geomagnetic field
英文摘要: We seek corroborative evidence of the geomagnetic spikes detected in the Near East ca. 980 BC and 890 BC in the records of the past production rates of the cosmogenic nuclides 14C and 10Be. Our forward modeling strategy rests on global, time-dependent, geomagnetic spike field models feeding state-of-the-art models of cosmogenic nuclide production. We find that spike models with an energy budget in line with presently inferred large-scale flow at Earth's core surface fail to produce a visible imprint in the nuclide record. Spike models able to reproduce the intensity changes reported in the Near East require an unaccountably high-magnitude core flow, yet their computed impact on cosmogenic isotope production rates remains ambiguous. No simple and unequivocal agreement is obtained between the observed and modeled nuclide records at the epochs of interest. This indicates that cosmogenic nuclides cannot immediately be used to confirm the occurrence of these two geomagnetic spikes. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84929515187&doi=10.1002%2f2015GL063461&partnerID=40&md5=aae55541fd5ae4d2041770b9bd645a26
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8337
Appears in Collections: 科学计划与规划 气候变化与战略
There are no files associated with this item.
作者单位: Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot, Paris, France
Recommended Citation:
Fournier A.,Gallet Y.,Usoskin I.,et al. The impact of geomagnetic spikes on the production rates of cosmogenic 14C and 10Be in the Earth's atmosphere[J]. Geophysical Research Letters,2015-01-01,42(8).