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Article
Open AccessTree-rings reveal two strong solar proton events in 7176 and 5259 BCE
The Sun sporadically produces eruptive events leading to intense fluxes of solar energetic particles (SEPs) that dramatically disrupt the near-Earth radiation environment. Such events have been directly studie...
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Article
Open AccessCosmogenic radionuclides reveal an extreme solar particle storm near a solar minimum 9125 years BP
During solar storms, the Sun expels large amounts of energetic particles (SEP) that can react with the Earth’s atmospheric constituents and produce cosmogenic radionuclides such as 14C, 10Be and 36Cl. Here we pre...
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Article
Eleven-year solar cycles over the last millennium revealed by radiocarbon in tree rings
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...
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Article
A novel chronometry technique for dating irradiated uranium fuels using Cm isotopic ratios
A novel chronometry method is developed to date irradiated nuclear fuels. It is based on the measurement of two Cm isotopic ratios (244Cm/246Cm and 245Cm/246Cm) and does not require the addition of a yield tracer...
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Article
Open AccessAuthor Correction: Tree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE
The original version of this Article contained an error in the Data Availability section, which incorrectly read ‘All data will be freely available via https://www.ams.ethz.ch/research.html
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Article
Open AccessTree rings reveal globally coherent signature of cosmogenic radiocarbon events in 774 and 993 CE
Though tree-ring chronologies are annually resolved, their dating has never been independently validated at the global scale. Moreover, it is unknown if atmospheric radiocarbon enrichment events of cosmogenic ...
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Article
Open AccessMultiradionuclide evidence for the solar origin of the cosmic-ray events of AD 774/5 and 993/4
The origin of two large peaks in the atmospheric radiocarbon (14C) concentration at AD 774/5 and 993/4 is still debated. There is consensus, however, that these features can only be explained by an increase in th...
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Article
Open AccessPlutonium release from Fukushima Daiichi fosters the need for more detailed investigations
The contamination of Japan after the Fukushima accident has been investigated mainly for volatile fission products, but only sparsely for actinides such as plutonium. Only small releases of actinides were esti...
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Article
Timing of deglaciation on the northern Alpine foreland (Switzerland)
In order to understand the forcing and the feedback mechanisms working within the climate system knowledge of the timing of cold events across the globe is necessary. This information is especially crucial for...
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Chapter
Event to Decadal-Scale Glaciochemical Variability on the Inilchek Glacier, Central Tien Shan
