Cosmogenic 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 present 10Be and 36Cl data measured in ice cores from Greenland and Antarctica. The data co...

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Bibliographic Details
Main Authors: Paleari, Chiara I., Mekhaldi, Florian, Adolphi, Florian, Christl, Marcus, Vockenhuber, Christof, Gautschi, Philip, Beer, Jürg, Brehm, Nicolas, Erhardt, Tobias, Synal, Hans-Arno, Wacker, Lukas, Wilhelms, Frank, Muscheler, Raimund
Format: Article in Journal/Newspaper
Language:English
Published: ETH Zurich 2022
Subjects:
Antarc*
Antarctica
Greenland
Online Access:https://dx.doi.org/10.3929/ethz-b-000527622
http://hdl.handle.net/20.500.11850/527622
Description
Summary: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 present 10Be and 36Cl data measured in ice cores from Greenland and Antarctica. The data consistently show one of the largest 10Be and 36Cl production peaks detected so far, most likely produced by an extreme SEP event that hit Earth 9125 years BP (before present, i.e., before 1950 CE), i.e., 7176 BCE. Using the 36Cl/10Be ratio, we demonstrate that this event was characterized by a very hard energy spectrum and was possibly up to two orders of magnitude larger than any SEP event during the instrumental period. Furthermore, we provide 10Be-based evidence that, contrary to expectations, the SEP event occurred near a solar minimum. ... : Nature Communications, 13 (1) ...

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