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Raimund Muscheler

Raimund Muscheler

Professor

Raimund Muscheler

Cosmogenic radionuclides reveal an extreme solar particle storm near a solar minimum 9125 years BP

Författare

  • Chiara I. Paleari
  • Florian Mekhaldi
  • Florian Adolphi
  • Marcus Christl
  • Christof Vockenhuber
  • Philip Gautschi
  • Jürg Beer
  • Nicolas Brehm
  • Tobias Erhardt
  • Hans Arno Synal
  • Lukas Wacker
  • Frank Wilhelms
  • Raimund Muscheler

Summary, in English

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.

Avdelning/ar

  • MERGE: ModElling the Regional and Global Earth system
  • Kvartärgeologi
  • BECC: Biodiversity and Ecosystem services in a Changing Climate

Publiceringsår

2022-12

Språk

Engelska

Publikation/Tidskrift/Serie

Nature Communications

Volym

13

Issue

1

Dokumenttyp

Artikel i tidskrift

Förlag

Nature Publishing Group

Ämne

  • Geology

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 2041-1723