Extreme solar storms and the quest for exact dating with radiocarbon

• 成果类型: Review
• 署名作者: Heaton, T. J.; Bard, E.; Bayliss, A.; Blaauw, M.; Bronk Ramsey, C.; Reimer, P. J.; Turney, C. S. M.; Usoskin, I.
• 署名单位: University of Leeds; Institut de Recherche pour le Developpement (IRD); Universite PSL; College de France; INRAE; Aix-Marseille Universite; Centre National de la Recherche Scientifique (CNRS); Queens University Belfast; University of Oxford; University of Technology Sydney; University of New South Wales Sydney; University of Oulu; University of Oulu
• 刊物名称: Nature
• ISSN/ISSBN: 0028-3791
• DOI: 10.1038/s41586-024-07679-4
• 发表日期: 2024-09-12
• 关键词: carbon-dioxide; single-year; ad 774-775; c-14; calibration; eruption; event; MODEL; co2; verification

摘要

Radiocarbon (14C) is essential for creating chronologies to study the timings and drivers of pivotal events in human history and the Earth system over the past 55,000 years. It is also a fundamental proxy for investigating solar processes, including the potential of the Sun for extreme activity. Until now, fluctuations in past atmospheric 14C levels have limited the dating precision possible using radiocarbon. However, the discovery of solar super-storms known as extreme solar particle events (ESPEs) has driven a series of advances with the potential to transform the calendar-age precision of radiocarbon dating. Organic materials containing unique 14C ESPE signatures can now be dated to annual precision. In parallel, the search for further storms using high-precision annual 14C measurements has revealed fine-scaled variations that can be used to improve calendar-age precision, even in periods that lack ESPEs. Furthermore, the newly identified 14C fluctuations provide unprecedented insight into solar variability and the carbon cycle. Here, we review the current state of knowledge and share our insights into these rapidly developing, diverse research fields. We identify links between radiocarbon, archaeology, solar physics and Earth science to stimulate transdisciplinary collaboration, and we propose how researchers can take advantage of these recent developments. Understanding how extreme solar storms affect radiocarbon dating has made it possible to obtain calendar ages with annual precision, and future studies could yield insights into archaeology, solar physics and Earth science.